1
• World’s Largest In-Stock Selection
• Frequency-Specific Formulations
• Flexible Mounting Options
The Leading Edge in EMI Shielding Technology
BISECTED & SOLID BEAD STYLES
FOR ROUND AND FLAT CABLES & WIRES
FerriShield FerriteS
Shielded enclosures, even the most robust designs, will permit
electromagnetic energy to enter or exit along the main cabling. FerriShield
Ferrites are one of the most versatile and cost-effective cable shielding
methods available today. Our ferrites attack unwanted RF right on the circuit
wiring, eliminating the need for more costly forms of RFI control. Available
in solid and bisected designs, each style can make the task of regulatory
compliance quicker and less troublesome.
Our bisected styles use FerriShield’s innovative, quick-snap clamshell
enclosures. This unique design concept offers engineers the ultimate in
adaptability and easy installation. The RF absorbing core material interacts
directly with unwanted high-frequency energy and dissipates it effectively
while allowing data signals to pass unimpeded.
Welcome to FerriShield
For more than 25 years, FerriShield ferrites have been the preferred cable
shielding solution for many of the world’s leading EMI Shielding Distributors,
Sales Representatives and OEM’s. Since acquiring the company in 2006,
Leader Tech has embraced the FerriShield philosophy of maintaining the
world’s largest in-stock selection of bisected and solid core ferrites.
The addition of cable mounted ferrites to Leader Tech’s existing EMI shielding
product line has significantly increased value for our customers. Backed
by unparalleled service and engineering support, Leader Tech now offers
the market’s most reliable selection of board, enclosure and cable shielding
solutions.
2
table of contents
ferrites for flat and round cables RFID shielding
testing aids
electrical and mechanical specifications
installation, ordering, part # reference
Universal Wideband Material (28 Material)
10 cable snaps
for round cables
12 sleeve snaps
for round cables
13 USB cable sleeve snap
with universal variable diameter
14 cable bundle clamps
for wire and cable groups
14 telecom cable snaps
for flat-oval cables
15 solid beads and toroids
for round cables
15 extra large toroids
up to 6.66” inside diameter
16 flat cable clamps
for flat cables and flex circuits
16 low profile flat cable clamps
for flat cables and flex-circuits
19 low profile solids
for flat cables and flex-circuits
19 rectangular solids
for flat cables and flex circuits
21 universal wideband bus bar ferrites
extra large openings for most sizes
Low-Frequency Material (33 Material)
22 low frequency cable snaps
for round cables
23 low frequency cable clamps
for flat cables and flex circuits
High-Frequency Material (25 Material)
24 high frequency cable snaps
for round cables
25 high frequency cable clamps
for flat cables and flex circuits
Bluetooth/Microwave Material (20 Material)
26 bluetooth/microwave cable snaps
for round cables
27 bluetooth/microwave cable clamps
for flat cables
28 RFID overview
13.56, 433.32, 860-930 MHz; 2.45 & 5.8 GHz
29 frequency-specific ferrites
13.56, 433.32, 860-930 MHz; 2.45 & 5.8 GHz
7 insertion loss formula
simple engineering calculation model
9 technical information
for specifying products
32 attenuation by part number
impedance performance by frequency
33 material properties
typical performance characteristics
33 cable size by part number
recommended cable sizes
30 engineering kits and test equipment
test fixtures, test probes
34 test probes
electric and magnetic near-field detectors
35 installation guidelines for ferrites
cable size, positioning, attachment options
36 all part numbers by page number
all catalog items in stock at all times
39 ordering
general information, customer samples,
ISO 9001:2008 Quality System Registration, RoHS
3
ISO 9001: 2008
CERTIFIED
✔
RoHS
COMPLIANT
FerriShield Ferrites
Simply one of the most flexible
and cost-effective cable shielding
solutions on the market
4 Frequency-Specific Ferrite Formulations
• 28 Material Wideband Ferrite (Most Popular)
• 33 Material Low-Frequency Ferrite
• 25 Material High-Frequency Ferrite
• 20 Material Bluetooth/Microwave Ferrite
1,000s of Styles and Sizes
• Solid and Bisected Styles
• I.D.’s from .034” to 6.6”
• Round, Square & Flat Shapes
• Special application designs
10 Flexible, Quick Mounting Options
Integrated Mounting Options:
• Snug Cable-Fit
• Button Mount
• Adhesive Mount
• Screw Mount
• Flexible-Grip End Ports
2-Piece Mounting Options:
• Cable Tie Base
• Press Fit Base
• Adhesive Mount Base
• Screw Mount Base
• Screw Mount Strap
www.leadertechinc.com
ISO 9001:2008 registered
PRODUCT OVERVIEW:
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HOW TO select a FerriShield Ferrite for your application
Choose a ferrite material
FerriShield ferrites are offered in (4) unique formulations. The chart below offers an overview
of typical material properties and catalog page references.
Ferrite Performance Catalog Pages
28 Material- Most Popular Wideband 10MHz-1GHz (250MHz peak) 10 to 21
33 Material- Low-Frequency Ferrite 1MHz-60MHz (30MHz peak) 22 to 23
25 Material- High-Frequency Ferrite 1MHz-1.2GHz (700MHz peak) 24 to 25
20 Material- Bluetooth/Microwave 2.45GHz peak 26 to 27
For detailed Attenuation and Material Properties see page 32 and 33
Select a mounting option
Each section of this catalog features multiple mounting options for bisected and solid
bead ferrites. FerriShield Ferrites are recognized for their ease of installation and reliable
performance over time.
Select the inside diameter of your ferrite
FerriShield Ferrites are designed to t tight against the cable or wiring bundle that requires
shielding. Ideally, you should select a ferrite with an inside diameter that is slightly less
(+/- .04”) than the outside diameter of your cable.
For quick reference, all part numbers in this catalog have an accompanying technical drawing
and specications chart that illustrates dimensions and impedance for the selected ferrite.
For a more detailed technical explanation see page 33.
1
2
3
• Ferrite performance typically increases as ferrite volume increases. The larger the
ferrite mass, the better the RF attenuation.
• Smaller cables can be looped through larger ferrites to increase performance.
Impedance increase by the square of the number of loops. For example, by
looping a cable through a ferrite 2 times (22), impedance increases by a factor of 4.
For a detailed explanation see page 6- Electromagnetic Characteristics
• Ferrite installation guidelines and recommendations are shown on page 35
• Attenuation properties by part number can be referenced on page 32
• Maximum recommend cable size by part number can be found on page 33
Helpful Tips and Insider Hints
5
a powerful insertion loss device
Ferrite shielding materials are widely accepted as providing
the simplest, most convenient and most cost-effective solution
for radio frequency interference problems in cables and
connectors. Further, they accomplish both RF attenuation
and suppression of unwanted high frequency oscillations
with no loss in dc or low frequency signal strength.
The basic composition of ferrite materials is a combination
of ferrous oxide and one or more other powdered metals -
most often manganese, zinc, cobalt or nickel. An extensive
selection of shapes and sizes is already available, and custom
geometries may be manufactured for special situations.
There are innite varieties of formulas and performance
levels possible. Each discrete ferrite formulation results in
a stoichiometric ratio which is its performance characteristic
signature regarding electrical, magnetic and mechanical
relationships. The most common expression of ferrites’
performance capabilities is in terms of their permeability
(µ). This property expresses the ratio of the magnitude of
magnetic induction to magnetizing force. The materials are
normally categorized according to initial permeability (µi).
FerriShield has developed four principal formulations
which together serve the common spectrum of today’s
RFI needs. For frequencies from 10 MHz to 1 GHz,
#28 formulation is recommended, especially when higher
frequency harmonics are a consideration. For frequencies
typied by microprocessor speeds in excess of 100MHz
and harmonics peak interference at nominally 700MHz, #25
formulation is designed to cover this range with even some
effect beyond that. For frequencies from 1 MHz to 30 MHz,
#33 material offers a concentration of impedance in that
range with a decreasing effect above 30 MHz. For microwave
frequencies relating to Bluetooth™ 2.45GHz operations, the
#20 material is available. See gure 1 above.
Stated most simply, the operative characteristic which
makes ferrites effective in RFI/EMI suppression is their
variable sensitivity to frequency. With a ferrite installed as a
suppressor, lower frequencies will pass with no signicant
loss. But above the frequency where (tan d/µ) climbs sharply
(see gure 1), the signal couples with the ferrite to create
an impedance which is quite high compared with the rest
of the circuit. The offending RFI is thus immediately and
consistently blocked out by way of impedance damping
of the unwanted high frequency signals. It is this greater
resistive impedance which allows the basically passive,
apparently simple material to suppress multiple signals in a
variety of application situations.
Electromagnetic Characteristics
fig. 3
Two turn loop through
ferrite increases
effective magnetic
path. Impedance
increases by the square
of the number of turns
(N2).
fig. 2
Impedance comparison
vs. cubic volume.
fig. 4
Increased impedance;
multiple turns (N2)
vs. one turn through
ferrite; i.e., 2 turns
(22) = 4 times
impedance
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
850 Permeability ( i)
#28 Ferrite (Popular,
universal formula)
125 Permeability ( i)
#25 Ferrite (Specific,
high-frequency formula)
20 Permeability ( i)
#20 Ferrite (Microwave
formula)
2700 Permeability ( i)
#33 Ferrite (Specific,
low-frequency formula)
fig. 1 Typical attenuation proles
BA
C
Product Profile
6
a powerful insertion loss device
To understand the various practical modeling techniques
employed with ferrite, it is best to prepare a properly engineered
calculation of expected results. An empirical trial and error
method may leave the circuit close to borderline performance
without adequate safety margins. As indicated previously, a
wide range of formulations is possible. The major application
factors to be used when dening a specic ferrite solution for a
particular interference problem include the following:
- Frequency where maximum attenuation is required.
- Amount of attenuation needed.
- Ferrite permeability formulation characteristics as they
relate to the frequency range in question (i.e., initial
permeability)
- Ferrite formulation consistency (i.e., expected range of
variation in attenuation performance)
- Installation environment and mechanical attachment
requirements.
The frequency range requiring attenuation must be matched
to the performance of a given ferrite composition (gure 1
on previous page). The optimum prole would be a ferrite
in which the highest attenuation level coincides with the
disruptive frequency (A). That same ferrite could be used even
if the frequency falls in a lower area of its impedance curve
(B) but there would be correspondingly reduced attenuation.
Conversely, a different ferrite formulation could be employed
in the same frequency situation with the intent of using a
lower part of its performance curve (C). Space and weight
considerations are not normally a concern since good quality
ferrites provide high performance per a given cubic volume.
The modeling procedure to calculate impedance
characteristics of the source and load coupled with the ferrite
suppressor is developed as follows:
Insertion 20 log10 (ZA + ZB + ZF)
Loss (dB) (ZA + ZB)
Where:
Insertion Loss = A measure of the effectiveness of
a lter, expressed in decibels, is described as the
ratio of voltages with, and without, the lter in
the circuit.
ZA = Source Impedance
ZB = Load Impedance
ZF = Ferrite Impedance
If the circuit impedance (ZA + ZB) is 50 ohms and the ferrite
impedance is 250 ohms, then the insertion loss will be:
20 Log10 (50+250)/50 = 15.56 dB
Even though the same unit of ferrite is used, the attenuation
provided by a ferrite suppressor can differ somewhat as the
original circuit impedance varies. The ferrite is more effective
when the circuit impedance is low. For example, by using the
same 250 ohm ferrite in a 75 ohm circuit, the result will be:
20 Log10 (75 + 250)/75 = 12.7 dB
With a high circuit impedance, it may be possible to increase
the number of turns or passes through the ferrite (gures 3
and 4), or to use a larger amount of ferrite (cubic volume) in the
circuit in order to achieve the same level of insertion loss (g. 2).
By increasing the number of turns (passes) through the ferrite
opening, the “effective magnetic path” is increased _ impedance
then increases by the square of the number of turns (N2) ; i.e.,
two turns (22) = 4 times the impedance. When additional ferrite
volume is added, impedance increases on almost a direct
percentage basis; i.e., a 100 percent increase in volume will
provide about 100 percent increase in impedance (gure 2)
in most situations according to certain prescribed dimensional
ratios.
An alternative modeling procedure may also be structured in
reverse by solving for a desired insertion loss goal. The result
yields an impedance requirement. This can be matched to
known performance proles of existing ferrite congurations in
the geometric style best suited for mechanical and packaging
requirements.
As an example, a 15dB insertion loss is required for a at ribbon
cable at 100 MHz. Using the formula:
Insertion Loss (dB) = 20 log10 (ZA + ZB + ZF)
(ZA + ZB)
Where: IL = 15 dB
ZA = 25 ohms
ZB = 25 ohms
ZF = Unknown ferrite impedance
(solve for this value)
15dB = 20 Log10 50 + ZF
25 + 25
0.75 = Log10 50 + ZF
50
5.625 = 50 + ZF
50
ZF = 231.25 ohms
Next, refer to the Attenuation Properties on page 36. The at
ribbon cable style part that closely matches is #28B2480 with a
250½ impedance at 100 MHz.
Once the ferrite suppressor is installed in the circuit, results
should be conrmed by testing. Although these ferrites are
“linear,” the term is relative to the common operating range of
temperatures. The permeability is different at every degree of
temperature. The published initial permeability (µi) nomenclature
applies to standard temperature, 59°F (15°C) only. There are
only minor impedance differences, however, throughout normal
operational ranges and up to 180° F (82°C). See Material
Properties on page 33.
=
Organizing the Engineering Model
(
()
)
7
ferrites for interference control
SHIELDING EFFECTIVENESS (dB)
PERCENT ATTENUATION
ATTENUATION RATIO
020406080 100 120
99.9999
99.999
99.99
99.9
99.0
90.0
1,000,000:1
100,000:1
10,000:1
1,000:1
100:1
10:1
Any device used to block an RFI signal between its source
and a receiver is an electromagnetic interference (EMI) shield.
The measure of this ability to attenuate RFI is Shielding
Effectiveness, SE, which is expressed in decibels, dB, the ratio
of eld strength on one side of the shield to the other side.
The gure above shows the relationship between shielding
effectiveness (in dB), the amount of attenuation, and attenuation
percentage.
The concept of bisected ferrites has been developed
to address a number of industry needs in the area of
Electromagnetic Compatibility, EMC.
• engineering adaptability
• risk-free engineering:
- tight tolerance performance
- easy to upgrade attenuation by changing size or
number of turns.
• easy retrotting
• convenient installation
• integral mounting features
• cost-effectiveness
• extended resistance to core saturation under Direct
Current loads.
• consistent performance
Engineering assistance is always available. We will be
pleased to help with applications, cross-referencing or complete
insertion loss calculations when a custom suppressor is
required.
Design Support
FerriShield Advantages
Typical FerriShield RFI suppressor.
I/O cable with RFI suppressor.
UL recognized
plastic case
Bisected ferrite
RFI absorber
Cable gripping
entry/exit port
The technical air gap in bisected ferrites actually extends
current carrying capability with only an imperceptible
reduction in impedance versus solid ferrites of the
same size. The gap is magnetically insignicant while
it is electrically signicant as a discontinuation, thereby
accommodating more current.
Gap effect of ferrite subjected to direct current.
Controlling RFI/EMI
For attenuation properties by frequency, see page 32 8
AA
C
C
B
B
Advantages
Electronic cabling and wires, by virtue of their length-to-width ratios, are perfect natural antennas. In the
presence of high speed microprocessor signals, cables will conduct, radiate and/or receive unwanted high frequency
interfering signals. Control of radio frequency interference can be assured by proper placement of an insertion loss
device, such as a ferrite suppressor.
Compared to other alternatives, ferrites’ high resistivity per
cubic volume stands out as the most important advantage. Prior
to the development of bisected ferrites, suppression engineering
was restricted to the costly addition of lters, cable shielding,
and less versatile solid core (not bisected) ferrites. While these
methods offer a degree of suppression, they are often awkward to
install and, in many cases, are not completely effective. Bisected
ferrites have a concentrated, homogeneous magnetic structure
with high permeability. They are consistently stable versus time
and temperature, and provide RF suppression without high eddy
current losses.
Anywhere There is an Antenna-Like Structure
Application Points
FerriShield installation locations.
A. Data signals and high frequency interference signals
absorbed and conducted
B. All high frequency interference absorbed by ferrite
suppressor and thermally dissipated
C. Low frequency data signals pass unimpeded
Just snap over circuit wiring to be controlled - even after wiring has been terminated Radio interference sources
usually radiate their RFI power at frequencies above 30 MHz by way of the main cabling, which acts as an antenna.
Installation is simple
CABLING
RFI suppressor functions
BUS BARS
RFI suppressor functions: bus bars
ferrites for interference control
A. Power distribution and high frequency interference
signals absorbed and conducted
B. All high frequency interference absorbed by ferrite
suppressor and thermally dissipated
C. Power distribution characteristics pass unimpeded
For attenuation properties by frequency, see page 32 9
For attenuation properties by frequency, see page 32
28 material wideband ferrites- up to 1GHz applications
A
D
E
C
F
B
Ferrite assembly in fully enclosed nylon case; functional with wires and
cables up to a 2.0” (50,8mm) diameter. Snap closed around wire by
clasping shut to position assembly.
May also be mounted with a at-head screw through the .120” (3,0mm)
diameter hole in the bottom by temporarily removing lower ferrite half.
WITH ADHESIVE MOUNT BASE. Ferrite assembly in fully enclosed
nylon case; various sizes are functional with wires and cables up to a
1.0” (25,4mm) diameter. After closing around wire and clasping shut,
assembly is ready for mounting. Installs by removing protective paper
strip from base and pressing into place.
WITH SCREW MOUNT BASE. Ferrite assembly in fully enclosed
nylon case; various sizes are functional with wires and cables up to a
1.0” (25,4mm) diameter. Mounting base press-ts into receptacle on
bottom. Installs at the intended location with a screw through the .125”
(3,2 mm) diameter hole provided. The base may be positioned at 90º
increments relative to the upper case to provide four alternative assembly
congurations.
WITH VARIABLE DIAMETER END PORTS. Ferrite assembly in fully
enclosed nylon case; various sizes are functional with wires and cables
up to a .500 (12,7 mm) diameter. End ports are surrounded with exible
spring utes to grip a range of cable diameters from .120” to .500” (3,2 to
12,7 mm). The grip-locking action prevents lateral movement along the
cable or wire bundle.
WITH PRESS-FIT BUTTON MOUNT BASE. Ferrite assembly in fully
enclosed nylon case; functional with wires and cables up to a 1.0”
(25,4mm) diameter. Includes a button mount base which press-ts into a
.150” (3,8mm) diameter hole.
A
D
CB
A
D
C
.070 (1,8)
.110(2,8).168(4,3)
B
.150(3,8)
A
D
CB
EF
Adhesive Pad
A
D
CB
EF
(Screw not included)
PART No. A B C D
IMPEDANCE IN OHMS
CS28B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 100 @ 100MHz
CS28B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 73 @ 100MHz
CS28B1937 1.182 30,0 .780 19,8 1.188 30,2 .425 10,8 117 @ 100MHz
CS28B1984 1.218 30,9 .705 17,9 1.220 31,0 .525 13,3 62 @ 100MHz
CS28B1501 1.725 43,8 1.232 31,3 1.720 43,7 .710 18,0 177 @ 100MHz
CS28B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 133 @ 100MHz
CS28B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 See page 31 for more details 380 @ 100MHz
CS28B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 See page 31 for more details 290 @ 100MHz
PART No. A B C D
IMPEDANCE IN OHMS
CF28B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 100 @ 100MHz
CF28B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 73 @ 100MHz
CF28B1937 1.182 30,0 .780 19,8 1.188 30,2 .425 10,8 117 @ 100MHz
CF28B1984 1.218 30,9 .705 17,9 1.220 31,0 .525 13,3 62 @ 100MHz
CF28B1501 1.725 43,8 1.232 31,3 1.720 43,7 .710 18,0 177 @ 100MHz
CF28B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 133 @ 100MHz
CF28B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 380 @ 100MHz
PART No. A B C D E F
IMPEDANCE IN OHMS
CW28B1642 .916 23,3 .885 22,5 .840 21,3 .282 7,2 1.250 31,8 .375 9,5 100 @ 100MHz
CW28B1805 1.105 28,1 .667 16,9 1.025 26,4 .340 8,6 1.250 31,8 .375 9,5 73 @ 100MHz
CW28B1937 1.236 31,4 .780 19,8 1.188 30,2 .425 10,8 1.250 31,8 .375 9,5 117 @ 100MHz
CW28B1984 1.282 32,6 .705 17,9 1.220 31,0 .525 13,3 1.250 31,8 .375 9,5 62 @ 100MHz
CW28B1501 1.789 45,5 1.232 31,3 1.720 43,7 .710 18,0 1.250 31,8 .375 9,5 177 @ 100MHz
CW28B1500 1.789 45,5 1.232 31,3 1.720 43,7 .960 24,4 1.250 31,8 .375 9,5 133 @ 100MHz
CW28B2000 2.414 61,3 1.851 47,0 2.309 58,6 .960 24,4 1.250 31,8 .375 9,5 380 @ 100MHz
Patent No. 5,003,278
PART No. A B C D E F (ref.)
