1a1b/2a 8A polarized power
relays
RoHS compliant
Protective construction: Sealed type
FEATURES
1. Even with small form factor,
sensitive enough for direct ICdriving
The dimensions of this high-density 4gap 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 highefficiency 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.
2. High switching capability
High contact pressure, low contact
bounce, and forced separation
structure that radically improves
resistance to contact welding
(1 Form 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
achieved. Between contacts and coil of
3,750 Vrms; Surge breakdown voltage
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
.118 inch 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.
ST RELAYS
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 for PC board and soldering
are available
ORDERING INFORMATION
ST
F
Contact arrangement
1: 1 Form A 1 Form B
2: 2 Form A
Operating function
Nil: Single side stable
L2: 2 coil latching
Nominal coil voltage
DC 3, 5, 6, 9, 12, 24, 48 V
Contact material
F: AgSnO2 type contact
–1–
ASCTB210E 201701-T
ST
TYPES
Contact arrangement
Nominal coil voltage
1 Form A 1 Form B
2 Form A
3V DC
5V DC
6V DC
9V DC
12V DC
24V DC
48V DC
3V DC
5V DC
6V DC
9V DC
12V DC
24V DC
48V DC
Single side stable
Part No.
ST1-DC3V-F
ST1-DC5V-F
ST1-DC6V-F
ST1-DC9V-F
ST1-DC12V-F
ST1-DC24V-F
ST1-DC48V-F
ST2-DC3V-F
ST2-DC5V-F
ST2-DC6V-F
ST2-DC9V-F
ST2-DC12V-F
ST2-DC24V-F
ST2-DC48V-F
2 coil latching
Part No.
ST1-L2-DC3V-F
ST1-L2-DC5V-F
ST1-L2-DC6V-F
ST1-L2-DC9V-F
ST1-L2-DC12V-F
ST1-L2-DC24V-F
ST1-L2-DC48V-F
ST2-L2-DC3V-F
ST2-L2-DC5V-F
ST2-L2-DC6V-F
ST2-L2-DC9V-F
ST2-L2-DC12V-F
ST2-L2-DC24V-F
ST2-L2-DC48V-F
Standard packing: Carton: 50 pcs.; Case: 500 pcs.
* Terminal sockets available.
RATING
1. Coil data
1) Single side stable
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)
3V DC
75mA
38Ω
5V DC
6V DC
9V DC
12V DC
24V DC
48V DC
47mA
40mA
25mA
20mA
10mA
4.7mA
105Ω
150Ω
360Ω
600Ω
2,400Ω
9,000Ω
80%V or less of
nominal voltage
(Initial)
10%V or more of
nominal voltage
(Initial)
Set voltage
(at 20°C 68°F)
Reset voltage
(at 20°C 68°F)
Nominal operating
power
Max. applied voltage
(at 20°C 68°F)
Approx. 240mW
150%V of
nominal voltage
2) 2 coil latching
Nominal coil
voltage
3V DC
5V DC
6V DC
9V DC
12V DC
24V DC
48V DC
80%V or less of
nominal voltage
(Initial)
80%V or less of
nominal voltage
(Initial)
Nominal operating
current
[±10%] (at 20°C 68°F)
Set coil
Reset coil
Coil resistance
[±10%] (at 20°C 68°F)
Set coil
Reset coil
75mA
75mA
40Ω
40Ω
45mA
37.5mA
25mA
18.8mA
10mA
4.7mA
45mA
37.5mA
25mA
18.8mA
10mA
4.7mA
110Ω
155Ω
360Ω
640Ω
2,400Ω
10,200Ω
110Ω
155Ω
360Ω
640Ω
2,400Ω
10,200Ω
–2–
Nominal operating
power
Set coil
Reset coil
Approx.
240mW
Approx.
