Features
■ Superior circuit protection
■ Overcurrent and overvoltage protection
■ Blocks surges up to rated limits
■ High-speed performance
■ Small SMT package
■ Agency listing:
Applications
■ Voice / VDSL cards
■ Protection modules and dongles
■ Process control equipment
■ Test and measurement equipment
■ General electronics
TBU-CA Series - TBU® High-Speed Protectors
General Information
The TBU-CA Series of Bourns® TBU®
products are low capacitance single
bidirectional high-speed protection
components, constructed using MOSFET
semiconductor technology, and designed
to protect against faults caused by short
circuits, AC power cross, induction and lightning surges.
The TBU® high-speed protector placed in the system circuit will monitor the current with
the MOSFET detection circuit triggering to provide an effective barrier behind which
sensitive electronics will not be exposed to large voltages or currents during surge
events. The TBU® device is provided in a surface mount DFN package and meets
industry standard requirements such as RoHS and Pb Free solder
Agency Listing
Description
UL File Number: E315805
Absolute Maximum Ratings (@ TA = 25 °C Unless Otherwise Noted)
Symbol Parameter Part Number Value Unit
Vimp Peak impulse voltage withstand with duration less than 10 ms
TBU-CA025-xxx-WH
TBU-CA040-xxx-WH
TBU-CA050-xxx-WH
TBU-CA065-xxx-WH
TBU-CA085-xxx-WH
250
400
500
650
850
V
Vrms Continuous A.C. RMS voltage
TBU-CA025-xxx-WH
TBU-CA040-xxx-WH
TBU-CA050-xxx-WH
TBU-CA065-xxx-WH
TBU-CA085-xxx-WH
100
200
250
300
425
V
Top Operating temperature range -55 to +125 °C
Tstg Storage temperature range -65 to +150 °C
Tjmax Maximum Junction Temperature +125 °C
ESD HBM ESD protection per IEC 61000-4-2 ±2 kV
TBU
®
Device
Line In/
Line Out
Line Out/
Line In
*RoHS COMPLIANT
Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
EMEA: Tel: +36 88 520 390 • Fax: +36 88 520 211
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on
the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf
TBU-CA Series - TBU® High-Speed Protectors
Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted)
Symbol Parameter Part Number Min. Typ. Max. Unit
Itrigger
Current required for the device to go from operating state to
protected state
TBU-CAxxx-050-WH
TBU-CAxxx-100-WH
TBU-CAxxx-200-WH
TBU-CAxxx-300-WH
TBU-CAxxx-500-WH
50
100
200
300
500
75
150
300
450
750
100
200
400
600
1000
mA
Rdevice
Series resistance of
the TBU device
Vimp = 250 V Itrigger (min.) = 50 mA
Vimp = 250 V Itrigger (min.) = 100 mA
Vimp = 250 V Itrigger (min.) = 200 mA
Vimp = 250 V Itrigger (min.) = 300 mA
Vimp = 250 V Itrigger (min.) = 500 mA
Vimp = 400 V Itrigger (min.) = 50 mA
Vimp = 400 V Itrigger (min.) = 100 mA
Vimp = 400 V Itrigger (min.) = 200 mA
Vimp = 400 V Itrigger (min.) = 300 mA
Vimp = 400 V Itrigger (min.) = 500 mA
Vimp = 500 V Itrigger (min.) = 50 mA
Vimp = 500 V Itrigger (min.) = 100 mA
Vimp = 500 V Itrigger (min.) = 200 mA
Vimp = 500 V Itrigger (min.) = 300 mA
Vimp = 500 V Itrigger (min.) = 500 mA
Vimp = 650 V Itrigger (min.) = 50 mA
Vimp = 650 V Itrigger (min.) = 100 mA
Vimp = 650 V Itrigger (min.) = 200 mA
Vimp = 650 V Itrigger (min.) = 300 mA
Vimp = 650 V Itrigger (min.) = 500 mA
Vimp = 850 V Itrigger (min.) = 50 mA
Vimp = 850 V Itrigger (min.) = 100 mA
Vimp = 850 V Itrigger (min.) = 200 mA
Vimp = 850 V Itrigger (min.) = 300 mA
Vimp = 850 V Itrigger (min.) = 500 mA
TBU-CA025-050-WH
TBU-CA025-100-WH
TBU-CA025-200-WH
TBU-CA025-300-WH
TBU-CA025-500-WH
TBU-CA040-050-WH
TBU-CA040-100-WH
TBU-CA040-200-WH
TBU-CA040-300-WH
TBU-CA040-500-WH
TBU-CA050-050-WH
TBU-CA050-100-WH
TBU-CA050-200-WH
TBU-CA050-300-WH
TBU-CA050-500-WH
TBU-CA065-050-WH
TBU-CA065-100-WH
TBU-CA065-200-WH
TBU-CA065-300-WH
TBU-CA065-500-WH
TBU-CA085-050-WH
TBU-CA085-100-WH
TBU-CA085-200-WH
TBU-CA085-300-WH
TBU-CA085-500-WH
13.3
7.1
4.2
3.2
2.6
14.3
8.1
5.2
4.3
3.6
15.7
9.5
6.6
5.6
5.0
17.7