IMPEDANCE IN OHMS
CV28B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 .120 3,0 1.020 25,9 100 @ 100MHz
CV28B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 .120 3,0 .820 20,8 73 @ 100MHz
CV28B1937 1.182 30,0 .780 19,8 1.188 30,2 .375 9,5 .120 3,0 .950 24,1 117 @ 100MHz
CV28B1984 1.218 30,9 .705 17,9 1.220 31,0 .500 12,7 .120 3,0 .940 23,9 62 @ 100MHz
PART No. A B C D E F
IMPEDANCE IN OHMS
CA28B1642 .882 22,4 .885 22,5 .840 21,3 .282 7,2 .375 9,5 .375 9,5 100 @ 100MHz
CA28B1805 1.070 27,2 .667 16,9 1.025 26,4 .340 8,6 .375 9,5 .375 9,5 73 @ 100MHz
CA28B1937 1.212 30,8 .780 19,8 1.188 30,2 .425 10,8 .375 9,5 .375 9,5 117 @ 100MHz
CA28B1984 1.248 31,7 .705 17,9 1.220 31,0 .525 13,3 .375 9,5 .375 9,5 62 @ 100MHz
CA28B1501 1.755 44,6 1.232 31,3 1.720 43,7 .710 18,0 .875 22,2 .875 22,2 177 @ 100MHz
CA28B1500 1.755 44,6 1.232 31,3 1.720 43,7 .960 24,4 .875 22,2 .875 22,2 133 @ 100MHz
CA28B2000 2.380 60,5 1.851 47,0 2.309 58,6 .960 24,4 1.000 25,4 1.500 38,1 380 @ 100MHz
cable snap
cable snap
cable snap
cable snap
cable snap
10
For attenuation properties by frequency, see page 32
28 material wideband ferrites- up to 1GHz applications
WITH SCREW MOUNT BASE. Ferrite assembly in fully enclosed nylon
case; various sizes are functional with wires and cables up to a .520”
(13,2mm) diameter. Mounting base is pre-installed at the intended location
with a screw through the .125” (3,2mm) diameter hole in the bottom. After
closing around wire and clasping shut, assembly snap-ts into base.
AF
E
D
CB
G
cable snap
CW28B0642 .995 25,2 .708 18,0 .780 19,8 .300 7,6 .177 4,5 .818 20,8 1.000 25,4 100 @ 100MHz
CW28B0805 1.180 30,0 .476 12,1 .965 24,5 .345 8,8 .177 4,5 1.003 25,5 .890 22,6 73 @ 100MHz
CW28B0937 1.293 32,8 .691 17,6 1.078 27,4 .425 10,8 .177 4,5 1.116 28,3 .930 23,6 117 @ 100MHz
CW28B0984 1.360 34,5 .547 13,9 1.145 29,1 .525 13,3 .177 4,5 1.183 30,0 .867 22,0 62 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
WITH ADHESIVE MOUNTING BASE. Ferrite assembly in fully enclosed
nylon case; various sizes are functional with wires and cables up to a
.520” (13,2mm) diameter. After closing around wire and clasping shut,
assembly is snap-tted into its mounting base. May be installed in its
intended location before or after product assembly simply by removing
protective paper strip from base and pressing into place.
AF
E
D
CB
G
Adhesive Pad
cable snap
CA28B0642 .995 25,2 .708 18,0 .780 19,8 .300 7,6 .177 4,5 .818 20,8 1.000 25,4 100 @ 100MHz
CA28B0805 1.180 30,0 .476 12,1 .965 24,5 .345 8,8 .177 4,5 1.003 25,5 .890 22,6 73 @ 100MHz
CA28B0937 1.293 32,8 .691 17,6 1.078 27,4 .425 10,8 .177 4,5 1.116 28,3 .930 23,6 117 @ 100MHz
CA28B0984 1.360 34,5 .547 13,9 1.145 29,1 .525 13,3 .177 4,5 1.183 30,0 .867 22,0 62 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
WITH PRESS FIT MOUNT. Ferrite assembly in fully enclosed nylon case;
various sizes are functional with wires and cables up to a .520” (13,2mm)
diameter. After closing around wire and clasping shut, assembly snap-ts
into mounting base. Base may be installed either before or after product
assembly by pressing the integral spring tab fastener into a .187” (4,7mm)
diameter hole.
A
F
E
D
C
H
B
G
cable snap
CF28B0642 .995 25,2 .708 18,0 .780 19,8 .300 7,6 .280 7,1 .183 4,6 1.000 25,4 .240 6,1 100 @ 100MHz
CF28B0805 1.180 30,0 .476 12,1 .965 24,5 .345 8,8 .280 7,1 .183 4,6 .890 22,6 .240 6,1 73 @ 100MHz
CF28B0937 1.293 32,8 .691 17,6 1.078 27,4 .425 10,8 .280 7,1 .183 4,6 .930 23,6 .240 6,1 117 @ 100MHz
CF28B0984 1.360 34,5 .547 13,9 1.145 29,1 .525 13,3 .280 7,1 .183 4,6 .867 22,0 .240 6,1 62 @ 100MHz
PART No. A B C D E F G H IMPEDANCE IN OHMS
Ferrite assembly bonded to nylon strap; functional with wires and cables up to
a 1.00” (25,4 mm) diameter. Holes are provided for screw mounting.
AD
F
CB
E
PART No. A B C D E F
IMPEDANCE IN OHMS
TC28B0550 .685 17,4 1.105 28,1 .685 17,4 .214 5,4 1.102 28,0 .195 5,0 281 @ 100MHz
TC28B0617 .740 18,8 1.125 28,6 .740 18,8 .276 7,0 1.215 30,9 .195 5,0 273 @ 100MHz
TC28B0642 .785 19,9 .630 16,0 .785 19,9 .320 8,1 1.335 33,9 195 5,0 100 @ 100MHz
TC28B0805 .948 24,1 .500 12,7 .948 24,1 .404 10,3 1.498 38,0 .195 5,0 73 @ 100MHz
TC28B0937 1.127 28,6 .551 14,0 1.127 28,6 .449 11,4 1.677 42,6 .195 5,0 117 @ 100MHz
TC28B1123 1.320 33,5 1.125 28,6 1.320 33,5 .543 13,8 2.000 50,8 .195 5,0 220 @ 100MHz
TC28B0984 1.127 28,6 .500 12,7 1.127 28,6 .591 15,0 1.677 42,6 .195 5,0 62 @ 100MHz
TC28B1251 1.375 34,9 .875 22,2 1.375 34,9 .750 19,1 1.884 47,9 .195 5,0 138 @ 100MHz
TC28B1501 1.628 41,4 1.000 25,4 1.628 41,4 .750 19,1 2.150 55,5 .195 5,0 177 @ 100MHz
TC28B1500 1.628 41,4 1.000 25,4 1.628 41,4 1.000 25,4 2.150 55,5 .195 5,0 133 @ 100MHz
TC28B2000 2.125 54,0 1.500 38,1 2.125 54,0 1.000 25,4 2.860 72,6 .281 7,1 380 @ 100MHz
cable clamp
Ferrite assembly in fully enclosed nylon case; functional with wires and
cables up to a .520” (13,2mm) diameter. Snap closed around wire by
clasping shut to position assembly. Cable tie-wraps may be threaded
through the loops on each side.
Larger I.D.’s permit multiple cable turns for greater impedance effect. See
page 6, gures 3 and 4.
A F
E
D
CB
G
cable snap
CS28B0642 .923 23,4 .708 18,0 .780 19,8 .300 7,6 .143 3,6 .818 20,8 1.000 25,4 100 @ 100MHz
CS28B0805 1.095 27,8 .476 12,1 .965 24,5 .345 8,8 .100 2,5 1.003 25,5 .890 22,6 73 @ 100MHz
CS28B0937 1.222 31,0 .691 17,6 1.078 27,4 .425 10,8 .098 2,5 1.116 28,3 .930 23,6 117 @ 100MHz
CS28B0984 1.275 32,3 .547 13,9 1.145 29,1 .525 13,3 .095 2,4 1.183 30,0 .867 22,0 62 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
CS28B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 100 @ 100MHz
CS28B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 73 @ 100MHz
CS28B1937 1.182 30,0 .780 19,8 1.188 30,2 .425 10,8 117 @ 100MHz
CS28B1984 1.218 30,9 .705 17,9 1.220 31,0 .525 13,3 62 @ 100MHz
CS28B1501 1.725 43,8 1.232 31,3 1.720 43,7 .710 18,0 177 @ 100MHz
CS28B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 133 @ 100MHz
CS28B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 See page 31 for more details 380 @ 100MHz
CS28B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 See page 31 for more details 290 @ 100MHz
11
For attenuation properties by frequency, see page 32
Box-shaped ferrite assembly in enclosed nylon case. Various sizes are
functional with wires up to .500” (12,7 mm) diameter. Simply clamp
around cable or wire; plastic tabs at entry/exit ports apply pressure
to cable surface to maintain mounting position. Options include foam
adhesive pad on bottom. Optional Adhesive Pad .030 (0,76)
BC
F
A E D
Available in standard colors gray (i.e., SS28B2031) and black (i.e., SS28B2031K) Patent No. 5,764,125
PART No.
w/ Adhesive
A B C D E F
IMPEDANCE IN OHMS
SS28B2027 AS28B2027 .420 10,7 .468 11,9 .468 11,9 .106 2,7 .072 1,8 .468 11,9 105 @ 100MHz
SS28B2031 AS28B2031 .700 17,8 1.255 31,9 .675 17,1 .230 5,8 .187 4,7 .768 19,5 200 @ 100MHz
SS28B2030 AS28B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5 200 @ 100MHz
SS28B2033 AS28B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5 200 @ 100MHz
SS28B2036 AS28B2036 1.155 29,3 1.250 31,8 1.125 28,6 .415 10,5 .350 8,9 1.230 31,2 230 @ 100MHz
SS28B2041 AS28B2041 .965 24,5 1.285 32,6 .930 23,6 .450 11,4 .380 9,7 1.035 26,3 238 @ 100MHz
SS28B2040 AS28B2040 1.155 29,3 1.250 31,8 1.125 28,6 .550 14,0 .480 12,2 1.230 31,2 230 @ 100MHz
sleeve snap
WITH VARIABLE DIAMETER END PORTS. Box-shaped ferrite assembly in
fully enclosed nylon case. End ports are surrounded with exible spring
utes to grip a range of cable diameters from .125” to .730” (3,2 to 18,5
mm). Special mounting options include foam adhesive pad on bottom.
BC
F
A E D
Optional Adhesive Pad .030 (0,76)
Patent No. 5,003,278 and Patent No. 5,764,125
Available in standard colors gray (i.e., SS28B2034) and black (i.e., SS28B2034K)
PART No.
w/ Adhesive
A B (ref.) C D E F
IMPEDANCE IN OHMS
SS28B2034 AS28B2034 .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3 220 @ 100MHz
SS28B2037 AS28B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5 200 @ 100MHz
SS28B2042 AS28B2042 .965 24,5 1.480 37,6 .930 23,6 .425 10,8 .170 4,3 1.035 26,3 238 @ 100MHz
SS28B2032 AS28B2032 1.155 29,3 1.450 36,8 1.125 28,6 .500 12,7 .200 5,1 1.230 31,2 230 @ 100MHz
SS28B2044 AS28B2044 1.700 43,2 1.800 45,7 1.800 45,7 .790 20,1 .200 5,1 1.830 46,5 260 @ 100MHz
sleeve snap
WITH SECURE INTERNAL LOCKING SYSTEM. Cannot be reopened
after snapping closed into position. Ensures that suppressor cannot be
removed. Grip-lock tabs at entry/exit ports prevent longitudinal slippage
on a range of cable diameters from .275” to .300” (7,0 to 7,6mm). Standard
colors are computer gray (PMS#413), computer beige (PMS#468), black
and natural white. A cost-effective alternative to over-molding. Patent Nos. 5,003,278 , 5,162,772 and 5,764,125
IL28B0642W .780 19,8 .780 19,8 .780 19,8 .316 8,0 NATURAL WHITE 100 @ 100MHz
IL28B0642G .780 19,8 .780 19,8 .780 19,8 .316 8,0 COMPUTER GRAY 100 @ 100MHz
IL28B0642B .780 19,8 .780 19,8 .780 19,8 .316 8,0 COMPUTER BEIGE 100 @ 100MHz
IL28B0642K .780 19,8 .780 19,8 .780 19,8 .316 8,0 BLACK 100 @ 100MHz
PART No. A B (ref.) C D COLOR
IMPEDANCE IN OHMS
internal locking snap
MINIATURE SIZE WITH INTERNAL LOCKING SYSTEM. Cannot be
reopened after snapping closed into position. Ensures that suppressor
cannot be removed. Grip-lock tabs at entry/exit ports prevent longitudinal
slippage on a range of cable diameters from .060” to .120” (1,5 to 3,0mm).
Excellent for tight spaces and low prole applications. A cost-effective
alternative to “molded-in” suppressors, shrink tubing, tie wraps, taping and
other secondary installation operations.
jelly bean snap
Patent Nos. 5,003,278 , 5,162,772 and 5,764,125
Available in standard color gray
PART No. A B C D E
IMPEDANCE IN OHMS
JB28B0010 .670 17,0 .820 20,8 .670 17,0 .290 7,4 .055 1,4 160@ 100MHz
Box-shaped ferrite assembly for cable bundle diameters up to .730”
(18,5mm) diameter. Allows single location for RFI suppression for multiple
cables. Each circuit reacts separately with the suppression material
without saturation. Alternatively, multiple turns of a single cable greatly
increases impedance depending on frequency - see page 6, gures 3 and
4. Optional adhesive mount base.
For optional variable diameter end port version with exible spring utes, see
part numbers SS28B2044 and AS28B2044 in the photo below.
sleeve snap for cable bundles
B
A D
E
C
SS28B2035
1-hole
B
A
E
C
SS28B2035-2
2-holes
B
A
E
C
SS28B2035-3
3-holes
D
D
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
B
A D
F
C
E
SS28B2035 AS28B2035 1.155 29,3 1.250 31,8 1.125 28,6 .790 20,1 .720 18,3 1.230 31,2 129 @ 100MHz
SS28B2043 AS28B2043 1.700 43,2 1.780 45,2 1.800 45,7 .790 20,1 .720 18,3 1.830 46,5 260 @ 100MHz
PART No.
w/ Adhesive
A B C D E F
IMPEDANCE IN OHMS
SS28B2035 available in standard colors gray (SS28B2035) and black (SS28B2035K)
28 material wideband ferrites- up to 1GHz applications
12
For attenuation properties by frequency, see page 32
BC
AD
E
1.70 (43,2)
.032 (0,81)
OPTIONAL ADHESIVE MOUNT BASE
(Preassembled)
OPTIONAL HARDWARE MOUNT BASE
(To be assembled during installation)
OPTIONAL BUTTON MOUNT BASE
(Preassembled)
1.25 (31,8)
.375 (9,52)
.060 (1,52) .125 (3,18)
.070 (1,78)
.168
(4,26) .150 (3,81)
.275 (6,94)
Mounting receptacle
for button and hardware
mount bases.
PART No. Description A B (ref.) C D E
IMPEDANCE IN OHMS
HI28B2039 Basic 1.700 43,2 2.000 50,8 1.800 45,7 .500 12,7 .140 3,55 410 @ 100MHz
HF28B2039 Button Mount 1.700 43,2 2.000 50,8 1.800 45,7 .500 12,7 .140 3,55 410 @ 100MHz
HW28B2039 Hardware Mount 1.700 43,2 2.000 50,8 1.800 45,7 .500 12,7 .140 3,55 410 @ 100MHz
HA28B2039 Adhesive Mount 1.700 43,2 2.000 50,8 1.800 45,7 .500 12,7 .140 3,55 410 @ 100MHz
Patent No. 5,003,278
WITH VARIABLE DIAMETER END PORTS AND
OPTIONAL MOUNTING BASES.
High impedance ferrite assembly with exactly the same characteristics
as the high impedance sleeve snaps above, except that the entry/
exit end ports are surrounded with exible spring utes to grip a range
of cable diameters from .250” to .435” (6,4 to 11,0mm). Excellent for
telecommunications switching applications, local area networks (LANs)
and distribution system integration. The basic version simply clamps
into position around cables and wiring. May also be mounted with a at-
head screw through the .120” (3,0mm) diameter hole in the bottom by
temporarily removing lower ferrite half.
Other mounting options include a foam adhesive base, a button mount
base sized for a .150” (3.8mm) diameter hole, and a hardware mounting
plate for screw or rivet attachment. The adhesive mount base and button
mount base options are preassembled. The hardware mounting base
may be press-tted into the receptacle on the bottom of the case during
installation in one of four positions at 90° increments for alternative
assembly congurations.
BC
AD
1.70 (43,2)
.030 (0,76)
OPTIONAL ADHESIVE MOUNT BASE
(Preassembled)
OPTIONAL HARDWARE MOUNT BASE
(To be assembled during installation)
OPTIONAL BUTTON MOUNT BASE
(Preassembled)
1.25 (31,8)
.375 (9,52)
.060 (1,52) .125 (3,18)
.070 (1,78)
.168
(4,26) .150 (3,81)
.275 (6,94)
E
Mounting receptacle
for button and hardware
mount bases.
WITH OPTIONAL MOUNTING BASES.
High impedance ferrite assembly for large scale applications containing
high data rates and microprocessor harmonics/spurious signals well
beyond the operating frequency. Excellent for telecommunications
switching applications, local area networks (LANs) and distribution
system integration. The basic version simply clamps into position around
cables and wiring. May also be mounted with a at-head screw through
the .120” (3,0mm) diameter hole in the bottom by temporarily removing
lower ferrite half.
Other mounting options include a foam adhesive base, a button mount
base sized for a .150” (3.8 mm) diameter hole, and a hardware mounting
plate for screw or rivet attachment. The adhesive mount base and button
mount base options are preassembled. The hardware mounting base
may be press-tted into the receptacle on the bottom of the case during
installation in one of four positions at 90° increments for alternative
assembly congurations.
BC
AD
E
Mounting receptacle
for button and hardware
mount bases.
BC
AD
1.70 (43,2)
.030 (0,76)
OPTIONAL ADHESIVE MOUNT BASE
(Preassembled)
OPTIONAL HARDWARE MOUNT BASE
(To be assembled during installation)
OPTIONAL BUTTON MOUNT BASE
(Preassembled)
1.25 (31,8)
.375 (9,52)
.060 (1,52) .125 (3,18)
.070 (1,78)
.168
(4,26) .150 (3,81)
.275 (6,94)
E
Mounting receptacle
for button and hardware
mount bases.
PART No. Description A B C D E
IMPEDANCE IN OHMS
HI28B2038 Basic 1.700 43,2 1.780 45,2 1.800 45,7 .428 10,9 .468 11,9 410 @ 100MHz
HF28B2038 Button Mount 1.700 43,2 1.780 45,2 1.800 45,7 .428 10,9 .468 11,9 410 @ 100MHz
HW28B2038 Hardware Mount 1.700 43,2 1.780 45,2 1.800 45,7 .428 10,9 .468 11,9 410 @ 100MHz
HA28B2038 Adhesive Mount 1.700 43,2 1.780 45,2 1.800 45,7 .428 10,9 .468 11,9 410 @ 100MHz
high impedance sleeve snap
high impedance sleeve snap
WITH VARIABLE DIAMETER END PORTS. Specically sized to t the
range of common USB I/O cable diameters; variable diameter end ports
allow for different types of cable insulation covers measuring .125” to
.179” (3,0 - 4,5mm).
Simple snap-on installation. Available with optional adhesive pad on
bottom, and in standard gray (PMS #413) and black colors.
.030" (0,76)
Optional Adhesive Pad
F
BC
AED
Patent Nos. 5,003,278 and 5,764,125
For use with USB I/O USB 2.0 Electrical Test Specication, sections 7.0 and 8.0
USB cable sleeve snap
USB28B2034 USB28B2034A .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3 gray 220 @ 100MHz
USB28B2034K USB28B2034KA .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3 black 220 @ 100MHz
PART No. w/Adhesive A B C D E F
COLOR IMPEDANCE IN OHMS
28 material wideband ferrites- up to 1GHz applications
13
For attenuation properties by frequency, see page 32
WITH SERPENTINE CABLE THREADING CAPABILITY.
