Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
ST
ASCTB210E 201202-T
ORDERING INFORMATION
1a1b/2a 8A polarized power
relays ST RELAYS
VDE
FEATURES
1. Even with small form factor,
sensitive enough for direct IC-
driving
The dimensions of this high-density 4-
gap balanced armature are 31 mm ×
14 mm × 11 mm 1.220 inch × .551 inch
× .433 inch. Despite this small size,
high sensitivity is achieved by a
mechanism that incorporates high-
efficiency polarized magnetic circuits
along with our exclusive spring
alignment method. With an minimum
operating power of about 150 mW,
nominal operating power of 240 mW,
this relay can be directly driven by
transistor or chip controllers.
RoHS compliant
2. High switching capability
High contact pressure, low contact
bounce, and forced separation
structure that radically improves
resistance to contact welding
(1 F orm A 1 Form B type equivalent to
TV-3). Strong against lamp inductive
loads, maximum switching capacity
has reached 3,040 VA (8A 380V AC).
3. High breakdown voltage – Optimal
for control in 250 V power circuits
High breakdown voltage has been
achie ved. Betw een contacts and coil of
3,750 Vrms; Surge breakdown v oltage
between coil and contact of 6,000 V,
and between open contacts of 1,200
Vrms mean that these relays are
suitable even for 250 V power circuit
control.
4. Improved stability
Conforms to all types of safety
standards.
Insulating distance of more than 3 mm
secured. Complies with Japan
Electrical Appliance and Material
Safety Law requirements for operating
200 V power supply circuits, and
conforms with UL, CSA and VDE
standards.
5. Latching types available
In addition to single side stable types,
convenient 2 coil latching types with
memory functions are also available.
Moreover, we offer 2 Form A
specifications which, with double pole
switching for applications such as 250
V power circuit switching, can enable
safer designs.
6. Automatic cleaning possible
The sealed design means that these
relays can undergo immersion in
automatic washing systems and are
suitable for automatic soldering. Even
in difficult environments, the contacts
remain reliable.
7. Easy to design PC board patterns
Features 4/10 dual-in-line terminals.
Because the lead spacing has a pitch
greater than 7.54 mm .297 inch,
designers can make easy adjustments
with the width of the land size. This,
along with the large insulation
distance, simplifies the drawing of PC
board patterns.
8. To improve soldering efficiency,
preapplication of solder to the
terminals is recommended.
9. Sockets are available.
Contact material
F: AgSnO2 type contact
Nominal coil voltage
DC 3, 5, 6, 9, 12, 24, 48 V
Contact arrangement
1: 1 Form A 1 Form B
2: 2 Form A
ST F
Operating function
Nil:
L2: Single side stable
2 coil latching
Note: Certified by UL, CSA, VDE and SEV
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
ST
ASCTB210E 201202-T
TYPES
Standard packing: Carton: 50 pcs.; Case: 500 pcs.
* For sockets, see page 113.
RATING
1. Coil data
1) Single side stable
2) 2 coil latching
Contact arrangement Nominal coil voltage Single side stable 2 coil latching
Part No. Part No.