11.5
8.6
7.6
7.0
21.4
15.2
12.3
11.3
10.7
15.3
8.2
4.8
3.8
3.0
16.5
9.4
6.0
5.0
4.2
18.0
10.9
7.5
6.5
5.7
20.3
13.2
9.8
8.8
8.0
24.5
17.4
14.0
13.0
12.2
Ω
tblock Time for the device to go from normal operating state to protected state 1 μs
IQCurrent through the triggered TBU® device with 50 Vdc circuit voltage 0.25 0.50 1.00 mA
Vreset Voltage below which the triggered TBU® device will transition to normal operating state 12 16 20 V
Rth(j-l) Junction to package pads - FR4 using recommended pad layout 98 °C/W
Rth(j-l) Junction to package pads - FR4 using heat sink on board (6 cm2) (1 in2) 40 °C/W
Environmental Characteristics
Parameter Value
Moisture Sensitivity Level 1
1B
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
2.2
1.6
1.8
2.0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-75 -50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
Normalized Resistance
TBU-CA Series - TBU® High-Speed Protectors
Reference Application
The TBU® devices are general use protectors used in a wide
variety of applications. The maximum voltage rating of the TBU®
device should never be exceeded. Where necessary, an OVP
should be employed to limit the maximum voltage. A cost-
effective protection solution combines Bourns® TBU® protection
devices with a pair of Bourns® MOVs. For bandwidth sensitive
applications, a Bourns® GDT may be substituted for the MOV.
The TBU® device, constructed using MOSFET semiconductor
technology, placed in the system circuit will monitor the current
with the MOSFET detection circuit triggering to provide an
effective barrier behind which sensitive electronics are not
exposed to large voltages or currents during surge events. The
TBU®
exceeds the TBU®trigger. When operat-
ed, the TBU® device will limit the current to less than the Itrigger
value within the tblock duration. If voltage above Vreset is contin-
uously sustained, the TBU® device will subsequently reduce the
current to a quiescent current level within a period of time that is
dependent upon the applied voltage.
After the surge, the TBU® device resets when the voltage
across the TBU® device falls to the Vreset level. The TBU®
device will automatically reset on lines which have no DC bias
or have DC bias below Vreset (such as unpowered signal lines).
If the line has a normal DC bias above Vreset, the voltage
across the TBU® device may not fall below Vreset after the
surge. In such cases, special care needs to be taken to ensure
that the TBU® device will reset, with software monitoring as one
method used to accomplish this. Bourns application
engineers can provide further assistance.
Basic TBU Operation
Performance Graphs
Typical V-I Characteristics (TBU-CA050-300-WH) Typical Trigger Current vs. Temperature
Equip.
OVP
OVP
Line
Line
TBU
®
Device
TBU
®
Device
Line In /
Line Out
Line Out
/ Line In
Line Out
/ Line In
Line In /
Line Out
Typical Resistance vs. Temperature
Power Derating Curve
CURRENT
(100 mA/div)
VOLTAGE
(5 V/div)
ITRIP
VRESET
No Additional PCB Cu
0.5 sq. in. Additional PCB Cu
Junction Temperature (°C)
20
3.0
2.5
2.0
1.5
1.0
0.5
0.0
40 60 80 100 120 140
Total Max. Power (W)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-75 -50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
Normalized Trip Current
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
TBU-CA Series - TBU® High-Speed Protectors
Product Dimensions
DIMENSIONS: MM
(INCHES)
Recommended Pad Layout
TBU® High-Speed Protectors have a 100 % matte-tin termination
uses PCB copper areas which extend beyond the exposed solder
which matches the pad layout of the TBU® device in size and spac-
ing. It is recommended that they should be the same dimension as
the TBU® pads but if smaller solder pads are used, they should be
centered on the TBU® package terminal pads and not more than
0.10-0.12 mm (0.004-0.005 in.) smaller in overall width or length.