By increasing the number of times the circuit passes through the ferrite
core, the effective magnetic path is lengthened yielding a signicant
increase in impedance. See page 6, gures 3 and 4. The gain is equal to
N2, the square of the number of turns, and depending on the circuit cable
load and frequencies involved, much of the increase can be realized.
Cables may be “looped back through” as shown at left; or, “looped over
the top” as shown at left (insert).
In an alternate conguration, separate cable circuits can be accommodated
without saturation. Three styles permit different approaches:
The 1-hole allows two passes of a cable with a diameter up to .365”
(9 ,3mm) or three passes of a cable with a diameter up to .243” (6,2mm).
The 2-hole allows two passes of a cable with a diameter up to .335” (8,5mm).
The 3-hole allows three passes of cable with a diameter up to .203” (5,8mm).
Each is available with an optional adhesive foam pad mounting base.
B
A D
E
C
SS28B2035
1-hole
B
A
E
C
SS28B2035-2
2-holes
B
A
E
C
SS28B2035-3
3-holes
D
D
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
B
A D
F
C
E
WITH UNIVERSAL MOUNTING STRAP. For cable bundle diameters
up to 1.00” (25,4mm). Allows single location for RFI suppression for
multiple cables and wiring runs. Each circuit reacts independently with
the suppression material without saturation. Adhesive mount base also
provides a centered .203” (5,1mm) diameter hole for optional hardware
attachment. Quick-release closure clip allows easy addition or removal of
wires.
WITH END PORTS FOR FLAT-OVAL CABLES. Box-shaped ferrite
assembly in fully enclosed nylon case. Two sizes: one for 4-conductor
and one for 6-conductor standard telecom at-oval cable. Clamps around
cable with appropriate pressure to maintain desired position.
WITH INTERNAL FRICTION GRIP Exterior PVC sheath pre-molded over
ferrite suppressor. Assembles to cable prior to termination by threading
in one end and out the other. Neutral gray standard color. Five sizes
accommodate cable diameters from .200” to .430” (5,1 to 10,9mm).
The preferred alternative to cable over-molding, shrink tubing, taping, tie
wraps and other costly secondary installation operations. A drop of water
in the I.D. during assembly will facilitate sliding into position.
F
A
DGE
C
REF
B
A
D
B
C
Adhesive pad
BC
F
A E D
BC
F
AED
SS28B2031 - 6 conductor
SS28B2034 - 4-conductor
Available in standard colors gray (i.e., SS28B2034) and black (i.e., SS28B2034K)
Patent Nos. 5,003,278 and 5,764,125
BC28B1251 BA28B1251 1.38 35,1 .75 19,1 .875 22,2 1.71 41,7 138 @ 100MHz
BC28B1501 BA28B1501 1.63 41,4 .75 19,1 1.000 25,4 1.96 48,0 177 @ 100MHz
BC28B1500 BA28B1500 1.63 41,4 1.00 25,4 1.000 25,4 1.96 48,0 133 @ 100MHz
PART No. w/ adhesive A B C D
IMPEDANCE IN OHMS
Patent No. 5,200,730
PART No. A B C D E F G
IMPEDANCE IN OHMS
PM28B3375 .192 4,8 .290 7,4 .465 11,8 2.01 51,1 .250 6,4 .960 24,4 .800 20,3 140 @ 100MHz
PM28B0625 .310 7,9 .400 10,2 .715 18,2 1.82 46,2 .250 6,4 .772 19,6 .800 20,3 120 @ 100MHz
PM28B1625 .310 7,9 .400 10,2 .715 18,2 2.38 60,5 .250 6,4 1.335 33,9 .800 20,3 225 @ 100MHz
PM28B0686 .375 9,5 .465 11,8 .776 19,7 2.38 60,5 .250 6,4 1.335 33,9 .800 20,3 196 @ 100MHz
PM28B0736 .430 10,9 .520 13,2 .776 19,7 2.38 60,5 .250 6,4 1.335 33,9 .800 20,3 176 @ 100MHz
PART No. Cable Size A B C D E F
IMPEDANCE IN OHMS
SS28B2034 4 conductor .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3 220 @ 100MHz
SS28B2031 6 conductor .700 17,8 1.255 31,9 .675 17,1 .230 5,8 .187 4,7 .768 19,5 200 @ 100MHz
very high impedance multi-turn sleeve snap
cable bundle clamp
telecom cable snaps
pre-molded sleeve
For situations where extremely high amounts of attenuation are needed and/or
multiple passes through a traditional ferrite I.D. are not practical or sufcient.
Simply wrap cable in a spiral around bar for optimum absorption.
• One individual size ts most applications
• For round or at cables wound axially or attached longitudinally
• Attachment with cable ties or optional adhesive pad
• Sandwiching cable between two bars provides up to three times the
impedance of a single bar depending on frequency
B
C
A
* Optional Adhesive pad .030 (0,76)
*
SB28B5630 SB28B5630A .365 9,3 5.630 143,0 1.00 25,4 one pass: 500 @ 100MHz
PART No. w/ adhesive A B C
IMPEDANCE IN OHMS
special purpose shielding bar
Available in standard colors gray (i.e., SS28B2035) and black (i.e., SS28B2035K)
Patent No. 5,003,278
PART No. w/Adhesive Description A B C D E
IMPEDANCE IN OHMS ref.
SS28B2035 AS28B2035 1-hole 1.155 29,3 1.250 31,8 1.125 28,6 .780 19,8 1.230 31,2 1N=129* 2N=22=4NΩ ref.
SS28B2035-2 AS28B2035-2 2-hole 1.155 29,3 1.250 31,8 1.125 28,6 .335 8,5 1.230 31,2 1N=270* 3N=32=9NΩ ref.
SS28B2035-3 AS28B2035-3 3-hole 1.155 29,3 1.250 31,8 1.125 28,6 .203 5,2 1.230 31,2 1N=340* depending on circuit
load and frequency
* @ 100 MHz
28 material wideband ferrites- up to 1GHz applications
14
For attenuation properties by frequency, see page 32
toroids
Cables can many times be assembled through the larger center opening
even with connectors and plugs installed beforehand. Multiple cable turns
through the center yield greater suppression and the exibility to ne-tune
a circuit. Up to 1.400” (35,6mm) I.D.
C
BA
extra large toroids
square tiles
For purpose-built electronic enclosures and architectural full room lining,
these designs permit optimum absorption with minimum reection. Very
effective when used just in the corners of shielded rooms to dampen the
effects of sharp corners.
Special order only; available by quotation. Please contact customer
service with quantity information. Some items in stock.
WITH INSIDE DIAMETERS FROM 1.33” TO 6.66” (33.8 to 167 mm).
Very large toroids for special purpose applications available in #28
material as shown below, and in #25 material.
Special order only: available by quotation. Please contact customer
service with quantity information. Some items in stock.
&
%
$
C
B
A
large beads
Sizes up to 1.0” I.D. (25,4 mm) for applications where there are large
cable bundles or where great amounts of suppression are required.
miniature beads A B
C
A
C
B
Very small cylindrical suppressors for wire diameters below .25” (6,4mm).
Handy for tight spaces, on-board suppression and general applications.
PART No. A B C
IMPEDANCE IN OHMS
28B0137-3 .500 12,7 .138 3,5 .051 1,3 153 @ 100MHz
28B0138-7 .550 14,0 .138 3,5 .034 0,9 234 @ 100MHz
28B0200-4 .900 22,9 .200 5,1 .062 1,6 318 @ 100MHz
28B0250-1 .625 15,9 .250 6,4 .125 3,2 133 @ 100MHz
28B0300-0 .200 5,1 .300 7,6 .069 1,8 93 @ 100MHz
28B0385-2 .650 16,5 .385 9,8 .038 0,9 452 @ 100MHz
28B0350-0 .625 15,9 .343 8,7 .170 4,3 102 @ 100MHZ
28B0355-0 .354 9,0 .787 20,0 .187 4,7 138 @ 100MHz
28B0375-3 .750 19,1 .375 9,5 .192 4,8 140 @ 100MHz
28B0562-2 1.125 28,6 .562 14,2 .250 6,4 257 @ 100MHz
PART No. A B C
IMPEDANCE IN OHMS
28B0563-0 .600 15,2 .562 14,2 .286 7,3 124 @ 100MHz
28B0625-0 .562 14,3 .625 15,9 .310 7,9 120 @ 100MHz
28B0625-1 1.125 28,6 .625 15,9 .310 7,9 225 @ 100MHz
28B0626-0 .625 15,9 .626 16,0 .133 3,4 300 @ 100MHz
28B0672-0 .672 17,1 1.000 25,4 .345 8,6 182 @ 100MHz
28B0672-1 1.000 25,4 .672 17,1 .345 8,6 182 @ 100MHz
28B0686-2 1.125 28,6 .686 17,4 .375 9,5 196 @ 100MHz
28B0735-0 1.125 28,6 .735 18,7 .400 10,2 188 @ 100MHz
28B0736-0 1.125 28,6 .736 18,7 .430 10,9 176 @ 100MHz
28B1020-1 1.125 28,6 1.020 25,9 .505 12,8 225 @ 100MHz
28B1102-1 1.000 25,4 1.102 27,9 .620 15,7 147 @ 100MHz
28B1250-2 1.000 25,4 1.250 31,8 .750 19,1 151 @ 100MHz
28B1387-1 1.000 25,4 1.387 35,2 .882 22,4 142 @ 100MHz
28B2000-3 2.000 50,8 2.000 50,8 1.000 25,4 381 @ 100MHz
PART No. A B C
IMPEDANCE IN OHMS
28B0870-0 .250 6,4 .870 22,1 .540 13,7 One Pass 25 @ 100MHz
28B0999-0 .500 12,7 1.000 25,4 .610 15,5 One Pass 83 @ 100MHz
28B1225-0 .612 15,5 1.225 31,1 .750 19,1 One Pass 97 @ 100MHz
28B1417-2 .500 12,7 1.417 36,0 .905 23,0 One Pass 89 @ 100MHz
28B2400-0 .500 12,7 2.400 61,0 1.400 35,6 One Pass 88 @ 100MHz
28B2275 .500 12,7 2.275 57,8 1.335 33,9 Per Application
28B2945 .500 12,7 2.945 74,8 1.775 45,1 Per Application
28B3170 .500 12,7 3.170 80,5 1.645 41,8 Per Application
28B4100 .500 12,7 4.100 104,1 2.650 67,3 Per Application
28B5945 .500 12,7 5.885 149,4 4.275 108,6 Per Application
28B5950 .500 12,7 5.885 149,4 3.675 93,3 Per Application
28B9210 1.000 25,4 9.210 233.9 6.665 169,3 Per Application
PART No. A B C
IMPEDANCE IN OHMS
PART No. A B C
IMPEDANCE IN OHMS
21T3350 .248 6,3 3.350 85,0 3.350 85,0 Per Application
21T3937 .248 6,3 3.937 100,0 3.937 100,0 Per Application
21T4335 .248 6,3 4.335 110,0 4.335 110,0 Per Application
SS28B2035 AS28B2035 1-hole 1.155 29,3 1.250 31,8 1.125 28,6 .780 19,8 1.230 31,2 1N=129* 2N=22=4NΩ ref.
SS28B2035-2 AS28B2035-2 2-hole 1.155 29,3 1.250 31,8 1.125 28,6 .335 8,5 1.230 31,2 1N=270* 3N=32=9NΩ ref.
SS28B2035-3 AS28B2035-3 3-hole 1.155 29,3 1.250 31,8 1.125 28,6 .203 5,2 1.230 31,2 1N=340*
28 material wideband ferrites- up to 1GHz applications
15
For attenuation properties by frequency, see page 32
flat cable clamp
WITH FULL OUTER ENCLOSURE. Ferrite assembly in fully enclosed
nylon case. Four sizes functional with at cables up to 64-conductor
widths. Internal grip-lock tabs apply pressure on cable to maintain
mounting position.
May also be mounted with at-head screws through the .120” (3,0mm)
diameter holes on 1.25” (31,8mm) centers in the bottom by temporarily
removing the lower ferrite half. Excellent for ex-circuits.
flat cable clamp
WITH FULL OUTER ENCLOSURE AND ADHESIVE MOUNT. Ferrite
assembly in fully enclosed nylon case. Four sizes functional with at
cables up to 64-conductor widths. Internal grip-lock tabs apply pressure
on cable to maintain mounting position.
Installs easily on any mounting surface by removing liner from foam
adhesive base pad. Excellent for ex-circuits.
B
C
D
E
A
B
C
D
E
A
A
Adhesive pad
B
C
D
E
A
Adhesive pad
B
C
D
E
PART No. A B C D E
IMPEDANCE IN OHMS
RA28B1729 .700 17,8 2.03 51,6 1.312 33,3 .060 1,5 1.355 34,4 200 @ 100MHz
RA28B2480 .700 17,8 2.76 70,1 1.312 33,3 .060 1,5 2.047 52,0 250 @ 100MHz
RA28B3012 .700 17,8 3.26 82,8 1.312 33,3 .060 1,5 2.540 64,5 286 @ 100MHz
RA28B4340 .785 19,9 4.61 117,1 1.312 33,3 .104 2,6 3.240 82,3 325 @ 100MHz
PART No. A B C D E
IMPEDANCE IN OHMS
RC28B1729 .670 17,0 2.03 51,6 1.312 33,3 .060 1,5 1.355 34,4 200 @ 100MHz
RC28B2480 .670 17,0 2.76 70,1 1.312 33,3 .060 1,5 2.047 52,0 250 @ 100MHz
RC28B3012 .670 17,0 3.26 82,8 1.312 33,3 .060 1,5 2.540 64,5 286 @ 100MHz
RC28B4340 .755 19,2 4.61 117,1 1.312 33,3 .104 2,6 3.240 82,3 325 @ 100MHz
low profile flat cable clamp
SLIM-LINE FLAT CABLE CLAMP WITH CABLE GRIP OPENINGS AND
ADHESIVE MOUNT. Ferrite pair snaps together into the lowest prole
nylon enclosure available. Three sizes accommodate at cables up to
40-conductors. Internal grip-lock tabs apply pressure on cable to maintain
mounting position. Installs easily on any mounting surface by removing
liner from foam adhesive base pad.
Excellent for ex-circuits.
PART No. A B C D E
IMPEDANCE IN OHMS
RA28B0765 .400 10,2 1.065 27,1 1.312 33,3 .038 0,97 .547 13,9 142 @ 100MHz
RA28B1265 .400 10,2 1.560 39,6 1.312 33,3 .038 0,97 1.047 26,6 148 @ 100MHz
RA28B2265 .400 10,2 2.560 65,0 1.312 33,3 .038 0,97 2.047 52,0 154 @ 100MHz
C
D
E
A
Adhesive pad
B
C
C
D
E
A
Adhesive pad
B
C
C
D
E
A
Adhesive pad
B
C
low profile flat cable clamp
SLIM-LINE FLAT CABLE CLAMP WITH CABLE GRIP OPENINGS.
Ferrite pair snaps together into the lowest prole nylon enclosure
available. Three sizes accommodate at cables up to 40-conductors.
Internal grip-lock tabs maintain mounting position. Mounts also with at-
head screws through the .120” (3,0mm) diameter holes in the bottom by
temporarily removing the lower ferrite half.
Excellent for ex-circuits.
RC28B0765 .370 9,4 1.065 27,1 1.312 33,3 .038 0,97 .547 13,9 .250 6,4 142 @ 100MHz
RC28B1265 .370 9,4 1.560 39,6 1.312 33,3 .038 0,97 1.047 26,6 .750 19,1 148 @ 100MHz
RC28B2265 .370 9,4 2.560 65,0 1.312 33,3 .038 0,97 2.047 52,0 1.750 44,5 154 @ 100MHz
PART No. A B C D E F
IMPEDANCE IN OHMS
B
C
D
E
A
F
C
.120"
(3,0mm)
B
C
D
E
A
F
C
.120"
(3,0mm)
B
C
D
E
A
F
C
.120"
(3,0mm)
1. Place cable over lower half.
2. Align tabs and pockets on one end.
3. Rotate top half onto bottom clipping
both sides in one smooth motion.
Tab
Pocket
1. Place cable over lower half.
2. Align tabs and pockets on one end.
3. Rotate top half onto bottom clipping
both sides in one smooth motion.
Tab
Pocket
Very Low
Prole
Very Low
Prole
28 material wideband ferrites- up to 1GHz applications
16
For attenuation properties by frequency, see page 32
WITH SINGLE PRESS FIT MOUNT. Ferrite assembly bonded in nylon
mounting clamp; easily installed by pressing the integral spring tab
fastener into a .250” (6,4mm) diameter hole. Seven sizes accommodate
all at cables up to 50-conductor width. Fits substrates up to .070”
(1,8mm) thickness.
WITH DUAL PRESS FIT MOUNTS. Ferrite assembly bonded in
nylon mounting clamp; easily installed by pressing the integral spring
tab fasteners into two .219” (5,6mm) diameter holes. Three sizes
accommodate all at cables up to 50-conductor width. Fits substrates up
to .070” (1,8mm) thickness.
WITH ADHESIVE MOUNT. Ferrite assembly bonded in nylon mounting
clamp; easily installed by peeling protective paper strip from base
and pressing into place. Nine sizes accommodate all at cables up to
50-conductor width.
B
C
A
E
D
Adhesive pad
FD28B2375 .800 20,3 3.180 80,8 1.050 26,7 .280 7,1 .183 4,6 1.720 43,7 2.550 64,8 195 @ 100MHz
FD28B2480 .800 20,3 3.180 80,8 1.125 28,6 .280 7,1 .183 4,6 2.047 52,0 2.550 64,8 250 @ 100MHz
FD28B3012 .800 20,3 3.700 94,0 1.125 28,6 .280 7,1 .183 4,6 2.540 64,5 2.550 64,8 286 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
WITH SPLIT END CAPS, ADHESIVE MOUNT. Ferrite assembly press-
tted into a pair of nylon end caps with adhesive foam mounting pads. Ten
sizes accommodate at cables up to 64-conductor width.
WITH SPLIT END CAPS, HARDWARE MOUNT. Ferrite assembly press-tted
into a pair of nylon end caps. Mounts using screws, push-rivets, or other
hardware. Ten sizes accommodate at cables up to 64-conductor width.