1 Form A 1 Form B
3V DC ST1-DC3V-F ST1-L2-DC3V-F
5V DC ST1-DC5V-F ST1-L2-DC5V-F
6V DC ST1-DC6V-F ST1-L2-DC6V-F
9V DC ST1-DC9V-F ST1-L2-DC9V-F
12V DC ST1-DC12V-F ST1-L2-DC12V-F
24V DC ST1-DC24V-F ST1-L2-DC24V-F
48V DC ST1-DC48V-F ST1-L2-DC48V-F
2 Form A
3V DC ST2-DC3V-F ST2-L2-DC3V-F
5V DC ST2-DC5V-F ST2-L2-DC5V-F
6V DC ST2-DC6V-F ST2-L2-DC6V-F
9V DC ST2-DC9V-F ST2-L2-DC9V-F
12V DC ST2-DC12V-F ST2-L2-DC12V-F
24V DC ST2-DC24V-F ST2-L2-DC24V-F
48V DC ST2-DC48V-F ST2-L2-DC48V-F
Nominal coil
voltage Pick-up voltage
(at 20°C 68°F)Drop-out voltage
(at 20°C 68°F)
Nominal operating
current
[±10%] (at 20°C 68°F)
Coil resistance
[±10%] (at 20°C 68°F)Nominal operating
power Max. applied voltage
(at 20°C 68°F)
3V DC
80%V or less of
nominal voltage
(Initial)
10%V or more of
nominal voltage
(Initial)
75mA 38Ω
240mW 150%V of
nominal voltage
5V DC 47mA 105Ω
6V DC 40mA 150Ω
9V DC 25mA 360Ω
12V DC 20mA 600Ω
24V DC 10mA 2,400Ω
48V DC 4.7mA 9,000Ω
Nominal coil
voltage Set voltage
(at 20°C 68°F)Reset voltage
(at 20°C 68°F)
Nominal operating
current
[±10%] (at 20°C 68°F)
Coil resistance
[±10%] (at 20°C 68°F)Nominal operating
power Max. applied voltage
(at 20°C 68°F)
Set coil Reset coil Set coil Reset coil Set coil Reset coil
3V DC
80%V or less of
nominal voltage
(Initial)
80%V or less of
nominal voltage
(Initial)
75mA 75mA 40Ω40Ω
240mW 240mW 150%V of
nominal voltage
5V DC 45mA 45mA 110Ω110Ω
6V DC 37.5mA 37.5mA 155Ω155Ω
9V DC 25mA 25mA 360Ω360Ω
12V DC 18.8mA 18.8mA 640Ω640Ω
24V DC 10mA 10mA 2,400Ω2,400Ω
48V DC 4.7mA 4.7mA 10,200Ω10,200Ω
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
ST
ASCTB210E 201202-T
2. Specifications
Notes: *1. This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the
actual load.
*2. Wave is standard shock voltage of ±1.2×50µs according to JEC-212-1981
*3. The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to Usage, transport and storage
conditions in NOTES.
REFERENCE DATA
Characteristics Item Specifications
Contact Arrangement 1 Form A 1 Form B, 2 Form A
Contact material Au-flashed AgSnO2 type
Contact resistance (Initial) Max. 30 mΩ (By voltage drop 6 V DC 1A)
Rating
Max. switching power (resistive load) 3,040 VA, 150 W
Max. switching voltage 380 V AC, 250 V DC
Max. switching current 8 A
Minimum operating power 150mW (Single side stable, 2 coil latching)
Nominal operating power 240mW (Single side stable, 2 coil latching)
Min. switching capacity (Reference value)*1100 mA 5V DC
Electrical
characteristics
Insulation resistance (Initial)
(at 25°C, 50% relative humidity) Min. 1,000MΩ (at 500V DC)
Measurement at same location as “Breakdown voltage” section.
Breakdown voltage
(Initial)
Between open contacts 1,200 Vrms for 1 min. (Detection current: 10 mA)
Between contact sets 2,000 Vrms for 1 min. (Detection current: 10 mA)
Between contact and coil 3,750 Vrms for 1 min. (Detection current: 10 mA)
Surge breakdown voltage (Initial)*26,000 V (Between contact and coil)
Operate time [Set time] (at 20°C 68°F)Max. 15 ms [Max. 15 ms]
(Nominal coil voltage applied to the coil, excluding contact bounce time.)
Release time [Reset time] (at 20°C 68°F)Max. 10 ms [Max. 15 ms]
(Nominal coil voltage applied to the coil, excluding contact bounce time.) (without diode)
Temperature rise (coil) (at 60°C 140°F)Max. 55°C
(By resistive method, nominal voltage applied to the coil; contact carrying current: 8A.)