Solder pad areas should not be larger than the TBU® pad sizes
to ensure adequate clearance is maintained. The recommended
stencil thickness is 0.10-0.12 mm (0.004-0.005 in.) with a stencil
opening size 0.025 mm (0.0010 in.) less than the solder pad size.
the junction to ambient thermal resistance, resulting in operation
-
ability. All pads should soldered to the PCB, including pads marked
as NC or NU but no electrical connection should be made to these
pads. For minimum parasitic capacitance, it is recommended that
signal, ground or power signals are not routed beneath any pad.
PIN 1 & BACKSIDE CHAMFER
4.00 ± 0.10
(.157 ± .004)
0.00 - 0.05
(.000 - .002)
6.50 ± 0.10
(.256 ± .004)
0.30
(.012)
3.40
(.134)
0.30
(.012)
1.85
(.073)
0.70
(.028)
0.70
(.028) 0.80
(.031)
1.85
(.073)
C PIN 1
0.25
(.010)
A =
A1 =
SEATING PLANE
0.80 - 1.00
(.031 - .039)
XXXXX
YWWLL
3 2 1
Pad # Pin Out
1 Line In/Out
2NU
3 Line Out/In
Pad Designation
Dark grey areas show added PCB copper area for better
thermal resistance.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
TBU-CA Series - TBU® High-Speed Protectors
Pb-Free Assembly
Average Ramp-Up Rate (Tsmax to Tp) 3 °C/sec. max.
Preheat
- Temperature Min. (Tsmin)
- Temperature Max. (Tsmax)
- Time (tsmin to tsmax)
150 °C
200 °C
60-180 sec.
Time maintained above:
- Temperature (TL)
- Time (tL)
217 °C
60-150 sec.
260 °C
Time within 5 °C of Actual Peak Temp. (tp) 20-40 sec.
Ramp-Down Rate 6 °C/sec. max.
Time 25 °C to Peak Temperature 8 min. max.
How to Order
TBU - CA 085 - 500 - WH
TBU® Product
Series
CA = Bi-Series
Impulse Voltage Rating
025 = 250 V
040 = 400 V
050 = 500 V
065 = 650 V
085 = 850 V
Trigger Current
050 = 50 mA
100 = 100 mA
200 = 200 mA
300 = 300 mA
500 = 500 mA
W = Hold to Trip Ratio
H = DFN Package
Typical Part Marking
Thermal Resistance vs Additional PCB Cu Area
Added Cu Area (Sq. In.)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
120
100
80
60
40
20
0
Thermal Resistance (°C/W)
PIN 1
MANUFACTURER’S
TRADEMARK
5 DIGIT PRODUCT CODE:
• 1ST ALPHA CHARACTER INDICATES PRODUCT FAMILY:
A = TBU-CA SERIES
• 2ND & 3RD DIGITS INDICATE IMPULSE VOLTAGE.
• 4TH & 5TH DIGITS INDICATE TRIGGER CURRENT.
MANUFACTURING
DATE CODE:
• 1ST DIGIT INDICATES THE YEAR.
• 2ND & 3RD DIGITS INDICATE THE WEEK NUMBER.
• 4TH & 5TH DIGITS INDICATE LOT CODE.
XXXXX
YWWLL
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
TBU-CA Series - TBU® High-Speed Protectors
“TBU” is a registered trademark of Bourns, Inc. in the United States and other countries.
REV. 03/18
DIMENSIONS: MM
(INCHES)
A B C D G N
Min. Max. Min. Max. Min. Max. Min. Max. Ref. Ref.
326
(12.835)
330
(13.002)
1.5
(.059)
2.5
(.098)
12.8
(.504)
13.5
(.531)
20.2
(.795) - 16.5
(.650)
102
(4.016)
A0 B
0 D D1 E F
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. max.
4.3
(.169)
4.5
(.177)
6.7
(.264)
6.9
(.272)
1.5
(.059)
1.6
(.063)
1.5
(.059) -1.65
(.065)
1.85
(.073)
7.4
(.291)
7.6
(.299)
QUANTITY: 3000 PIECES PER REEL
B
A
D
N
G (MEASURED AT HUB)
USER DIRECTION OF FEED
The type of corner on carrier will vary at different assembly sites.
K0
C
XXXXX
YWWLL
t
B0
DP2
P0
P
A0
D1
E
W
F
R
EMBOSSMENT
W
Min. Max.
15.7
(.618)
16.3
(.642)
K0P P0 P
2 R t
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
1.0
(.039)
1.2
(.047)
7.9
(.311)
8.1
(.319)
3.9
(.159)
4.1
(.161)
1.9
(.075)
2.1
(.083)
0
(0)
0.5
(.020)
0.25
(.010)
0.35
(.014)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
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the user’s sole risk.
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