C
.245"
(5,7mm)
ED
A
G
B
F
.125"
(3,2mm)
C
E
G
D
A
B
F
Adhesive pad
PART No. A B C D E F G
IMPEDANCE IN OHMS
SE28B0071 .375 9,5 .815 20,7 1.190 30,2 .060 1,5 .470 11,9 .510 13,0 .900 22,9 49 @ 100MHz
SE28B0121 .375 9,5 1.315 33,4 1.190 30,2 .060 1,5 1.000 25,4 1.000 25,7 .900 22,9 97 @ 100MHz
SE28B0146 .375 9,5 1.565 39,8 1.190 30,2 .060 1,5 1.250 31,8 1.260 32,0 .900 22,9 120 @ 100MHz
SE28B0221 .375 9,5 2.315 58,8 1.190 30,2 .060 1,5 2.000 50,8 2.010 51,1 .900 22,9 176 @ 100MHz
SE28B1240 .625 15,9 1.365 34,7 1.829 46,5 .040 1,0 .725 18,4 1.020 25,9 1.500 38,1 250 @ 100MHz
SE28B1729 .625 15,9 1.849 47,0 1.829 46,5 .060 1,5 1.300 33,0 1.355 34,4 1.500 38,1 200 @ 100MHz
SE28B2480 .625 15,9 2.570 65,3 1.829 46,5 .060 1,5 2.000 50,8 2.047 52,0 1.500 38,1 250 @ 100MHz
SE28B3012 .625 15,9 3.125 79,4 1.829 46,5 .060 1,5 2.550 64,8 2.540 64,5 1.500 38,1 286 @ 100MHz
SE28B3500 .625 15,9 3.620 91,9 1.829 46,5 .060 1,5 3.020 76,7 3.000 76,2 1.500 38,1 290 @ 100MHz
SE28B4340 .625 15,9 4.460 113,3 1.829 46,5 .104 2,6 3.875 98,4 3.240 82,3 1.500 38,1 325 @ 100MHz
flat cable clamp
flat cable clamp
flat cable clamp
flat cable clamp
flat cable clamp
FA28B0071 FC28B0071 .520 13,2 1.244 31,6 .750 19,1 .060 1,5 .510 13,0 49 @ 100 MHz
FA28B0121 FC28B0121 .520 13,2 1.790 45,5 .750 19,1 .060 1,5 1.010 25,7 97 @ 100 MHz
FA28B1240 FC28B1240 .520 13,2 1.790 45,5 1.125 28,6 .040 1,0 1.020 25,9 250 @ 100MHZ
FA28B1265 .520 13,2 1.790 45,5 1.125 28,6 .038 1,0 1.047 26,6 148 @ 100MHZ
FA28B1729 FC28B1729 .800 20,3 2.430 61,7 1.125 28,6 .060 1,5 1.355 34,4 200 @ 100 MHz
FA28B2265 .520 13,2 3.000 80,8 1.125 28,6 .038 1,0 2.047 52,0 154 @ 100 MHZ
FA28B2375 FC28B2375 .800 20,3 3.180 80,8 1.050 26,7 .060 1,5 1.720 43,7 195 @ 100 MHz
FA28B2480 FC28B2480 .800 20,3 3.180 80,8 1.125 28,6 .060 1,5 2.047 52,0 250 @ 100 MHz
FA28B3012 FC28B3012 .800 20,3 3.700 94,0 1.125 28,6 .060 1,5 2.540 64,5 286 @ 100 MHz
PART No. w/o Adhesive A B C D E
IMPEDANCE IN OHMS
FF28B0121 .475 12,7 1.790 45,5 .750 19,1 .325 8,3 .240 6,1 1.010 25,7 .060 1,5 97 @ 100MHz
FF28B1240 .475 12,7 1.790 45,5 1.125 28,6 .325 8,3 .240 6,1 1.020 25,9 .040 1,0 250 @ 100MHz
FF28B1265 .475 12,7 1.790 45,5 1.125 28,6 .325 8,3 .240 6,1 1.047 26,6 .038 1,0 148 @ 100MHz
FF28B1729 .800 20,3 2.430 61,7 1.125 28,6 .280 7,1 .183 4,6 1.355 34,4 .060 1,5 200 @ 100MHz
FF28B2375 .800 20,3 3.180 80,8 1.050 26,7 .280 7,1 .183 4,6 1.720 43,7 .060 1,5 195 @ 100MHz
FF28B2480 .800 20,3 3.180 80,8 1.125 28,6 .280 7,1 .183 4,6 2.047 52,0 .060 1,5 250 @ 100MHz
FF28B3012 .800 20,3 3.700 94,0 1.125 28,6 .280 7,1 .183 4,6 2.540 64,5 .060 1,5 286 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
SA28B0071 .405 10,3 .815 20,7 1.190 30,2 .060 1,5 .245 5,7 .510 13,0 .125 3,2 49 @ 100MHz
SA28B0121 .405 10,3 1.315 33,4 1.190 30,2 .060 1,5 .245 5,7 1.010 25,7 .125 3,2 97 @100MHz
SA28B0146 .405 10,3 1.565 39,8 1.190 30,2 .060 1,5 .245 5,7 1.260 32,0 .125 3,2 120 @ 100MHz
SA28B0221 .405 10,3 2.315 58,8 1.190 30,2 .060 1,5 .245 5,7 2.010 51,1 .125 3,2 176 @ 100MHz
SA28B1240 .655 16,6 1.365 34,7 1.829 46,5 .040 1,0 .245 5,7 1.020 25,9 .125 3,2 250 @ 100MHz
SA28B1729 .655 16,6 1.849 47,0 1.829 46,5 .060 1,5 .245 5,7 1.355 34,4 .125 3,2 200 @ 100MHz
SA28B2480 .655 16,6 2.570 65,3 1.829 46,5 .060 1,5 .245 5,7 2.047 52,0 .125 3,2 250 @ 100MHz
SA28B3012 .655 16,6 3.125 79,4 1.829 46,5 .060 1,5 .245 5,7 2.540 64,5 .125 3,2 286 @ 100MHz
SA28B3500 .655 16,6 3.620 91,9 1.829 46,5 .060 1,5 .245 5,7 3.000 76,2 .125 3,2 290 @ 100MHz
SA28B4340 .655 16,6 4.460 113,3 1.829 46,5 .104 2,6 .245 5,7 3.240 82,3 .125 3,2 325 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
B
C
A
.325" (8,3mm)
F
G
E
D
B
C
A
G
D
.060" (1,5mm)
F
.240" (6,1mm)
E
28 material wideband ferrites- up to 1GHz applications
17
For attenuation properties by frequency, see page 32
high impedance flat cable clamp
high impedance flat cable clamp
high impedance flat cable clamp
WITH SINGLE PRESS FIT MOUNT. Extra wide ferrite assembly greatly
increases effective magnetic path. Bonded in nylon mounting clamp;
easily installed by pressing the integral spring tab fastener into a .250”
(6,4mm) diameter hole. Three sizes accommodate all at cables up to
50-conductor width. Fits substrates up to .070” (1,8mm) thickness.
WITH DUAL PRESS FIT MOUNTS. Extra wide ferrite assembly greatly
increases effective magnetic path. Bonded in nylon mounting clamp;
easily installed by pressing the integral spring tab fasteners into two .219”
(5,6mm) diameter holes. Two sizes accommodate all at cables up to
50-conductor width. Fits substrates up to .070” (1,8mm) thickness.
WITH ADHESIVE MOUNT. Extra wide ferrite assembly greatly increases
effective magnetic path. Bonded in nylon mounting clamp; easily installed
by peeling protective paper strip from base and pressing into place.
Three sizes accommodate all at cables up to 50-conductor width.
B
C
A
E
D
Adhesive pad
PART No. w/o Adhesive A B C D E
IMPEDANCE IN OHMS
FA28B1785 FC28B1785 .800 20,3 2.430 61,7 1.500 38,1 .060 1,5 1.355 34,4 260 @ 100MHz
FA28B2500 FC28B2500 .800 20,3 3.180 80,8 1.500 38,1 .060 1,5 2.047 52,0 325 @ 100MHz
FA28B3000 FC28B3000 .800 20,3 3.700 94,0 1.500 38,1 .060 1,5 2.540 64,5 370 @ 100MHz
FF28B1785 .800 20,3 2.430 61,7 1.500 38,1 .280 7,1 .183 4,6 1.355 34,4 .060 1,5 260 @ 100MHz
FF28B2500 .800 20,3 3.180 80,8 1.500 38,1 .280 7,1 .183 4,6 2.047 52,0 .060 1,5 325 @ 100MHz
FF28B3000 .800 20,3 3.700 94,0 1.500 38,1 .280 7,1 .183 4,6 2.540 64,5 .060 1,5 370 @ 100MHz
high impedance flat cable sleeve clamp
WITH 15-CONDUCTOR FLAT CABLE OPENING. Uniquely accommodates
at cables up to 15-conductors through the horizontal opening with
substantially more impedance than standard at clamps used typically for
this type of application.
Available with optional adhesive foam mounting pad base.
PART No.
w/ Adhesive Pad
A B C D E F
IMPEDANCE IN OHMS
SS28B2035-15 AS28B2035-15 1.16 29,4 1.25 31,8 1.125 28,6 .038 1,1 1.230 35,1 .755 21,6 270 @ 100MHz
B
D
E
C
F
G
Atyp.
B
D
E
C
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
F
G
A
Patent No. 5,003,278
FD28B2500 .800 20,3 3.180 80,8 1.500 38,1 .280 7,1 .183 4,6 2.047 52,0 2.550 64,8 325 @ 100MHz
FD28B3000 .800 20,3 3.700 94,0 1.500 38,1 .280 7,1 .183 4,6 2.540 64,5 2.550 64,8 370 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
PART No. A B C D E F G
IMPEDANCE IN OHMS
Available in standard colors gray (SS28B2035-15) and black (SS28B2035-15K)
B
C
A
G
D
.060" (1,5mm)
F
.240" (6,1mm)
E
B
C
A
.325" (8,3mm)
F
G
E
D
28 material wideband ferrites- up to 1GHz applications
18
For attenuation properties by frequency, see page 32
flex-circuit low profile solids
ULTRA-THIN WITH OPTIONAL ADHESIVE FOAM BASE. Solid
thin prole ferrite suppressors. Excellent for ex-circuits and tight
spaces. Various sizes can accommodate circuits up to 1.25”
(31,8mm). Adhesive foam
shock mount base
A
BC
D
E
A
BC
DE
low profile solids
ULTRA-THIN. Excellent for thin ex circuits and SCSI 2 at cables on
.025” (0,64mm) centers. Six sizes accommodate cable widths up to 2.00”
(50,8 mm).
28R0760 .760 19,3 .510 13,0 1.125 28,6 .300 7,6 .051 1,3 150 @ 100MHz
28R1127 1.125 28,6 .925 23,5 1.220 31,0 .303 7,7 .066 1,7 188 @ 100MHz
28R1127-2 1.125 28,6 .925 23,5 .980 24,9 .303 7,7 .066 1,7 151 @ 100MHz
28R1260 1.260 32,0 1.010 25,7 1.125 28,6 .300 7,6 .051 1,3 237 @ 100MHz
28R1575 1.575 40,0 1.325 33,7 1.125 28,6 .300 7,6 .051 1,3 160 @ 100MHz
28R1953 1.953 49,6 1.732 44,0 .472 12,0 .288 7,3 .059 1,5 109 @ 100MHz
28R2300 2.300 58,4 2.050 52,1 1.125 28,6 .300 7,6 .051 1,3 245 @ 100MHz
PART No. A B C D E
IMPEDANCE IN OHMS
rectangular solids
WITH OPTIONAL SHOCK-MOUNT ADHESIVE FOAM BASE. Solid
ferrite suppressors congured to accept at ribbon cables. Must be
installed prior to termination of the cable. High tack adhesive mounting
pad secures the cable routing to a xed point on almost any surface. Can
be stacked one on top of another. A variety of designs accommodate
special installation and insertion loss requirements.
A
BC
D
E
Adhesive foam
shock mount base
* Notated Versions Only
Adhesive foam
shock mount base
A
BC
D
E
28B0785 SM28B0785 .785 19,9 .515 13,1 1.100 27,9 .445 11,3 .145 3,7 170 @ 100MHz
28R1531* SM28R1531* 1.530 38,9 1.045 26,5 1.125 28,6 1.055 26,8 .510 13,0 196 @ 100MHz
28B1775 SM28B1775 1.775 45,1 1.355 34,4 1.125 28,6 .520 13,2 .060 1,52 293 @ 100MHz
28B1779 SM28B1779 2.500 63,5 2.050 52,1 1.125 28,6 .530 13,5 .066 1,68 295 @ 100MHz
28B1101 SM28B1101 1.101 28,0 .902 22,9 .577 14,7 .335 8,5 .059 1,5 133 @ 100MHz
28B1775-1 SM28B1775-1 1.775 45,1 1.355 34,4 .500 12,7 .520 13,2 .060 1,5 151 @ 100MHz
28B2170-1 SM28B2170-1 2.170 55,1 1.720 43,7 .500 12,7 .530 13,5 .050 1,3 176 @ 100MHz
28B2002 SM28B2002 2.394 60,8 2.000 50,8 .610 15,5 .724 18,4 .300 7,6 109 @ 100MHz
28B3149 SM28B3149 3.149 80,0 2.700 68,6 .500 12,7 .502 12,8 .075 1,9 93 @ 100MHz
PART No. w/Adhesive A B C D E
IMPEDANCE IN OHMS
FX28R0984-0 FX28R0984-0A .984 25,0 .709 18,0 .945 24,0 .303 7,7 .035 0,9 220 @ 100MHz
FX28R0984-2 FX28R0984-2A .984 25,0 .709 18,0 .630 16,0 .303 7,7 .035 0,9 170 @ 100MHz
FX28R1261-2 FX28R1261-2A 1.260 32,0 .988 25,1 .382 9,7 .303 7,7 .035 0,9 135 @ 100MHz
FX28R1450-1 FX28R1450-1A 1.450 36,8 1.165 29,6 .394 10,0 .303 7,7 .035 0,9 130 @ 100MHz
FX28R1457-4 FX28R1457-4A 1.457 37,0 1.299 33,0 .530 13,5 .177 4,5 .020 0,5 140 @ 100MHz
PART No. w/Adhesive A B C D E
IMPEDANCE IN OHMS
SM28R0760 .760 19,3 .510 13,0 1.125 28,6 .330 8,4 .051 1,3 150 @ 100MHz
SM28R1127 1.125 28,6 .925 23,5 1.220 31,0 .333 8,5 .066 1,7 188 @ 100MHz
SM28R1127-2 1.125 28,6 .925 23,5 .980 24,9 .303 8,5 .066 1,7 151 @ 100MHz
SM28R1260 1.260 32,0 1.010 25,7 1.125 28,6 .330 8,4 .051 1,3 237 @ 100MHz
SM28R1575 1.575 40,0 1.325 33,7 1.125 28,6 .330 8,4 .051 1,3 160 @ 100MHz
SM28R1953 1.953 49,6 1.732 44,0 .472 12,0 .318 8,1 .059 1,5 109 @ 100MHz
SM28R2300 2.300 58,4 2.050 52,1 1.125 28,6 .330 8,4 .051 1,3 245 @ 100MHz
PART No. A B C D E
IMPEDANCE IN OHMS
ULTRA-THIN WITH SHOCK MOUNT ADHESIVE FOAM BASE. Excellent for thin
ex circuits and SCSI 2 at cables on .025” (0,64mm) centers. Six sizes
accommodate cable widths up to 2.00” (50,8mm). High tack adhesive
mounting pad secures to almost any surface. Can be stacked one on top
of another.
low profile solids
28 material wideband ferrites- up to 1GHz applications
19
For attenuation properties by frequency, see page 32
28 material universal wideband up to 1GHz for PCB’s
HALF-TOROIDS AND HALF-BEADS WITH OR WITHOUT ADHESIVE
MOUNT BASE.
Absorbs RFI right at the source before resonance and harmonics
effects are transferred to neighboring components.
U-shaped with central opening extending directly to the outside radius
for easy mounting. By simply straddling a cable or PCB component,
a signicant amount of magnetic coupling occurs, between 30%-40%
of the impedance of our fully circumferential styles, depending on
conguration.
Excellent for quick, economical applications, tight spaces, electronic
enclosure cable routing, and especially direct mounting over leaded or
surface mount printed circuit board components. Attaches to any surface
with optional adhesive foam base or common electronic adhesives.
*
+
Optional adhesive mount base .030" (0,7mm) thick
Point of measured impedance (see impedance below)
HALF-TOROID
A
BC
E
D
adhesive
pad*
HALF-BEAD
A
BC
E
D
adhesive
pad*
PART No. PART No.
without with
Adhesive Mount Adhesive Mount
SB28B0550 SB28B0550AB
SB28B0617 SB28B0617AB
SB28B0642 SB28B0642AB
SB28B0805 SB28B0805AB
SB28B0937 SB28B0937AB
SB28B1123 SB28B1123AB
SB28B0984 SB28B0984AB
SB28B1251 SB28B1251AB
SB28B1501 SB28B1501AB
SB28B1500 SB28B1500AB
SB28B2000 SB28B2000AB
A B C D E TYPE IMPEDANCE IN OHMS (ref.)
.550 14,0 .107 2,7 .275 7,0 .214 5,4 1.105 28,0 half bead 100 @ 100MHz
.617 15,7 .138 3,5 .308 7,8 .276 7,0 1.125 28,6 half toroid 95 @ 100MHz
.642 16,3 .150 3,8 .341 8,7 .320 8,1 .630 16,0 half toroid 30 @ 100MHz
.805 20,4 .172 4,3 .402 10,2 .404 10,3 .394 10,0 half toroid 25 @ 100MHz
.937 23,8 .224 5,7 .468 11,9 .449 11,4 .551 14,0 half toroid 34 @ 100MHz
1.123 28,5 .271 6,9 .561 14,2 .543 13,8 1.125 28,6 half toroid 83 @ 100MHz
.984 25,0 .295 7,5 .492 12,5 .591 15,0 .472 12,0 half toroid 37 @ 100MHz
1.251 31,8 .375 9,5 .625 15,9 .750 19,1 .875 22,2 half toroid 50 @ 100MHz
1.500 38,1 .375 9,5 .750 19,1 .750 19,1 1.000 25,4 half toroid 80 @ 100MHz
1.500 38,1 .500 12,7 .750 19,1 1.000 25,4 1.000 25,4 half toroid 75 @ 100MHz
2.000 50,0 .500 12,7 1.000 25,4 1.000 25,4 1.500 38,1 half toroid 175 @ 100MHz
*
**
+
Optional adhesive bottom mount base .030" (0,7mm)
Optional adhesive top mount base .030" (0,7mm)
Point of measured impedance (see impedance below)
HALF-SLEEVE
A
B
C
E
D
top **
adhesive
bottom*
adhesive
RECTANGULAR PLATE
B
C
EA
D
top **
adhesive
bottom*
adhesive
SQUARE PLATE CEA
bottom*
adhesive
HALF-SLEEVES AND RECTANGULAR PLATES WITH OR WITHOUT
ADHESIVE MOUNT BASE.
Absorbs RFI right at the source before resonance and harmonics
effects are transferred to neighboring components.
Rectangular sleeves or plate shapes with central opening extending
outward to easily straddle a cable or PCB component, introducing a
signicant amount of magnetic coupling and impedance. Between
30% to 40% of the impedance of our fully enclosed styles, depending
on conguration.
When afxed with thermally conductive adhesive to at components,
such as semiconductors, heat sink thermal dissipation occurs,
increasing component efciency. Attaches to any surface with
optional adhesive foam base or common electronic adhesives.
SB28B2027AB .296 7,5 .048 1,2 .148 3,8 .096 2,4 .297 7,5 half sleeve 18 @ 100MHz
SB28B2034AB .445 11,3 .110 2,8 .200 5,1 .220 5,6 1.000 25,4 half sleeve 30 @ 100MHz
SB28B2031AB .536 13,6 .125 3,2 .270 6,9 .250 6,4 1.100 27,9 half sleeve 45 @ 100MHz
SB28B2030AB .638 16,2 .176 4,5 .319 8,1 .352 9,0 1.100 27,9 half sleeve 40 @ 100MHz
SB28B2041AB .800 20,3 .200 5,1 .400 10,2 .400 10,2 1.100 27,9 half sleeve 40 @ 100MHz
SB28B2032AB .965 24,5 .256 6,5 .492 12,5 .512 13,0 1.050 26,7 half sleeve 60 @ 100MHz
SB28B2035AB .965 24,5 .365 9,3 .492 12,5 .730 18,5 1.050 26,7 half sleeve 65 @ 100MHz
SB28B2039AB 1.400 35,5 .255 6,5 .700 17,8 .510 13,0 1.500 38,1 half sleeve 245 @ 100MHz
SB28B2043AB 1.400 35,5 .375 9,5 .700 17,8 .750 17,8 1.500 38,1 half sleeve 125 @ 100MHz
SB28B0010AB .325 8,3 .062 1,6 .163 4,1 .125 3,2 .600 15,2 half sleeve 20 @ 100MHz
SB28B0071AB .710 18,0 .030 0,7 .130 3,3 .510 13,0 .500 12,7 rectangular plate 23 @ 100MHz
SB28B0121AB 1.210 30,7 .030 0,7 .130 3,3 1.010 25,7 .500 12,7 rectangular plate 35 @ 100MHz
SB28B0146AB 1.460 37,1 .030 0,7 .130 3,3 1.260 32,0 .500 12,7 rectangular plate 30 @ 100MHz
SB28B0221AB 2.210 56,1 .030 0,7 .130 3,3 2.010 51,1 .500 12,7 rectangular plate 30 @ 100MHz
SB28B1729AB 1.729 43,9 .030 0,7 .250 6,4 1.355 34,4 1.125 28,6 rectangular plate 80 @ 100MHz
SB28B2375AB 2.350 59,7 .030 0,7 .250 6,4 1.720 43,7 1.000 25,4 rectangular plate 79 @ 100MHz
SB28B2480AB 2.500 63,5 .030 0,7 .250 6,4 2.047 52,0 1.125 28,6 rectangular plate 100 @ 100MHz
SB28B3012AB 3.000 76,2 .030 0,7 .250 6,4 2.540 64,5 1.125 28,6 rectangular plate 105 @ 100MHz
SB28B3500AB 3.500 86,5 .030 0,7 .250 6,4 3.000 76,2 1.125 28,6 rectangular plate 125 @ 100MHz
SB28B4340AB 4.340 110,2 .052 1,3 .250 6,4 3.240 82,3 1.125 28,6 rectangular plate 150 @ 100MHz
SB28B0500AB .500 12,7 N/A .250 6,4* N/A .500 12,7 square plate 25 @ 100MHz
SB28B0500-1AB
.500 12,7 N/A .100 2,5 N/A .500 12,7 square plate 10 @ 100MHz
SB28B0875AB .875 22,2 N/A .250 6,4* N/A .875 22,2 square plate 40 @ 100MHz
SB28B0875-1AB
.875 22,2 N/A .100 2,5 N/A .875 22,2 square plate 24 @ 100MHz
SB28B1055AB 1.055 26,8 N/A .250 6,4* N/A 1.055 26,8 square plate 65 @ 100MHz
SB28B1055-1AB
1.055 26,8 N/A .100 2,5 N/A 1.055 26,8 square plate 28 @ 100MHz
SB28B2100AB 2.100 53,3 N/A .250 6,4* N/A 2.100 53,3 square plate 130 @ 100MHz
SB28B2100-1AB
2.100 53,3 N/A .100 2,5 N/A 2.100 53,3 square plate 70 @ 100MHz
SB28B2027 SB28B2027AT
SB28B2034 SB28B2034AT
SB28B2031 SB28B2031AT
SB28B2030 SB28B2030AT
SB28B2041 SB28B2041AT
SB28B2032 SB28B2032AT
SB28B2035 SB28B2035AT
SB28B2039 SB28B2039AT
SB28B2043 SB28B2043AT
SB28B0010 SB28B0010AT
SB28B0071 SB28B0071AT
SB28B0121 SB28B0121AT
SB28B0146 SB28B0146AT
SB28B0221 SB28B0221AT
SB28B1729 SB28B1729AT
SB28B2375 SB28B2375AT
SB28B2480 SB28B2480AT
SB28B3012 SB28B3012AT
SB28B3500 SB28B3500AT
SB28B4340 SB28B4340AT
SB28B0500 N/A
SB28B0500-1 N/A
SB28B0875 N/A
SB28B0875-1 N/A
SB28B1055 N/A
SB28B1055-1 N/A
SB28B2100 N/A
SB28B2100-1 N/A
PART No.
with bottom*
Adhesive Mount A B C D E TYPE IMPEDANCE IN OHMS (ref.)