Mechanical
characteristics
Shock resistance Functional Min. 196 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10µs.)
Destructive Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.)
Vibration resistance Functional 10 to 55 Hz at double amplitude of 2 mm (Detection time: 10µs.)
Destructive 10 to 55 Hz at double amplitude of 3 mm
Expected life Mechanical Min. 107 (at 180 times/min.)
Electrical Min. 105 (8 A 250 V AC resistive) (ON : OFF = 1 s : 5 s)
Conditions Conditions for operation, transport and storage*3Ambient temperature: –40°C to +60°C –40°F to +140°F;
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed 30 cps
Unit weight Approx. 10g .353 oz
1. Max. switching power 2. Coil temperature rise 3. Influence of adjacent mounting
10
5
2
1
0.5
0.2
020 50100
200 300 600 1000
Voltage, V
Current, A
AC inductive
load
(cosϕ=0.4)
DC inductive
load
(L/R=40ms)
AC resistive load
DC resistive
load
100
0.2 0.4 0.6 0.8 1.0 1.2
90
80
70
60
50
40
30
20
10
0
Temperature rise, °C
Coil operating power, W
0A
Contact current 8A
Pick-up voltage
Drop-out voltage
40
30
20
10
0
-10
-20
-30
-40 5101520
Rated of change, %
Inter-relay distance, mm
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
ST
ASCTB210E 201202-T
DIMENSIONS (mm inch)
SAFETY STANDARDS
NOTES
For Cautions for Use.
UL/C-UL (Recognized) CSA (Certified) VDE (Certified) TV rating (UL/CSA) SEV
File No. Contact rating File No. Contact rating File No. Contact rating File No. Rating File No. Contact rating
E43028 8A 250V AC
1/4HP 125, 250V AC
5A 30V DC
LR26550
etc. 8A 250V AC
1/4HP 125, 250V AC
5A 30V DC
1017 8A 250V AC (cos
φ
=1.0)
4A 250V AC (cos
φ
=0.4)
5A 30V DC
UL: E43028
CSA: LR26550 — 98-1 10289 8A 380V AC
The CAD data of the products with a CAD Data mark can be downloaded from: http://industrial.panasonic.com/ac/e/
External dimensions
General tolerance: ±0.5 ±.020
31.0
11.0
7.62 7.6210.16 10.16
14
0.3
3.5 .138
1.0 1.0
.039 .039
0.6 dia. .024 dia.
0.3 .012
85
4321
76
1.0
.039
0.5
.020
.300 .300.400
1.220
.400
.551
.433
.012
PC board pattern (Bottom view)
Tolerance: ±0.1 ±.004
2 coil latching
types only.
8-1.4 dia. 2.54
2.54
.100
.100
8-.055 dia.
Schematic (Bottom view)
Single side stable 2 coil latching
1 Form A 1 Form B 2 Form A 1 Form A 1 Form B 2 Form A
14
5678
–+
14
5678
–+
12
5678
–+ 34
+–
12
–+ 34
+–
5678
(Deenergized condition) (Reset condition)
CAD Data
1. PC boar d patterns for 2 coil latching
types
When applying relays in power supply
operation circuits for finished products
regulated by the Electrical Appliance and
Material Safety Law, use the pattern
shown below.
2. Soldering should be done under the
following conditions:
1)
250°C 482°F within 10s
300°C 572°F within 5s
350°C 662°F within 3s
2) For automatic cleaning, the boiling
method is recommended. Avoid
ultrasonic cleaning which subjects the
rela ys to high frequency vibrations, which
may cause the contacts to stick.
It is recommended that a fluorinated
hydrocarbon or other alcoholic solvents
be used.
3. When using, please be aware that
the a contact and b contact sides of 1
Form A and 1 Form B types may go on
simultaneously at operate time and
release time.
1Terminal No. 2 3 4