PART No. PART No.
without with top**
Adhesive Mount Adhesive Mount
* Thinner sizes at .063” 1,6 mm, available by special order.
®
saddle beads
saddle beads®
®
saddle beads
saddle beads®
20
For attenuation properties by frequency, see page 32
28 material bus bar ferrites – universal wideband up to 1GHz
EXTRA WIDE OPENING WITH ADHESIVE FOAM MOUNTING BASE.
All-purpose series of two sizes accommodate all bus bar widths up to
2.45” (62,2mm) and thicknesses up to .285” (6,5mm). Installs easily by
peeling protective paper liner from base.
EXTRA WIDE OPENING WITH OPTIONAL ADHESIVE MOUNTING.
Excellent for bus bar thicknesses up to .500” (12,7mm). Three sizes
accommodate bus bar widths up to 2.000” (50,8mm). Optional high tack
adhesive mounting secures to almost any surface. Can be stacked one
upon the other.
A
BC
D
E
Optional Adhesive pad .030 (0,76)
B
C
A
E
D
Adhesive pad
EXTRA WIDE OPENING WITH PRESS-FIT MOUNTING BASE. For bus
bar widths up to 2.45” (62,2mm) and thicknesses up to .285” (6,5mm).
Installs easily by pressing the integral spring tab fastener into a .250”
(6,4mm) diameter hole. Accommodates panel thicknesses up to.150”
(3,81mm).
B
C
A
.325" (8,3mm)
E
D
GF
rectangular solid bus bar ferrite
rectangular split ferrite bus bar clamp
rectangular split ferrite bus bar clamp
PART No. w/ adhesive A B C D E
IMPEDANCE IN OHMS
28B0785 SM28B0785 .785 19,9 .515 13,1 1.100 27,9 .415 10,5 .145 3,7 170 @ 100MHz
28R1531 SM28R1531 1.530 38,9 1.045 26,5 1.125 28,6 1.025 26,0 .510 13,0 196 @ 100MHz
28B2002 SM28B2002 2.394 60,8 2.000 50,8 .610 15,5 .694 17,6 .300 7,6 109 @ 100MHz
PART No. A B C D E
IMPEDANCE IN OHMS
FA28B2940 1.040 26,4 3.700 94,0 1.125 28,6 .290 7,3 2.500 63,5 160 @ 100MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
FF28B2440 1.040 26,4 3.180 80,8 1.125 28,6 .290 7,3 2.000 50,8 .390 9,9 .200 5,1 180 @ 100MHz
FF28B2940 1.040 26,4 3.700 94,0 1.125 28,6 .290 7,3 2.500 63,5 .390 9,9 .200 5,1 160 @ 100MHz
STANDARD CATALOG CABLE FERRITE ASSEMBLIES. Any of the
round or at cable clamps shown elsewhere in this catalog make a
perfectly good solution for many bus bar geometries and their mounting
requirements. A properly placed suppressor will attenuate unwanted
high frequency signals, thus negating the conductor and/or antenna-like
radiating effects at specic frequencies while not disturbing the power
distribution characteristics.
universal-fit clamps and sleeves
For situations where extremely high amounts of attenuation are needed.
Can be strapped longitudinally onto bus bars with common cable tie-wraps;
or, potting compounds can be used. Sandwiching the bus bar between
two shielding bars will dramatically increase impedance up to three times
the effect of a single bar depending on frequencies involved. Optional
adhesive pad facilitates mounting.
B
C
A
* Optional Adhesive pad .030 (0,76)
*
SB28B5630 SB28B5630A .365 9,3 5.630 143,0 1.00 25,4 one pass: 500 @ 100MHz
PART No. w/ adhesive A B C
IMPEDANCE IN OHMS
special purpose shielding bar
21
For attenuation properties by frequency, see page 32
33 material low frequency ferrites- up to 60MHz applications
Ferrite assembly in fully enclosed nylon case; functional with wires and
cables up to a 2.0” (50,8mm) diameter. Snap closed around wire by
clasping shut to position assembly.
May also be mounted with a at-head screw through the .120” (3,0mm)
diameter hole in the bottom by temporarily removing lower ferrite half.
Very effective from 1 MHz to 60 MHz; peak attenuation at 30 MHz.
See pages 32 and 33 for impedance curve characteristics.
A
D
CB
cable snap
Box-shaped ferrite assembly in enclosed nylon case. Various sizes are
functional with wires up to .500” (12,7mm) diameter. Simply clamp around
cable or wire; plastic tabs at entry/exit ports apply pressure to cable surface to
maintain mounting position. Options include foam adhesive pad on bottom.
Very effective from 1 MHz to 60 MHz; peak attenuation at 30 MHz.
See pages 32 and 33 for impedance curve characteristics. Optional Adhesive Pad .030 (0,76)
BC
F
A E D
Available in standard colors gray (i.e., SS33B2030) and black (i.e., SS33B2030K) Patent No. 5,764,125
PART No.
w/ Adhesive
A B C D E F
IMPEDANCE IN OHMS
SS33B2030 AS33B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5 23 @ 30MHz
SS33B2033 AS33B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5 23 @ 30MHz
SS33B2036 AS33B2036 1.155 29,3 1.250 31,8 1.125 28,6 .415 10,5 .350 8,9 1.230 31,2 27 @ 30MHz
SS33B2040 AS33B2040 1.155 29,3 1.250 31,8 1.125 28,6 .550 14,0 .480 12,2 1.230 31,2 27 @ 30MHz
sleeve snap
WITH VARIABLE DIAMETER END PORTS. Box-shaped ferrite assembly in
fully enclosed nylon case. End ports are surrounded with exible spring
utes to grip a range of cable diameters from .125” to .500” (3,2 to 12,7
mm). Special mounting options include foam adhesive pad on bottom.
Very effective from 1 MHz to 60 MHz; peak attenuation at 30 MHz.
See pages 32 and 33 for impedance curve characteristics.
Box-shaped ferrite assembly for cable bundle diameters up to .730”
(18,5mm) diameter. Allows single location for RFI suppression for multiple
cables. Each circuit reacts separately with the suppression material
without saturation. Alternatively, multiple turns of a single cable greatly
increases impedance depending on frequency - see page 6, gures 3 and
4. Optional adhesive mount base.
Very effective from 1 MHz to 60 MHz; peak attenuation at 30 MHz.
See pages 32 and 33 for impedance curve characteristics.
BC
F
A E D
Optional Adhesive Pad .030 (0,76)
Patent No. 5,003,278 and Patent No. 5,764,125
Available in standard colors gray (i.e., SS33B2037) and black (i.e., SS33B2037K)
PART No.
w/ Adhesive
A B (ref.) C D E F
IMPEDANCE IN OHMS
SS33B2037 AS33B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5 23 @ 30 MHz
SS33B2032 AS33B2032 1.155 29,3 1.450 36,8 1.125 28,6 .500 12,7 .200 5,1 1.230 31,2 27 @ 30 MHz
sleeve snap
sleeve snap for cable bundles
Ferrite assembly bonded to nylon strap; functional with wires and cables up
to a 1.00” (25,4 mm) diameter. Holes are provided for screw mounting.
Very effective from 1 MHz to 60 MHz; peak attenuation at 30 MHz.
See pages 32 and 33 for impedance curve characteristics.
AD
F
CB
E
PART No. A B C D E F
IMPEDANCE IN OHMS
TC33B0805 .948 24,1 .500 12,7 .948 24,1 .404 10,3 1.498 38,0 .195 5,0 22 @ 30MHz
TC33B0984 1.127 28,6 .500 12,7 1.127 28,6 .591 15,0 1.677 42,6 .195 5,0 20 @ 30MHz
TC33B2000 2.125 54,0 1.500 38,1 2.125 54,0 1.000 25,4 2.860 72,6 .281 7,1 210 @ 30MHz
cable clamp
B
A D
E
C
SS28B2035
1-hole
B
A
E
C
SS28B2035-2
2-holes
B
A
E
C
SS28B2035-3
3-holes
D
D
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
Optional Adhesive Pad .030 (0,76)
B
A
D
F
C
E
SS33B2035 AS33B2035 1.155 29,3 1.250 31,8 1.125 28,6 .790 20,1 .720 18,3 1.230 31,2 23 @ 30MHz
PART No.
w/ Adhesive
A B C D E F
IMPEDANCE IN OHMS
Available in standard colors gray (i.e., SS33B2035) and black (i.e., SS33B2035K)
PART No. A B C D IMPEDANCE IN OHMS
CS33B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 22 @ 30MHz
CS33B1984 1.218 30,9 .705 17,9 1.220 31,0 .525 13,3 20 @ 30MHz
CS33B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 see page 31 for more details 210 @ 30MHz
CS33B4000 4.500 114,2 1.851 47,0 4.687 110,0 1.960 49,8 see page 31 for more details 140 @ 30MHz
22
For attenuation properties by frequency, see page 32
33 material low frequency ferrites- up to 60MHz applications
WITH ADHESIVE MOUNT. Ferrite assembly bonded in nylon mounting
clamp; easily installed by peeling protective paper strip from base
and pressing into place. One size accommodates all at cables up to
40-conductor width.
Very effective from 1 MHz to 60 MHz with a peak attenuation at 30 MHz.
For typical impedance curve comparisons to other material formulations,
see page 33; and for specic impedance curves see page 32, bottom
B
C
A
E
D
Adhesive pad
flat cable clamp
FA33B2480 FC33B2480 .800 20,3 3.180 80,8 1.125 28,6 .060 1,5 2.047 52,0 31 @ 30 MHz
PART No. w/o Adhesive A B C D E
IMPEDANCE IN OHMS
WITH SINGLE PRESS FIT MOUNT. Ferrite assembly bonded in nylon
mounting clamp; easily installed by pressing the integral spring tab
fastener into a .250” (6,4mm) diameter hole. One size accommodates all
at cables up to 40-conductor width. Fits substrates up to .070” (1,8mm)
thickness.
Very effective from 1 MHz to 60 MHz with a peak attenuation at 30 MHz.
For typical impedance curve comparisons to other material formulations,
see page 33; and for specic impedance curves see page 32, bottom
WITH DUAL PRESS FIT MOUNTS. Ferrite assembly bonded in nylon
mounting clamp; easily installed by pressing the integral spring tab
fasteners into two .219” (5,6mm) diameter holes. One size accommodates
all at cables up to 40-conductor width. Fits substrates up to .070”
(1,8mm) thickness.
Very effective from 1 MHz to 60 MHz with a peak attenuation at 30 MHz.
For typical impedance curve comparisons to other material formulations,
page 33; and for specic impedance curves see page 32, bottom
flat cable clamp
flat cable clamp
FF33B2480 .800 20,3 3.180 80,8 1.125 28,6 .280 7,1 .183 4,6 2.047 52,0 .060 1,5 31 @ 30MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
flat cable clamp
WITH FULL OUTER ENCLOSURE AND ADHESIVE MOUNT. Ferrite assembly in
fully enclosed nylon case for at cables up to 64-conductor width. Internal grip-
lock tabs apply pressure on cable to maintain mounting position. Very effective
from 1 MHz to 60 MHz with a peak attenuation at 30 MHz. For typical impedance
curve comparisons to other material formulations, see page 33; and for specic
impedance curves see page 32, bottom.
Installs easily on any mounting surface by removing liner from foam adhesive
base pad. Also available without the adhesive mounting pad for assembly with
two at head screws through the .120” (3,0 mm) diameter holes on 1.25” (31,8
mm) centers in the bottom by temporarily removing the lower ferrite half.
A
Adhesive pad
B
C
D
E
A
Adhesive pad
B
C
D
E
PART No. w/o Adhesive A B C D E
IMPEDANCE IN OHMS
RA33B2480 RC33B2480 .700 17,8 2.76 70,1 1.312 33,3 .060 1,5 2.047 52,0 31 @ 30 MHz
RA33B4340 RC33B4340 .785 19,9 4.61 117,1 1.312 33,3 .104 2,6 3.240 82,3 79 @ 30 MHz
WITH SPLIT END CAPS, ADHESIVE MOUNT. Ferrite assembly press-
tted into a pair of nylon end caps with adhesive foam mounting pads.
Two sizes accommodate at cables up to 64-conductor width.
Very effective from 1 MHz to 60 MHz with a peak attenuation at 30 MHz.
For typical impedance curve comparisons to other material formulations,
see page 33; and for specic impedance curves see page 32, bottom
C
E
D
A
B
F
Adhesive pad
flat cable clamp
FD33B2480 .800 20,3 3.180 80,8 1.125 28,6 .280 7,1 .183 4,6 2.047 52,0 2.550 64,8 31 @ 30MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
SA33B2480 SE33B2480 .655 16,6 2.570 65,3 1.829 46,5 .060 1,5 .245 5,7 2.047 52,0 31 @ 30 MHz
SA33B4340 SE33B4340 .655 16,6 4.460 113,3 1.829 46,5 .104 2,6 .245 5,7 3.240 82,3 79 @ 30 MHz
PART No. w/o Adhesive A B C D E F
IMPEDANCE IN OHMS
B
C
A
.325" (8,3mm)
F
G
E
D
B
C
A
G
D
.060" (1,5mm)
F
.240" (6,1mm)
E
CS33B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 22 @ 30MHz
CS33B1984 1.218 30,9 .705 17,9 1.220 31,0 .525 13,3 20 @ 30MHz
CS33B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 see page 31 for more details 210 @ 30MHz
CS33B4000 4.500 114,2 1.851 47,0 4.687 110,0 1.960 49,8 see page 31 for more details 140 @ 30MHz
23
For attenuation properties by frequency, see page 32
25 material high frequency ferrites- 100MHz to 1 GHz applications
Ferrite assembly in fully enclosed nylon case; functional with wires and
cables up to a 2.0” (50,8mm) diameter. Snap closed around wire by
clasping shut to position assembly.
May also be mounted with a at-head screw through the .120” (3,0mm)
diameter hole in the bottom by temporarily removing lower ferrite half.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics.
A
D
CB
cable snap
Box-shaped ferrite assembly in enclosed nylon case. Various sizes are
functional with wires up to .500” (12,7 mm) diameter. Simply clamp around
cable or wire; plastic tabs at entry/exit ports apply pressure to cable surface to
maintain mounting position. Options include foam adhesive pad on bottom.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics. Optional Adhesive Pad .030 (0,76)
BC
F
A E D
Available in standard colors gray (i.e., SS25B2030) and black (i.e., SS25B2030K) Patent No. 5,764,125
PART No.
w/ Adhesive
A B C D E F
IMPEDANCE IN OHMS
SS25B2030 AS25B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5 390 @ 700MHz
SS25B2033 AS25B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5 390 @ 700MHz
SS25B2036 AS25B2036 1.155 29,3 1.250 31,8 1.125 28,6 .415 10,5 .350 8,9 1.230 31,2 510 @ 700MHz
SS25B2040 AS25B2040 1.155 29,3 1.250 31,8 1.125 28,6 .550 14,0 .480 12,2 1.230 31,2 510 @ 700MHz
sleeve snap
WITH VARIABLE DIAMETER END PORTS. Box-shaped ferrite assembly in
fully enclosed nylon case. End ports are surrounded with exible spring
utes to grip a range of cable diameters from .125” to .500” (3,2 to 12,7
mm). Special mounting options include foam adhesive pad on bottom.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics.
WITH SECURE INTERNAL LOCKING SYSTEM. Cannot be reopened after
snapping closed into position. Ensures that suppressor cannot be removed.
Grip-lock tabs at entry/exit ports prevent longitudinal slippage on a range
of cable diameters from .275” to .300” (7,0 to 7,6mm). Standard colors are
computer gray (PMS#413), computer beige (PMS#468), black and natural
white. A cost-effective alternative to over-molding.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics.
BC
F
A E D
Optional Adhesive Pad .030 (0,76)
Patent Nos. 5,003,278 , 5,162,772 and 5,764,125
IL25B0642W .780 19,8 .780 19,8 .780 19,8 .316 8,0 NATURAL WHITE 290 @ 700MHz
IL25B0642G .780 19,8 .780 19,8 .780 19,8 .316 8,0 COMPUTER GRAY 290 @ 700MHz
IL25B0642B .780 19,8 .780 19,8 .780 19,8 .316 8,0 COMPUTER BEIGE 290 @ 700MHz
IL25B0642K .780 19,8 .780 19,8 .780 19,8 .316 8,0 BLACK 290 @ 700MHz
PART No. A B (ref.) C D COLOR
IMPEDANCE IN OHMS
Patent No. 5,003,278 and Patent No. 5,764,125
Available in standard colors gray (i.e., SS25B2037) and black (i.e., SS25B2037K)
PART No.
w/ Adhesive
A B (ref.) C D E F
IMPEDANCE IN OHMS
SS25B2037 AS25B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5 390 @ 700 MHz
SS25B2032 AS25B2032 1.155 29,3 1.450 36,8 1.125 28,6 .500 12,7 .200 5,1 1.230 31,2 510 @ 700 MHz
sleeve snap
internal locking snap
Ferrite assembly bonded to nylon strap; functional with wires and cables up to a
1.00” (25,4 mm) diameter. Holes are provided for screw mounting.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics.
AD
F
CB
E
cable clamp
PART No. A B C D
IMPEDANCE IN OHMS
CS25B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 290 @ 700MHz
CS25B1937 1.182 30,0 .780 19,8 1.188 30,2 .425 10,8 305 @ 700MHz
CS25B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 510 @ 700MHz
CS25B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 see page 31 for more details 890 @ 700MHz
CS25B4000 4.500 114,2 1.851 47,0 4.687 110,0 1.960 49,8 see page 31 for more details 590 @ 700MHz
PART No. A B C D E F
IMPEDANCE IN OHMS
TC25B0642 .785 19,9 .630 16,0 .785 19,9 .320 8,1 1.335 33,9 .195 5,0 290 @ 700MHz
TC25B0937 1.127 28,6 .551 14,0 1.127 28,6 .449 11,4 1.677 42,6 .195 5,0 305 @ 700MHz
TC25B1500 1.628 41,4 1.000 25,4 1.628 41,4 1.000 25,4 2.150 55,5 .195 5,0 510 @ 700MHz
TC25B2000 2.125 54,0 1.500 38,1 2.125 54,0 1.000 25,4 2.860 72,6 .281 7,1 890 @ 700MHz
24
For attenuation properties by frequency, see page 32
25 material specific high frequency 700MHz peak for flat cables
WITH ADHESIVE MOUNT. Ferrite assembly bonded in nylon mounting
clamp; easily installed by peeling protective paper strip from base
and pressing into place. Two sizes accommodate all at cables up to
40-conductor width.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics.
B
C
A
E
D
Adhesive pad
flat cable clamp
FA25B0121 FC25B0121 .520 13,2 1.790 45,5 .750 19,1 .060 1,5 1.010 25,7 245 @ 700 MHz
FA25B2480 FC25B2480 .800 20,3 3.180 80,8 1.125 28,6 .060 1,5 2.047 52,0 790 @ 700 MHz
PART No. w/o Adhesive A B C D E
IMPEDANCE IN OHMS
WITH SINGLE PRESS FIT MOUNT. Ferrite assembly bonded in nylon
mounting clamp; easily installed by pressing the integral spring tab
fastener into a .250” (6,4mm) diameter hole. Two sizes accommodate all
at cables up to 40-conductor width. Fits substrates up to .070” (1,8mm)
thickness.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz. See
pages 32 and 33 for impedance curve characteristics.
WITH DUAL PRESS FIT MOUNTS. Ferrite assembly bonded in nylon
mounting clamp; easily installed by pressing the integral spring tab
fasteners into two .219” (5,6mm) diameter holes. One size accommodates
all at cables up to 40-conductor width. Fits substrates up to .070”
(1,8mm) thickness.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz. See
pages 32 and 33 for impedance curve characteristics.
flat cable clamp
flat cable clamp
FF25B0121 .475 12,7 1.790 45,5 .750 19,1 .325 8,3 .240 6,1 1.010 25,7 .060 1,5 245 @ 700MHz
FF25B2480 .800 20,3 3.180 80,8 1.125 28,6 .280 7,1 .183 4,6 2.047 52,0 .060 1,5 790 @ 700MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
flat cable clamp
WITH FULL OUTER ENCLOSURE AND ADHESIVE MOUNT. Ferrite
assembly in fully enclosed nylon case for at cables up to 40-conductor
width. Internal grip-lock tabs apply pressure on cable to maintain mounting
position. Very effective from 100 MHz to 1 GHz; peak attenuation at 700
MHz. See pages 32 and 33 for impedance curve characteristics.
Installs easily on any mounting surface by removing liner from foam
adhesive base pad. Also available without the adhesive mounting pad for
assembly with two at head screws through the .120” (3,0 mm) diameter
holes on 1.25” (31,8 mm) centers in the bottom by temporarily removing
the lower ferrite half. Excellent for ex-circuits.
A
Adhesive pad
B
C
D
E
A
Adhesive pad
B
C
D
E
PART No. w/o Adhesive A B C D E
IMPEDANCE IN OHMS
RA25B2480 RC25B2480 .700 17,8 2.76 70,1 1.312 33,3 .060 1,5 2.047 52,0 790 @ 700 MHz
RA25B4340 RC25B4340 .785 19,9 4.61 117,1 1.312 33,3 .104 2,6 3.240 82,3 930 @ 700 MHz
WITH SPLIT END CAPS, ADHESIVE MOUNT. Ferrite assembly press-tted
into a pair of nylon end caps with adhesive foam mounting pads. Two sizes
accommodate at cables up to 40-conductor width.
Very effective from 100 MHz to 1 GHz; peak attenuation at 700 MHz.
See pages 32 and 33 for impedance curve characteristics.
C
E
D
A
B
F
Adhesive pad
flat cable clamp
FD25B2480 .800 20,3 3.180 80,8 1.125 28,6 .280 7,1 .183 4,6 2.047 52,0 2.550 64,8 790 @ 700MHz
PART No. A B C D E F G
IMPEDANCE IN OHMS
SA25B0121 SE25B0121 .405 10,3 1.315 33,4 1.190 30,2 .060 1,5 .245 5,7 1.010 25,7 245 @ 700 MHz
SA25B2480 SE25B2480 .655 16,6 2.570 65,3 1.829 46,5 .060 1,5 .245 5,7 2.047 52,0 790 @ 700 MHz
SA25B4340 SE25B4340 .655 16,6 4.460 113,3 1.829 46,5 .104 2,6 .245 5,7 3.240 82,3 930 @ 700 MHz
PART No. w/o Adhesive A B C D E F
IMPEDANCE IN OHMS
B
C
A
.325" (8,3mm)
F
G
E
D
B
C
A
G
D
.060" (1,5mm)
F
.240" (6,1mm)
E
25
For attenuation properties by frequency, see page 32
20 material microwave/bluetooth™ ferrites- 2.45GHz applications
Box-shaped ferrite assembly in enclosed nylon case. Various sizes are functional
with wires up to .400” (10,2 mm) diameter. Simply clamp around cable or wire;
plastic tabs at entry/exit ports apply pressure to cable surface to maintain mounting
position. Options include foam adhesive pad on bottom.
Optional Adhesive Pad .030 (0,76)
BC
F
A E D
Available in standard colors gray (i.e., SS20B2030) and black (i.e., SS20B2030K) Patent No. 5,764,125
PART No.
w/ Adhesive
A B C D E F
SS20B2030 AS20B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5
SS20B2033 AS20B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5
SS20B2041 AS20B2041 .965 24,5 1.285 32,6 .930 23,6 .450 11,4 .380 9,7 1.035 26,3
sleeve snap
WITH VARIABLE DIAMETER END PORTS. Box-shaped ferrite assembly in
fully enclosed nylon case. End ports are surrounded with exible spring
utes to grip a range of cable diameters from .125” to .400” (3,2 to 10,2
mm). Special mounting options include foam adhesive pad on bottom.
BC
F
A E D
Optional Adhesive Pad .030 (0,76)
Patent No. 5,003,278 and Patent No. 5,764,125
Available in standard colors gray (i.e., SS28B2034) and black (i.e., SS28B2034K)
PART No.
w/ Adhesive
A B (ref.) C D E F
SS20B2034 AS20B2034 .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3
SS20B2037 AS20B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5
SS20B2042 AS20B2042 .965 24,5 1.480 37,6 .930 23,6 .425 10,8 .170 4,3 1.035 26,3
sleeve snap
solid beads
Sizes up to .430” I.D. (10,9 mm) for applications where it is possible to
assemble the ferrite suppressor before the cable ends are terminated.
A
C
B
PART No. A B C
20B0562-2 1.125 28,6 .562 14,2 .250 6,4
20B0736-0 1.125 28,6 .736 18,7 .430 10,9
Ferrite assembly in fully enclosed nylon case; functional with wires and
cables up to a 2.0” (50,8mm) diameter. Snap closed around wire by
clasping shut to position assembly.
May also be mounted with a at-head screw through the .120” (3,0mm)
diameter hole in the bottom by temporarily removing lower ferrite half.
cable snap for cable bundles
PART No. A B C D
CS20B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4
CS20B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4
CS20B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8
Ferrite assembly bonded to nylon strap; functional with wires and cables up to a
1.00” (25,4 mm) diameter. Holes are provided for screw mounting.
TC20B1500 1.628 41,4 1.000 25,4 1.628 41,4 1.000 25,4 2.150 55,5 .195 5,0
TC20B2000 2.125 54,0 1.500 38,1 2.125 54,0 1.000 25,4 2.860 72,6 .281 7,1
PART No. A B C D E F
cable clamp for cable bundles
A
D
CB
AD
F
C B
E
Bluetooth™ is a proprietary trademark of L.M. Ericsson & Co., Inc.
26
For attenuation properties by frequency, see page 32
20 material microwave/bluetooth™ ferrites- 2.45GHz applications
WITH ADHESIVE MOUNT. Ferrite assembly bonded in nylon mounting
clamp; easily installed by peeling protective paper strip from base and
pressing into place. For at cables up to 40-conductor width 2.00” (50,8
mm).
B
C
A
E
D
Adhesive pad
flat cable clamp
FA20B1729 FC20B1729 .800 20,3 2.430 61,7 1.125 28,6 .060 1,5 1.355 34,4
FA20B2480 FC20B2480 .800 20,3 3.180 80,8 1.125 28,6 .060 1,5 2.047 52,0
PART No. w/o Adhesive A B C D E
WITH SPLIT END CAPS, ADHESIVE MOUNT. Ferrite assembly press-
tted into a pair of nylon end caps with adhesive foam mounting pads. For
at cables up to 40-conductor width 2.00” (50,8 mm).
C
E
G
D
A
B
F
Adhesive pad
PART No. w/o Adhesive A B C D E F G
SA20B1729 SE20B1729 .655 16,6 1.849 47,0 1.829 46,5 .060 1,5 .245 5,7 1.355 34,4 .125 3,2
SA20B2480 SE20B2480 .655 16,6 2.570 65,3 1.829 46,5 .060 1,5 .245 5,7 2.047 52,0 .125 3,2
flat cable clamp
flat cable clamp
WITH FULL OUTER ENCLOSURE AND ADHESIVE MOUNT. Ferrite
assembly in fully enclosed nylon case. Two sizes functional with at
cables up to 40-conductor widths. Internal grip-lock tabs apply pressure
on cable to maintain mounting position.
Installs easily on any mounting surface by removing liner from foam
adhesive base pad. Excellent for ex-circuits. A
Adhesive pad
B
C
D
E
A
Adhesive pad
B
C
D
E
PART No. w/o Adhesive A B C D E
RA20B1729 RC20B1729 .700 17,8 2.03 51,6 1.312 33,3 .060 1,5 1.355 34,4
RA20B2480 RC20B2480 .700 17,8 2.76 70,1 1.312 33,3 .060 1,5 2.047 52,0
Adhesive foam
shock mount base
A
BC
D
E
SM20R1260 1.260 32,0 1.010 25,7 1.125 28,6 .330 8,4 .051 1,3
SM20R1575 1.575 40,0 1.325 33,7 1.125 28,6 .330 8,4 .051 1,3
PART No. A B C D E
ULTRA-THIN WITH SHOCK MOUNT ADHESIVE FOAM BASE. Excellent for thin
ex circuits and at cables. Two sizes accommodate cable widths up to
1.325” (33,7mm). High tack adhesive mounting pad secures to almost any
surface. Can be stacked one on top of another.
low profile solids
A
BC
DE
low profile solids
ULTRA-THIN. Excellent for thin ex circuits and at cables. Two sizes
accommodate cable widths up to 1.325” (33,7 mm).
PART No. A B C D E
20R1260 1.260 32,0 1.010 25,7 1.125 28,6 .300 7,6 .051 1,3
20R1575 1.575 40,0 1.325 33,7 1.125 28,6 .300 7,6 .051 1,3
Bluetooth™ is a proprietary trademark of L.M. Ericsson & Co., Inc.
27
For attenuation properties by frequency, see page 32
RFID frequency-specific shielding
Parameters CTM030 CTM032
Fields Electric Magnetic
Frequency Response 2MHz - 2GHz 1MHz - 1GHz
RF Output Yes Yes
DC Output to a multimeter Yes Yes
Sensitivity (typical) -10dBm/(V/m) -20dBm/mA
Connector SMB/BNC SMB/BNC
Dimensions (approx.) 6.18” x 1.21” x 0.76” (157 x 31 x 20mm) 6.18” x 1.21” x 0.76” (157 x 31 x 20mm)
Weight (approx.) 2.25oz (65g) 2.25oz (65g)
Battery (included) 2 x AAA 2 x AAA
LED Bar Graph 5 LED color bar 5 LED color bar
Audio Indication Speaker (tone pitch proportional to the eld strength)
CTK031 W/ BOTH PROBES PROBE PROBE
CTK031
– SCAN EM-C PROBE SET WITH DEMO FIXTURE
Contains both CTM030 electric and CTM032 magnetic near-eld probes along with a step-by-step
guide, an EMC Demo Fixture, and cables with adapters for spectrum analyzer, oscilloscope or
multimeter. Free ferrite engineering kit included. See information at lower right.
FREE #EK28B0032 FERRITE
ENGINEERING KIT WITH EITHER
ScanEM PROBE KIT PURCHASE
Our popular, wideband assortment of
32 unique congurations for RFID EMI
cable suppression.
3-Steps to Reducing RFID Interference
Radio Frequency Identication (RFID) is a rapidly expanding technology with new
applications emerging at a remarkable rate. From management of warehouse inventory
to identication of patients in a medical setting, proper deployment and unimpeded
communication between RFID readers and tags is paramount to successful
operation.
One of the major considerations when implementing an RFID system is
the effect of unwanted RF interference between Readers and Tags. Most
workplaces have hundreds if not thousands of electronic devices that
create unwanted interference, including computers, Bluetooth networks,
wireless networks, motors, conveyors and robots. Actually, any device with
a microchip and power cord or cable will emit RF energy which can interfere
with the ability of the reader to receive a clean signal.
Leader Tech offers a simple “rst-step” approach to reducing unwanted RF interference.
We recommend the following:
Identify Sources of RFID Interferences
The FerriShield CTK031 hand-held probe (see below) is one of the easiest ways to identify unwanted
electro-magnetic interference. All you need to do is pass the probe over suspect sources. If the device
detects RF emissions it alerts with an audible tone that intensies as interference increases.
Attach a Frequency-Specific RFID Ferrite to the Suspect Device
Samplings of our most popular RFID ferrites are shown on the following page. In addition, a free 32-piece
engineering kit is provided with the purchase of any CTK031 Probe.
Check If Interference Has Been Eliminated
After you have attached the cable-mounted ferrite, simply use the hand-held RF probe to conrm that the
ferrite has eliminated the unwanted interference.
28
For attenuation properties by frequency, see page 32
RFID frequency-specific ferrites
SS28B2030 AS28B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5 13.56MHz 200 @ 100MHz
SS28B2033 AS28B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5 13.56MHz 200 @ 100MHz
SS28B2041 AS28B2041 .965 24,5 1.285 32,6 .930 23,6 .450 11,4 .380 9,7 1.035 26,3 13.50MHz 238 @ 100MHz
SS25B2030 AS25B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5 433.92MHz & 860-930MHz 340 @ 700MHz
SS25B2033 AS25B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5 433.92MHz & 860-930MHz 290 @ 700MHz
SS20B2030 AS20B2030 .790 20,1 1.265 32,1 .770 19,6 .270 6,9 .220 5,6 .885 22,5 2.45GHz per application
SS20B2033 AS20B2033 .790 20,1 1.265 32,1 .770 19,6 .350 8,8 .290 7,4 .885 22,5 2.45GHz per application
SS20B2041 AS20B2041 .965 24,5 1.285 32,6 .930 23,6 .450 11,4 .380 9,7 1.035 26,3 2.45GHz per application
PART No. w/adhesive A B C D E F Target Frequency/Range Impedance in Ohms
SS28B2034 AS28B2034 .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3 13.56MHz 220 @ 100MHz
SS28B2037 AS28B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5 13.56MHz 200 @ 100MHz
SS28B2042 AS28B2042 .965 24,5 1.480 37,6 .930 23,6 .425 10,8 .170 4,3 1.035 26,3 13.56MHz 238 @ 100MHz
SS28B2032 AS28B2032 1.155 29,3 1.450 36,8 1.125 28,6 .500 12,7 .200 5,1 1.230 31,2 13.56MHz 238 @ 100MHz
SS25B2037 AS25B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5 433.92MHz & 860-930MHz 390 @ 700MHz
SS25B2032 AS25B2032 1.155 29,3 1.450 36,8 1.125 28,6 .500 12,7 .200 5,1 1.230 31,2 433.92MHz & 860-930MHz 510 @ 700MHz
SS20B2034 AS20B2034 .585 14,9 1.250 31,8 .585 14,9 .250 6,4 .120 3,0 .680 17,3 2.45GHz per application
SS20B2037 AS20B2037 .790 20,1 1.450 36,8 .770 19,6 .350 8,8 .200 5,1 .885 22,5 2.45GHz per application
SS20B2042 AS20B2042 .965 24,5 1.480 37,6 .930 23,6 .425 10,8 .170 4,3 1.035 26,3 2.45GHz per application
PART No. w/adhesive A B(ref.) C D E F Target Frequency/Range Impedance in Ohms
RC28B1729 RA28B1729 .670 17,0 2.030 51,6 1.312 33,3 .060 1,5 1.355 34,4 13.56MHz 200 @ 100MHz
RC28B2480 RA28B2480 .670 17,0 2.760 70,1 1.312 33,3 .060 1,5 2.047 52,0 13.56MHz 250 @ 100MHz
RC28B3012 RA28B3012 .670 17,0 3.260 82,8 1.312 33,3 .060 1,5 2.540 64,5 13.56MHz 286 @ 100MHz
RC28B4340 RA28B4340 .755 19,2 4.610 117,1 1.312 33,3 .104 2,6 3.240 82,3 13.56MHz 325 @ 100MHz
RC25B2480 RA25B2480 .700 17,8 2.760 70,1 1.312 33,3 .060 1,5 2.047 52,0 433.92MHz & 860-930MHz 390 @ 700MHz
RC25B4340 RA25B4340 .785 19,9 4.610 117,1 1.312 33,3 .104 2,6 3.240 82,3 433.92MHz & 860-930MHz 510 @ 700MHz
RC20B1729 RA20B1729 .700 17,8 2.030 51,6 1.312 33,3 .060 1,5 1.355 34,4 2.45GHz per application
RC20B2480 RA20B2480 .700 17,8 2.760 70,1 1.312 33,3 .060 1,5 2.047 52,0 2.45GHz per application
PART No. w/adhesive A B C D E Target Frequency/Range Impedance in Ohms
CS28B1642 CA28B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 13.56MHz 100 @ 100MHz
CS28B1805 CA28B1805 1.040 26,4 .667 16,9 1.025 26,4 .340 8,6 13.56MHz 73 @ 100MHz
CS28B1937 CA28B1937 1.182 30,0 .780 19,6 1.188 30,2 .425 10,8 13.56MHz 117 @ 100MHz
CS28B1984 CA28B1984 1.218 30,9 .705 17,9 1.220 31,0 .525 13,3 13.56MHz 62 @ 100MHz
CS28B1501 CA28B1501 1.725 43,8 1.232 31,3 1.720 43,7 .710 18,0 13.56MHz 177 @ 100MHz
CS28B1500 CA28B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 13.56MHz 133 @ 100MHz
CS28B2000 CA28B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 details on page 31 13.56MHz 380 @ 100MHz
CS28B4000 CA28B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 details on page 31 13.56MHz 290 @ 100MHz
CS25B1642 CA25B1642 .852 21,6 .885 22,5 .840 21,3 .282 7,2 433.92MHz & 860-930MHz 290 @ 700MHz
CS25B1937 CA25B1937 1.182 30,0 .780 19,6 1.188 30,2 .425 10,8 433.92MHz & 860-930MHz 305 @ 700MHz
CS25B1500 CA25B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 433.92MHz & 860-930MHz 570 @ 700MHz
CS25B2000 CA25B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 details on page 31 433.92MHz & 860-930MHz 890 @ 700MHz
CS25B4000 CA25B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 details on page 31 433.92MHz & 860-930MHz 590 @ 700MHz
CS20B1500 CA20B1500 1.725 43,8 1.232 31,3 1.720 43,7 .960 24,4 2.45GHz per application
CS20B2000 CA20B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 details on page 31 2.45GHz per application
CS20B4000 CA20B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 details on page 31 2.45GHz per application
PART No. w/adhesive A B C D Target Frequency/Range Impedance in Ohms
Three common sizes in three frequency-specic formulations. Box-
shaped assembly snaps over cables up to .400” (10,1mm) diameter.
Optional foam adhesive mounting pad on bottom. Optional Adhesive Pad .030 (0,76)
BC
F
A E D
WITH VARIABLE DIAMETER END PORTS.
Four sizes t cable diameters
from .125” to .500” (3,2 to 12,7mm); end ports are surrounded by exible
spring utes to grip a range of diameters. Three choices of frequency-
specic material formulations. Optional foam adhesive mounting pad on
bottom.
BC
F
A E D
Optional Adhesive Pad .030 (0,76)
sleeve snap for round cables
sleeve snap for round cables
Ferrite assembly in fully enclosed nylon case; functional with cables and
bundles up to a 2.0” (50,8mm) diameter. Three choices of frequency-
specic material formulations. Optional foam adhesive mounting pad on
bottom.
A
D
CB
*Optional Adhesive .030” (0,76)
cable snap for round cables
flat cable clamp for flat cables
WITH OPTIONAL ADHESIVE MOUNTING.
Ferrite assembly clamps over at
cables up to 64-conductor widths 3.24” (82,3mm). Optional adhesive pad
mounts on bottom; or, may be mounted with at-head screws through the
.120” (3,0mm) diameter holes on 1.25” (31,8mm) centers in the bottom by
temporarily removing the lower ferrite half. A
B
C
D
E
*Optional Adhesive .030” (0,76)
29
For attenuation properties by frequency, see page 32
®
saddle beads
engineering kits
engineering kit #EK25B0012, high frequency 700MHz peak
BISECTED FERRITES FOR APPLICATIONS UP TO 1 GHz WITH PEAK PROPERTIES AT 700MHz.
Sample assortment of ten popular stock items manufactured in our newest #25 high frequency
material. Effective to 1.2 GHz with peak properties at 700 MHz.
Contains part numbers TC25B0642, TC25B0937, CS25B1642, SA25B0121, CV25B1937,
FA25B2480, SS25B2033, SS25B2032, SS25B2037, SS25B2036. Other sizes available on a
special order basis.
See catalog pages 24 and 25 for all items available from stock for immediate delivery. Most other
catalog items are also available in this material on special order basis.
saddle beads® engineering kit #EK28B27SB
FERRITES FOR APPLICATIONS UP TO 1 GHz WITH PEAK PROPERTIES AT 250MHz.
A wide variety of common sizes of our unique half-toroid, half-bead, half-sleeve and plate shapes
for round wire, at wire and PC board components. Manufactured in the most frequently used
universal #28 wideband material formulation for all applications up to 1 GHz.
See catalog page 20 for all items available from stock for immediate delivery.
engineering kit #EK28B0032
BISECTED FERRITES FOR APPLICATIONS UP TO 1 GHz WITH PEAK PROPERTIES AT 250MHz.
Our most popular engineering kit! Contains a large assortment of various sizes of ferrite assemblies
from catalog pages 10 through 21. Manufactured in the most frequently used universal #28
wideband material formulation for all applications up to 1 GHz.
All catalog items are in stock at all times for immediate delivery.
engineering kit #EK28B0021
SOLID FERRITES FOR APPLICATIONS UP TO 1 GHz WITH PEAK PROPERTIES AT 250MHz.
Sample assortment of twenty cylindrical and at solid ferrite suppressors in universal #28
wideband material formulation for applications up to 1 GHz. Contains many of the cylindrical and
at rectangular designs shown on pages 15 and 19, including the “SM” shock mount versions.
See catalog pages 15 and 19 for all items available from stock for immediate delivery.
engineering kit #EK33B0011, low frequency 30MHz peak
BISECTED FERRITES FOR APPLICATIONS FROM 1 TO 30MHZ WITH PEAK PROPERTIES AT 30MHz.
Sample assortment containing nine of the most common congurations of ferrite assemblies
manufactured in #33 material formulation. Specically applicable in the 1-30 MHz range.
Contains part numbers TC33B0805, TC33B0984, CS33B1805, CV33B1984, FA33B2480,
SS33B2033, SS33B2037, SS33B2032, SS33B2036. Other sizes available on a special order
basis.
See catalog pages 22 and 23 for all items available from stock for immediate delivery. Most other
catalog items are also available in this material on special order basis.
Free replacement of any engineering kit parts for as long as you own the kit.
Bluetooth™ is a proprietary trademark of L.M. Ericsson & Co., Inc.
engineering kit #EK20B0009, Bluetooth™
BISECTED AND SOLID FERRITES FOR APPLICATIONS CONCERNED WITH 2.45GHZ OPERATIONS.
Sample assortment of nine popular stock items manufactured in #20 material formulation.
Specically applicable in the 2.45GHz frequency area.
Contains part numbers 20B0562-2, 20B0736-0, 20R1260, 20R1575, FA20B2480, SS20B2034,
SS20B2037, SS20B2033, SS20B2042.
See catalog pages 26 and 27 for all items available from stock for immediate delivery. Most other
catalog items are also available in this material on special order basis.
30
For attenuation properties by frequency, see page 32
CS28B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 #28 formulation 380 @ 100MHz
CS33B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 #33 formulation 210 @ 30MHz
CS25B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 #25 formulation 890 @ 700MHz
CS20B2000 2.350 59,7 1.851 47,0 2.309 58,6 .960 24,4 #20 formulation per application
PART No. A B C D MATERIAL IMPEDANCE IN OHMS
rfi-emi testing aids
suppression prototyping
Your lab is not complete without a selection of ferrite RFI-EMI suppressors on hand. Helpful
during engineering evaluations, prototyping, emergencies, and eventually for nal product
compliance testing and documentation.
The engineering kits shown on page 30 contain a wide assortment of sizes, congurations and
suppression levels for any insertion loss requirements.
The test xtures shown below are indispensable problem-solving aids, useful in any
laboratory.
When extra samples are required for your project, just a phone call to our customer service
department will have them immediately on the way to you.
empirical test fixtures
– WITH QUICK-RELEASE STRAP
A handy R&D/test device for determining if a ferrite suppressor is
feasible in a given situation. With this massive amount of insertion loss
material applied to a circuit, a rough estimate of attenuation effect can
be previewed. Afterwards, a properly congured ferrite assembly can be
determined. Install on any cable data signal circuit by reassembling ferrite
halves within the plastic strap. Even at ribbon cables pass through the
large opening. Available in our four standard material formulas.
A
D
CB
C
A
D
B
empirical test fixtures
– IN FULLY ENCLOSED PLASTIC CASE
Another variation of the test xture shown above – the same ferrite core
encased in a heavy-duty hinged nylon plastic enclosure. A handy R&D/
test device for determining if a ferrite suppressor is feasible in a given
situation. With this massive amount of insertion loss material applied
to a circuit, a rough estimate of attenuation effect can be previewed.
Afterwards, a properly congured ferrite assembly can be determined.
Install on any cable data signal circuit by clamping around the cable.
Even at ribbon cables pass through the large opening. Available in our
four standard material formulas.
ET28B2000 2.53 64,3 1.50 38,1 2.00 50,8 1.00 25,4 #28 formulation 380 @ 100MHz
ET33B2000 2.53 64,3 1.50 38,1 2.00 50,8 1.00 25,4 #33 formulation 210 @ 30MHz
ET25B2000 2.53 64,3 1.50 38,1 2.00 50,8 1.00 25,4 #25 formulation 890 @ 700MHz
ET20B2000 2.53 64,3 1.50 38,1 2.00 50,8 1.00 25,4 #20 formulation per application
PART No. A B C D MATERIAL IMPEDANCE IN OHMS
empirical test fixture
– FOR FLAT CABLES AND FLEX-
CIRCUITS
A high impedance R&D/test device for determining if a ferrite suppressor
is feasible in a given situation. Specically for at cables and ex-circuits,
with this massive amount of insertion loss material applied to a circuit the
attenuation effect of the wideband ferrite core material can be previewed.
Afterwards, a properly congured ferrite assembly can be determined.
Installs on any cable data signal circuit up to 50-conductors by engaging
the double clamps; quick-release design opens easily. Adhesive foam
pads on bottom allow permanent mounting if desired. Available in our
standard #28 wideband formula for frequencies from 10 MHz to 1 GHz.
B
C
A
E
D
Adhesive pad
ET28B3000 .800 20,3 3.700 94,0 1.500 38,1 .060 1,5 2.540 64,5 370 @ 100MHz
PART No. A B C D E
IMPEDANCE IN OHMS
Bluetooth™ is a proprietary trademark of L.M. Ericsson & Co., Inc.
CS28B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 #28 formulation 290 @ 100MHz
CS33B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 #33 formulation 140 @ 30MHz
CS25B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 #25 formulation 590 @ 700MHz
CS20B4000 4.500 114,2 1.851 47,0 4.687 119,0 1.960 49,8 #20 formulation per application
PART No. A B C D MATERIAL IMPEDANCE IN OHMS
A
D
CB
special purpose large toroid clamp
IN FULLY ENCLOSED PLASTIC CASE WITH 2.0” (50,8mm) I.D.
Similar to other “CS” Empirical Test Fixtures above, except with a
4.0” 101,6mm O.D. and a 2.0” 50,8mm I.D. ferrite core. Available
in four standard material formulas.
31
rfi-emi technical data
IMPEDANCE VS. FREQUENCY-#28 MATERIAL.
The #28 formulation of suppression material is our most common product. It is an excellent wideband general purpose insertion loss absorber for
frequencies from 10 MHz up to 1 GHz.
All of the impedance data below applies to the FerriShield® series which are specied by “28B” or the following alpha prexes: TC, CS, CA, CW, CF,
CV, FA, FF, FD, FX, IL, BA, BC, ET, SE, SA, PM, JB, CG, UG, HF, HI, HW, HA, SM, WC, CC, AC, PC, HC, HD, RC, RA, SF, SD, SS and USB. For
specic performance by part number, nd the alpha-numeric designation on the charts below according to the last seven digits of each catalog part
number; i.e., for part number “CS28B1937” see “28B1937” on the chart.
IMPEDANCE VS. FREQUENCY-#33 MATERIAL.
The #33 formulation of suppression material is specically applicable from 1 to 30
MHz with a decreasing effect beyond that range. The part numbers shown below are
standard items available from stock and are the most commonly used congurations
for those frequencies. Other sizes are available by special order.
All of the impedance data below applies to the FerriShield® series which are specied
by “33B” or the following alpha prexes: TC, CS, CA, CW, CF, CV, FA, FF, FD, ET,
RC, RA, SE, SA and SS. For specic performance by part number, nd the alpha-
numeric designation on the charts below according to the last seven digits of each
catalog part number, i.e. for part number “SS33B2032” see “33B2032” on the chart.
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B2035-15
28B2032/2036/2040/2034
28B2030/2033/2037/2031
28B2035
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B0385-2
28B4340
28B3012/3500/0550
28B2480/1240
28B1729
28R1127
28B0010/2940
28R1953
28B0300-0
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B2000
28B2043/2044
28R1260
28B0937/1937
28B0642/1642/0350-0
28B0805/1805
28B0984/1984
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B0200-4
28B0138-7
28B1123
28B0137-3/0355-0
28B0250-1/1500
28B0999/0500
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B1625-1/28R0984-2
28B0686/0736-0
28R1575/2300
28B3375/1251/0765
28B0625-0/0146/0563
28B1417-0/2400-0
28B0870-0
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B2000-3
28B0626-0
28B0562-2
28B0686-2
28B1250-2/1775-1/1265
28R1261-2/1450-1/1457-4
28B2027
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B2038/2039
28B1775/4000
28B1531/0735/2375
28R1127/1501/0672-0
28R0760/2265
28B0121/1225-0
28B1101
28B0071
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B3000
28B2500
28B1020
28B0736/2170-1/0221
28B1785
28B1387
28B1102-1/1127-2
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
28B1779/0617
28B2041/2042/2035-2
28R0984-0
28B0785/1501/2440
0625-0/0375-3
28B2002/1953
28B3149
28B2035-3
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
33B2000
33B4000
33B2030/2033/2037
33B0805/1805
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
33B2032/2036/2040
33B4340
33B0984/1984
�33B2035
33B2480
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
25B2000/25B4340
25B2480
25B2032/2036/2040/4000
25B1500
25B2030/2033/2037
25B0937/1937
25B0642/1642
25B0121
IMPEDANCE VS. FREQUENCY-#25 MATERIAL.
The #25 formulation of suppression material is designed
to address frequencies resulting from microprocessor
speeds above 100MHz and harmonics peak interference
at 700MHz with some attenuation effect up to 1.2GHz.
Most of the product styles in this catalog are available by
special order within a convenient lead time.
Impedance data for standard stock items is shown
below. They are available in the component assemblies
with the following alpha prexes: TC, CS, CA, CW, CF,
CV, FA, FF, FD, ET, RC, RA, SE, SA, IL and SS.
All attenuation data is derived from tests using an HP4191A attenuation analyzer with spring clip or binding post xturing, and does not include the test wire resistance.
All impedance readings are shown at nominal ±10% at 3 standard deviations from the mean.
Attenuation Properties by Part Number
32
rfi-emi technical data
INITIAL PERMEABILITY vs TEMPERATURE
5000
4000
3000
2000
1000
0
33
28
25
20
LOSS FACTOR vs FREQUENCY
FREQUENCY (Hz)
104
10-1
10-2
10-3
10-4
10-5
108
105106107109
25
20
28
33
INITIAL PERMEABILITY vs FREQUENCY
FREQUENCY (Hz)
104105106107
3000
2500
2000
1500
1000
500
0
33
25
20
28
TYPICAL PERFORMANCE
FREQUENCY (Hz)
1M 10M 100M 1G
1000
100
10
1
850 Permeability ( i)
#28 Ferrite (Popular,
universal formula)
125 Permeability ( i)
#25 Ferrite (Specific,
high-frequency formula)
20 Permeability ( i)
#20 Ferrite (Microwave
formula)
2700 Permeability ( i)
#33 Ferrite (Specific,
low-frequency formula)
Material Properties
CABLE SIZE BY PART NUMBER The maximum recommended cable size or cable bundle diameter is shown below for each part number. A
range of sizes indicates that the suppressor has a variable opening.
U.L.RECOGNIZED All plastic and adhesive components use U.L. recognized materials with a ammability rating of UL94V-0, UL94V-2 or UL94HB.
USB 2035-3 3 holes ea. @ .203 5,2 dia.
2030 .235 6,0 dia.
2033 .300 7,6 dia.
2037 .210 5,3 to .300 7,6 dia.
2035-2 2 holes ea. @ .335 8,5 dia.
2036 .380 9,7 dia.
2041 .400 10,2 dia.
2042 .250 6,3 to .400 10,2 dia.
2032 .250 6,3 to .500 12,7 dia.
2038 .440 11,3 dia.
2039 .250 6,3 to .435 11,0 dia.
2040 .500 12,7 dia.
2035 .730 18,5 dia.
2043 .730 18,5 dia.
2044 .500 12,7 to .710 18,0 dia.
2035-15 15 conductor, .038 x .75 1,0 x 19,1.
ET, FA 0071 10 conductor, .060 x .500 1,5 x 12,7
FF, FD 0121 20 conductor, .060 x 1.00 1,5 x 25,4
FC, SE 0146 26 conductor, .060 x 1.25 1,5 x 31,8
SA, RC 0221 40 conductor, .060 x 2.00 1,5 x 50,8
RA 0765 10 conductor, .038 x .500 1,0 x 12,7
1240 20 conductor, .040 x 1.00 1,0 x 25,4
1265 20 conductor, .038 x 1.00 1,0 x 25,4
1729 26 conductor, .060 x 1.25 1,5 x 31,8
1785 26 conductor .060 x 1.25 1,5 x 31,8
2265 40 conductor, .038 x 2.00 1,0 x 50,8
2375 34 conductor, .060 x 1.70 1,5 x 43,2
2440 40 conductor, .280 x 2.00 7,1 x 50,8
2480 40 conductor, .060 x 2.00 1,5 x 50,8
2500 40 conductor, .060 x 2.00 1,5 x 50,8
2940 50 conductor, .280 x 2.50 7,1 x 63,5
3000 50 conductor, .060 x 2.50 1,5 x 63,5
3012 50 conductor, .060 x 2.50 1,5 x 63,5
3500 60 conductor, .060 x 3.00 1,5 x 76,2
4340 64 conductor, .100 x 3.20 2,5 x 8,2
FX 0984-0 .030 x .700 0,76 x 17,8
0984-2 .030 x .700 0,76 x 17,8
1261-2 .030 x .980 0,76 x 24,9
1450-1 .030 x 1.155 0,76 x 29,3
0984-0 .018 x 1.29 95,0 x 32,8
Maximum recommended
Series Size cable size- in. mm
Maximum recommended
Series Size cable size-in.mm
TC, ET 0550 .214 5,4 dia.
BA, BC 0617 .276 7,0 dia.
IL 0642 .320 8,1 dia.
0805 .404 10,3 dia.
0937 .449 11,4 dia.
1123 .543 13,8 dia.
0984 .591 15,0 dia.
1251 .750 19,1 dia.
1501 .750 19,1 dia.
1500 1.000 25,4 dia.
2000 1.000 25,4 dia.
Special 0138-7 .034 0,8 dia.
Purpose 0137-3 .051 1,3 dia.
Solid 0200-4 .062 1,6 dia.
Beads, 0300-0 .069 1,8 dia.
PM 0250-1 .125 3,2 dia.
0350-1 .170 4,3 dia.
0355-0 .187 4,8 dia.
0385-2 .038 0,9 dia.
0375-3 .200 5,0 dia.
0500-3 .312 7,9 dia.
0562-2 .250 6,3 dia.
0563-0 .285 7,3 dia.
0625-0 and 0625-1 .310 7,9 dia.
0626-0 .133 3,4 dia.
0672-0 .345 8,8 dia.
0686-2 .375 9,5 dia.
0735-0 .400 10,2 dia.
0736-0 .410 10,4 dia.
1020-1 .505 12,8 dia.
1102-1 .630 16,0 dia.
1250-2 .750 19,0 dia.
1387-1 .880 22,4 dia.
2000-3 1.000 25,4 dia.
JB 0010 .060 1,5 to .120 3,1 dia.
PM 3375 .192 4,8 dia.
0625 .310 7,9 dia.
1625 .310 7,9 dia.
0686 .375 9,5 dia.
SS, AS 2027 .085 2,2 dia.
HI, HF 2034 .125 3,2 to .170 4,3 dia.
HW, HA, 2031 .200 5,1 dia.
Maximum recommended
Series Size cable size- in. mm
SM 0760 10 conductor, .051 x .510 1,3 x 13,0
0785 10 conductor, .145 x .500 3,7 x 12,7
and 1101 18 conductor, .059 x .900 1,5 x 22,8
1127/-2 18 conductor, .060 x .900 1,5 x 22,8
Rectangular 1260 20 conductor, .051 x 1.01 1,3 x 25,7
Solids 1531 20 conductor, .210 x 1.00 12,9 x 25,4
1575 26 conductor, .051 x 1.30 1,3 x 33,0
1775 26 conductor, .060 x 1.30 1,5 x 33,0
1953 34 conductor, .059 x 1.70 1,5 x 43,1
2170 35 conductor, .050 x 1.72 1,2 x 43,7
2002 40 conductor, .300 x 2.00 7,6 x 50,8
1779 40 conductor, .066 x 2.00 1,6 x 50,8
2300 40 conductor, .051 x 2.05 1,3 x 52,1
3149 50 conductor, .075 x 2.70 1,9 x 68,5
CS, CA 1642 and 0642 .300 7,6 dia.
CW, CF 1805 and 0805 .345 8,7 dia.
1937 and 0937 .400 10,2 dia.
1984 and 0984 .520 13,2 dia.
1501 .750 19,1 dia.
1500 1.000 25,4 dia.
2000 1.000 25,4 dia
4000 2.000 50,8 dia..
CV 1642 .120 3,0 to .300 7,6 dia.
1805 .120 3,0 to .345 8,7 dia.
1937 .200 5,1 to .400 10,2 dia.
1984 .200 5,1 to .500 12,7 dia.
Toroids 0870-0 .540 13,7 dia.
0999-0 .610 15,5 dia.
1225-0 .750 19,1 dia.
1417-0 .905 23,0 dia.
2400-0 1.400 35,6 dia.
Extra 2275 1.335 33,9 dia.
Large 3170 1.645 41,8 dia.
Toroids 2945 1.775 45,1 dia.
4100 2.650 67,3 dia.
5950 3.675 93,3 dia.
5945 4.330 110,0 dia.
9210 6.665 169,3 dia.
SB all per application - see page 14
Temperature Factor
Formula Description Application Permeability Bs @ 10 Oe Loss Factor Curie Temp. Vol. Res. (20ºC to 100ºC)
µi Gauss (1µiQ) x 10-6 ºC ohm-cm (x 106) per ºC
28 Material
Most popular wideband
1MHz-1GHz, 250MHz peak
850 3350 120 @ 1.0MHz ≥ 175 x 105 < 7
33 Material Low frequency
1MHz-60MHz, 30MHz peak
2700 4800 7 @ .1MHz ≥ 200 x 102 < 7
25 Material High frequency
1MHz-1.2GHz, 700MHz peak
125 3650 32 @ 2.5MHz ≥ 225 x 108 < 7
20 Material Microwave
2.45GHz peak
20 2700 500 @ 100.0MHz ≥ 510 x 108 < 7
33
For attenuation properties by frequency, see page 32
Parameters CTM030 CTM032
Fields Electric Magnetic
Frequency Response 2MHz - 2GHz 1MHz - 1GHz
RF Output Yes Yes
DC Output to a multimeter Yes Yes
Sensitivity (typical) -10dBm/(V/m) -20dBm/mA
Connector SMB/BNC SMB/BNC
Dimensions (approx.) 6.18” x 1.21” x 0.76” (157 x 31 x 20mm) 6.18” x 1.21” x 0.76” (157 x 31 x 20mm)
Weight (approx.) 2.25oz (65g) 2.25oz (65g)
Battery (included) 2 x AAA 2 x AAA
LED Bar Graph 5 LED color bar 5 LED color bar
Audio Indication Speaker (tone pitch proportional to the eld strength)
CTK015 W/ BOTH PROBES PROBE PROBE
rfi-emi testing aids
ScanEM probes
NEAR-FIELD DETECTORS FOR EASY MEASUREMENT OF ELECTROMAGNETIC EMISSIONS
Shorten your development schedule and eliminate the need for product redesign by using proper
EMC tools from the beginning of the project. ScanEM probes are diagnostic instruments for detecting,
locating and measuring electromagnetic emissions. They are professional tools that don’t require
you to be an EMC expert to completely address emission compliance. They can reliably predict
electromagnetic behavior of your products and locate emission sources in a matter of seconds. They
detect the presence of an electromagnetic eld and provide audio and visual indication of its relative
strength either working by themselves, or as broadband active probes with any spectrum analyzer,
oscilloscope or multimeter.
• Pinpoint exact sources of EMI
• Detect electric and magnetic elds separately
• Self-contained: palm-sized, no cords, no power supply or amplier
• Audio output: tone changes indicate eld strength
• LED color bar veries relative eld strength
• Squelch feature nullies ambient to locate problem areas
• Output to spectrum analyzer or oscilloscope if desired
• DC output to multimeter for DC voltage as a function of eld strength
• No disturbance of circuit under test - does not touch the circuit
WHY NEAR-FIELD TESTING?
The standard radiated EMC test is done in the far eld at 10’-0” (3M) from the product. This shows
if there is a failure, but does not pinpoint the source of the problem. A near-eld probe is a close-up
inspection which permits quick product scanning for problem areas.
• PC board traces • Trouble shooting • Production quality control •Service and repair
• Prequalication • Cables, connectors – to a single circuit or pin
• Production quality control • Service and repair
• Non-contact diagnostics – no circuit loading
A day spent at the beginning of a project preventing EMC problems saves days, even weeks, xing these problems at the end.
CTK015
– ScanEM-C PROBE SET
Complete kit contains electric and magnetic near-eld probes. See specications in chart below. Includes
batteries, user guide, storage case and 6’-0” (1,8M) cable with adapters for connecting to spectrum
analyzer, oscilloscope or multimeter. Free ferrite engineering kit included. See information at lower right.
CTK031
– EMC COMPLIANCE ENGINEERING KIT WITH DEMO FIXTURE
Contains both CTM030 electric and CTM032 magnetic near-eld probes shown above along with a step-
by-step guide, an EMC Demo Fixture, and cables with adapters for spectrum analyzer, oscilloscope or
multimeter. Free ferrite engineering kit included. See information at lower right.
Observe how a ferrite
reduces emission
Verify the effectiveness
of shielding
DEMO FIXTURE
FREE #EK28B0032 FERRITE ENGINEERING KIT
WITH EITHER ScanEM PROBE KIT PURCHASE
Our popular, wideband assortment of 32 unique
congurations for EMI cable suppression.
34
For attenuation properties by frequency, see page 32
installation
1. Cable Size
Refer to the chart on the page 33 for maximum recommended cable (or cable bundle)
diameter. More than one cable may be inserted through the core opening since each
circuit reacts with the ferrite material independently.
Consider the double loop knot shown in Attachment section below for snug attachment
while greatly increasing the attenuation effect due to the increased magnetic path
length. See also page 6, gures 3 and 4 for related technical information.
2. Closure
A tight t between the cable outside dimensions; i.e. O.D., and the ferrite
inside dimensions, i.e. I.D., will create the most effective magnetic path and a
correspondingly higher attenuation ratio. Conversely, a loose t is acceptable for
many reasons, principally if a larger ferrite is desired, or a purpose-t slack cable
for tension control, exing, etc.
3. Position
The suppressor should normally be located close to the cable termination where it
exits the electronic enclosure.
Where a cable connects two enclosures containing RF sources, a suppressor on
each end may be required.
For circuits within an enclosure, a position close to the RF source is best; however,
other locations along the circuit may work just as well. This provides the opportunity
to allow the suppressor, when afxed to the enclosure, to function also as a cable
routing guide. See “Attachment” below for alternatives.
4. Attachment
Consider the various attachment alternatives shown below.
RF SOURCE
RF SOURCE
RF SOURCE
RF SOURCE
RF SOURCE
OR
AUXILIARY
EQUIPMENT
OR POWER
SOURCE
OR
ELECTRONIC ENCLOSURE
Installation Guidelines
FerriShield® suppressors offer the nest performance alternatives by way of
universal packaging, specic-purpose and general-purpose formulations. There are
a few simple guidelines to assure expected results.
Tight grip on cable Double loop knot Hardware: screw, rivet Press-fit tabs
Pressure sensitive adhesive Cable tie wrap Side-by-side double
loop for flat cables
35
part number by page index
Each part number is a standard stock item and is carried in our inventories at all times for immediate delivery.
20B0562-2 26
20B0736-0 26
20R1260 27
20R1575 27
21T3350 15
21T3937 15
21T4335 15
28B0137-3 15
28B0138-7 15
28B0200-4 15
28B0250-1 15
28B0300-0 15
28B0350-0 15
28B0355-0 15
28B0375-3 15
28B0385-2 15
28B0562-2 15
28B0563-0 15
28B0625-0 15
28B0625-1 15
28B0626-0 15
28B0672-0 15
28B0686-2 15
28B0735-0 15
28B0736-0 15
28B0785 19,21
28B0870-0 15
28B0999-0 15
28B1020-1 15
28B1101 19
28B1102-1 15
28B1225-0 15
28B1250-2 15
28B1387-1 15
28B1417-2 15
28B1775 19
28B1775-1 19
28B1779 19
28B2000-3 15
28B2002 19,21
28B2170-1 19
28B2275 15
28B2400-0 15
28B2945 15
28B3149 19
28B3170 15
28B4100 15
28B5945 15
28B5950 15
28B9210 15
28R0760 19
28R1127 19
28R1127-2 19
28R1260 19
28R1531 19,21
28R1575 19
28R1953 19
28R2300 19
AS20B2030 26,29
AS20B2033 26,29
AS20B2034 26,29
AS20B2037 26,29
AS20B2041 26,29
AS20B2042 26,29
AS25B2030 24,29
AS25B2032 24,29
AS25B2033 24,29
AS25B2036 24
AS25B2037 24,29
AS25B2040 24
AS28B2027 12
AS28B2030 12,29
AS28B2031 12
AS28B2032 12,29
AS28B2033 12,29
AS28B2034 12,29
AS28B2035 12,14
AS28B2035-15 18
AS28B2035-2 14
AS28B2035-3 14
AS28B2036 12
AS28B2037 12,29
AS28B2040 12
AS28B2041 12,29
AS28B2042 12,29
AS28B2043 12
AS28B2044 12
AS33B2030 22
AS33B2032 22
AS33B2033 22
AS33B2035 22
AS33B2036 22
AS33B2037 22
AS33B2040 22
BA28B1251 14
BA28B1500 14
BA28B1501 14
BC28B1251 14
BC28B1500 14
BC28B1501 14
CA20B1500 29
CA20B2000 29
CA20B4000 29
CA25B1500 29
CA25B1642 29
CA25B1937 29
CA25B2000 29
CA25B4000 29
CA28B0642 11
CA28B0805 11
CA28B0937 11
CA28B0984 11
CA28B1500 10,29
CA28B1501 10,29
CA28B1642 10,29
CA28B1805 10,29
CA28B1937 10,29
CA28B1984 10,29
CA28B2000 10,29
CA28B4000 29
CF28B0642 11
CF28B0805 11
Part Number Page # Part Number Page #
CF28B0937 11
CF28B0984 11
CF28B1500 10
CF28B1501 10
CF28B1642 10
CF28B1805 10
CF28B1937 10
CF28B1984 10
CF28B2000 10
CS20B1500 26,29
CS20B2000 26,29,31
CS20B4000 26,29,31
CS25B1500 24,29
CS25B1642 24,29
CS25B1937 24,29
CS25B2000 24,29,31
CS25B4000 24,29,31
CS28B0642 11
CS28B0805 11
CS28B0937 11
CS28B0984 11
CS28B1500 10,29
CS28B1501 10,29
CS28B1642 10,29
CS28B1805 10,29
CS28B1937 10,29
CS28B1984 10,29
CS28B2000 10,29,31
CS28B4000 10,29,31
CS33B1805 22
CS33B1984 22
CS33B2000 22,31
CS33B4000 22,31
CTK015 34
CTK031 28,34
CV28B1642 10
CV28B1805 10
CV28B1937 10
CV28B1984 10
CW28B0642 11
CW28B0805 11
CW28B0937 11
CW28B0984 11
CW28B1500 10
CW28B1501 10
CW28B1642 10
CW28B1805 10
CW28B1937 10
CW28B1984 10
CW28B2000 10
EK20B0009 30
EK25B0012 30
EK28B0021 30
EK28B0032 30
EK28B27SB 30
EK33B0011 30
ET20B2000 31
ET25B2000 31
ET28B2000 31
ET28B3000 31
ET33B2000 31
Part Number Page #
FA20B1729 27
FA20B2480 27
FA25B0121 25
FA25B2480 25
FA28B0071 17
FA28B0121 17
FA28B1240 17
FA28B1265 17
FA28B1729 17
FA28B1785 18
FA28B2265 17
FA28B2375 17
FA28B2480 17
FA28B2500 18
FA28B2940 21
FA28B3000 18
FA28B3012 17
FA33B2480 23
FC20B1729 27
FC20B2480 27
FC25B0121 25
FC25B2480 25
FC28B0071 17
FC28B0121 17
FC28B1240 17
FC28B1729 17
FC28B1785 18
FC28B2375 17
FC28B2480 17
FC28B2500 18
FC28B3000 18
FC28B3012 17
FC33B2480 23
FD25B2480 25
FD28B2375 17
FD28B2480 17
FD28B2500 18
FD28B3000 18
FD28B3012 17
FD33B2480 23
FF25B0121 25
FF25B2480 25
FF28B0121 17
FF28B1240 17
FF28B1265 17
FF28B1729 17
FF28B1785 18
FF28B2375 17
FF28B2440 21
FF28B2480 17
FF28B2500 18
FF28B2940 21
FF28B3000 18
FF28B3012 17
FF33B2480 23
FX28R0984-0/A 19
FX28R0984-2/A 19
FX28R1261-2/A 19
FX28R1450-1/A 19
FX28R1457-4/A 19
Part Number Page #
36
part number by page index
HA28B2038 13
HA28B2039 13
HF28B2038 13
HF28B2039 13
HI28B2038 13
HI28B2039 13
HW28B2038 13
HW28B2039 13
IL25B0642W/G/B/K 24
IL28B0642W/G/B/K 12
JB28B0010 12
PM28B0625 14
PM28B0686 14
PM28B0736 14
PM28B1625 14
PM28B3375 14
RA20B1729 27,29
RA20B2480 27,29
RA25B2480 25,29
RA25B4340 25,29
RA28B0765 16
RA28B1265 16
RA28B1729 16,29
RA28B2265 16
RA28B2480 16,29
RA28B3012 16,29
RA28B4340 16,29
RA33B2480 23
RA33B4340 23
RC20B1729 27,29
RC20B2480 27,29
RC25B2480 25,29
RC25B4340 25,29
RC28B0765 16
RC28B1265 16
RC28B1729 16,29
RC28B2265 16
RC28B2480 16,29
RC28B3012 16,29
RC28B4340 16,29
RC33B2480 23
RC33B4340 23
SA20B1729 27
SA20B2480 27
SA25B0121 25
SA25B2480 25
SA25B4340 25
SA28B0071 17
SA28B0121 17
SA28B0146 17
SA28B0221 17
SA28B1240 17
SA28B1729 17
SA28B2480 17
SA28B3012 17
SA28B3500 17
SA28B4340 17
SA33B2480 23
SA33B4340 23
SB28B0010 20
SB28B0010AB/AT 20
SB28B0071 20
SB28B0071AB/AT 20
SB28B0121 20
SB28B0121AB/AT 20
SB28B0146 20
SB28B0146AB/AT 20
SB28B0221 20
SB28B0221AT/AB 20
SB28B0500 20
SB28B0500-1 20
SB28B0500-1AB 20
SB28B0500AB 20
SB28B0550 20
SB28B0550AB 20
SB28B0617 20
SB28B0617AB 20
SB28B0642 20
SB28B0642AB 20
SB28B0805 20
SB28B0805AB 20
SB28B0875 20
SB28B0875-1 20
SB28B0875-1AB 20
SB28B0875AB 20
SB28B0937 20
SB28B0937AB 20
SB28B0984 20
SB28B0984AB 20
SB28B1055 20
SB28B1055-1 20
SB28B1055-1AB 20
SB28B1055AB 20
SB28B1123 20
SB28B1123AB 20
SB28B1251 20
SB28B1251AB 20
SB28B1500 20
SB28B1500AB 20
SB28B1501 20
SB28B1501AB 20
SB28B1729 20
SB28B1729AT/AB 20
SB28B2000 20
SB28B2000AB 20
SB28B2027 20
SB28B2027AT/AB 20
SB28B2030 20
SB28B2030AT/AB 20
SB28B2031 20
SB28B2031AT/AB 20
SB28B2032 20
SB28B2032AT/AB 20
SB28B2034 20
SB28B2034AT/AB 20
SB28B2035 20
SB28B2035AT/AB 20
SB28B2039 20
SB28B2039AT/AB 20
SB28B2041 20
SB28B2041AT/AB 20
SB28B2043 20
SB28B2043AT/AB 20
SB28B2100 20
SB28B2100-1 20
SB28B2100-1AB 20
SB28B2100AB 20
SB28B2375 20
SB28B2375AT/AB 20
SB28B2480 20
SB28B2480AT/AB 20
SB28B3012 20
SB28B3012AT/AB 20
SB28B3500 20
SB28B3500AT/AB 20
SB28B4340 20
SB28B4340AT/AB 20
SB28B5630 14,21
SB28B5630A 14,21
SE20B1729 27
SE20B2480 27
SE25B0121 25
SE25B2480 25
SE25B4340 25
SE28B0071 17
SE28B0121 17
SE28B0146 17
SE28B0221 17
SE28B1240 17
SE28B1729 17
SE28B2480 17
SE28B3012 17
SE28B3500 17
SE28B4340 17
SE33B2480 23
SE33B4340 23
SM20R1260 27
SM20R1575 27
SM28B0785 19,21
SM28B1101 19
SM28B1775 19
SM28B1775-1 19
SM28B1779 19
SM28B2002 19,21
SM28B2170-1 19
SM28B3149 19
SM28R0760 19
SM28R1127 19
SM28R1127-2 19
SM28R1260 19
SM28R1531 19,21
SM28R1575 19
SM28R1953 19
SM28R2300 19
SS20B2030 26,29
SS20B2033 26,29
SS20B2034 26,29
SS20B2037 26,29
SS20B2041 26,29
SS20B2042 26,29
SS25B2030 24,29
SS25B2032 24,29
SS25B2033 24,29
SS25B2036 24
SS25B2037 24,29
SS25B2040 24
SS28B2027 12
SS28B2030 12,29
SS28B2031 12,14
SS28B2032 12,29
SS28B2033 12,29
SS28B2034 12,14,29
SS28B2035 12,14
SS28B2035-15 18
SS28B2035-2 14
SS28B2035-3 14
SS28B2036 12
SS28B2037 12,29
SS28B2040 12
SS28B2041 12,29
SS28B2042 12,29
SS28B2043 12
SS28B2044 12
SS33B2030 22
SS33B2032 22
SS33B2033 22
SS33B2035 22
SS33B2036 22
SS33B2037 22
SS33B2040 22
TC20B1500 26
TC20B2000 26
TC25B0642 24
TC25B0937 24
TC25B1500 24
TC25B2000 24
TC28B0550 11
TC28B0617 11
TC28B0642 11
TC28B0805 11
TC28B0937 11
TC28B0984 11
TC28B1123 11
TC28B1251 11
TC28B1500 11
TC28B1501 11
TC28B2000 11
TC33B0805 22
TC33B0984 22
TC33B2000 22
USB28B2034 13
USB28B2034A 13
USB28B2034K 13
USB28B2034KA 13
Part Number Page # Part Number Page # Part Number Page # Part Number Page #
Each part number is a standard stock item and is carried in our inventories at all times for immediate delivery.
37
Board Level Shielding
• Standard and Multi-Cavity CBS
• Modied Standard Options
• Custom Circuit Board Shields
FerriShield Ferrites
• Snap-On Bisected & Solid Bead Ferrites
• Round & Flat Styles for Cables, Wires and Flex Circuits
• Low, High, Microwave and Wideband Frequency-Specic
Material
Enclosure Shielding
• BeCu Fingerstock Gaskets
• TechSIL 5000 Conductive Elastomers
• Conductive Fabric Shielding Gaskets
• TechSIL 8000 Oriented Wire Gaskets
• TechMESH Knitted Wire Gaskets
• TechMESH Combo Strip & Gaskets
• TechVent Honeycomb Shielding Panels
EMI Enclosure
Solutions Catalog CBS Circuit Board
Shielding Catalog
EMI PROBLEM?
Our sales engineers are waiting for your call: 866-TECH-EMI (866-832-4364)
Visit our web site today to browse our complete product line, download literature and
nd your local sales engineer or sales representative! www.leadertechinc.com
we’ve got you covered
Leader Tech is a world-leading innovator and
US-based manufacturer of EMI shielding products
for circuit boards, enclosures and cables. In addition
to our best selling standard, modied standard
and custom CBS shields, Leader Tech offers an
expansive line of beryllium copper ngerstock
gaskets, conductive elastomers, advanced RF
absorber materials and EMI/RFI ferrites.
WE’VE GOT YOU COVERED
Reliable Board, Enclosure and Cable Shielding Solutions
LEADERTECH SHIELDING PRODUCTS
38
ordering information
12420 Race Track Road, Tampa, Florida 33626
www.leadertechinc.com • sales@leadertechinc.com
866.TECH.EMI (866.832.4364)
•
Local: 813.855.6921
Fax: 813.855.3291
STANDARD PRODUCTS
Part Number Explanation
Part Material Ferrite Ferrite Special
Style Type Shape Size Option
SS 28 B 2031 K
Color
All plastic components are supplied in PMS #413 computer gray unless shown in photos as natural
white or black. Black is optional where indicated.
Custom Products
Engineering support is always available for special designs and evaluations.
Samples
Most items on catalog pages 10 through 27 are available from stock on a complimentary basis.
Commercial and Government Entity Code (CAGE CODE): 4J674
Quality System
ISO 9001:2008 certied.
Delivery
All items are normally available from stock at all times for immediate delivery.
RoHS Directive
All FerriShield products are in compliance with the European Commission RoHS Directive, Restriction of use of
certain Hazardous Substances, dated July, 1 2006. FerriShield products do not contain any of the six restricted
substances; namely, lead, cadmium, mercury, hexavalent chromium, PBB or PBDE ame retardant.
Customer Service
For quotes, technical information or personal assistance, contact:
STATEMENT OF LIEU OF WARRANTY: All technical information and data in this document is based on tests and is believed to be accurate and reliable. Nevertheless, since the products described
herein are not provided to conform with mutually accepted specications and the use thereof is unknown, the manufacturer and seller of the products do not guarantee results, freedom from patent
infringement, or suitability of the products for any application thereof. The manufacturer and seller of the products described in this document will provide all possible technical assistance and
will replace any products proven defective. No statement or recommendations made by the manufacturer or seller not contained herein shall have any force of effect unless in conformity with an
agreement signed by an ofcer of the seller and manufacturer. Product testing by the purchaser is recommended in order to conrm expected results.
copyright© Leader Tech, Inc. 2009
39
ISO 9001: 2008
CERTIFIED
✔
RoHS
COMPLIANT
40
F071
12420 Race Track Rd.
Tampa, Florida 33626
866.TECH.EMI (866.832.4364)
Tel:
813.855.6921
Fax:
813.855.3291
www.leadertechinc.com
A passion in all we do
ISO 9001: 2008
CERTIFIED
✔
RoHS
COMPLIANT
WWW.LEADERTECHINC.COM
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
LeaderTech:
FA25B0121 FF25B0121 FC25B0121 SA25B0121 SE25B0121 RC25B4340 RA25B4340 SE25B4340
SA25B4340 FC25B2480 FA25B2480 FF25B2480 FD25B2480 RA25B2480 RC25B2480 SA25B2480 SE25B2480