240mW
Max. applied voltage
(at 20°C 68°F)
150%V of
nominal voltage
ASCTB210E 201701-T
ST
2. Specifications
Characteristics
Contact
Rating
Item
Arrangement
Contact material
Contact resistance (Initial)
Max. switching power (resistive load)
Max. switching voltage
Max. switching current
Min. switching capacity (Reference value)*1
Specifications
1 Form A 1 Form B, 2 Form A
Au-flashed AgSnO2 type
Max. 30 mΩ (By voltage drop 6 V DC 1A)
3,040 VA, 150 W
380 V AC, 250 V DC
8A
100 mA 5V DC
Insulation resistance (Initial)
(at 25°C, 50% relative humidity)
Min. 1,000MΩ (at 500V DC)
Measurement at same location as “Breakdown voltage” section.
Between open contacts
Between contact sets
Between contact and coil
Surge breakdown voltage (Initial)*2
1,200 Vrms for 1 min. (Detection current: 10 mA)
2,000 Vrms for 1 min. (Detection current: 10 mA)
3,750 Vrms for 1 min. (Detection current: 10 mA)
6,000 V (Between contact and coil)
Max. 15 ms [Max. 15 ms]
(Nominal coil voltage applied to the coil, excluding contact bounce time.)
Max. 10 ms [Max. 15 ms]
(Nominal coil voltage applied to the coil, excluding contact bounce time.) (without diode)
Min. 196 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10μs.)
Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.)
10 to 55 Hz at double amplitude of 2 mm (Detection time: 10μs.)
10 to 55 Hz at double amplitude of 3 mm
Min. 107 (at 180 times/min.)
Ambient temperature: –40°C to +60°C –40°F to +140°F;
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Approx. 10g .353 oz
Breakdown voltage
(Initial)
Electrical
characteristics
Operate time [Set time] (at 20°C 68°F)
Release time [Reset time] (at 20°C 68°F)
Expected life
Functional
Destructive
Functional
Vibration resistance
Destructive
Mechanical
Conditions
Conditions for operation, transport and storage*3
Shock resistance
Mechanical
characteristics
Unit weight
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.
3. Electrical life
Condition: Resistive load , ON : OFF=1s : 5s
Types
1 Form A 1 Form B, 2 Form A
Switching capacity
8A 250V AC
No. of operations
Min. 1×105
REFERENCE DATA
2. Coil temperature rise
10
Current, A
5
AC inductive
load
(cosϕ=0.4)
2
DC resistive
load
1
0.5
Temperature rise, °C
AC resistive load
DC inductive
load
(L/R=40ms)
3. Influence of adjacent mounting
100
40
90
30
Rated of change, %
1. Max. switching power
80
70
60 Contact current 8A
50
0A
40
30
0
Pick-up voltage
-10
-20
-30
10
20
Drop-out voltage
10
20
0.2
0
20
50
100 200 300
Voltage, V
600 1000
0
0.2
0.4
0.6
0.8
1.0
Coil operating power, W
–3–
1.2
-40
5
10
15
20
Inter-relay distance, mm
ASCTB210E 201701-T
ST
DIMENSIONS (mm inch)
The CAD data of the products with a
CAD Data
mark can be downloaded from: http://industrial.panasonic.com/ac/e/
External dimensions
CAD Data
PC board pattern (Bottom view)
2 coil latching
types only.
14
.551
31.0
1.220
11.0
.433
0.3
.012
3.5 .138
7.62
.300
10.16
.400
1.0
.039
1
8
2.54
.100
7.62
.300
0.3 .012
0.6 dia. .024 dia.
2
3
7
6
10.16
.400
8-1.4 dia.
8-.055 dia.
2.54
.100
Tolerance: ±0.1 ±.004
4
5
0.5
.020
1.0
.039
1.0
.039
General tolerance: ±0.5 ±.020
Schematic (Bottom view)
Single side stable
1 Form A 1 Form B
2 Form A
1
8
–
+
7
6
4
1
5
8
–
2 coil latching
1 Form A 1 Form B
2 Form A
+
7
6
4
1
5
8
– +
2
3
7
6
(Deenergized condition)
+ –
4
1
5
8
– +
2
3
7
6
+ –
4
5
(Reset condition)
SAFETY STANDARDS
UL (Recognized)
Contact rating
8A 250V AC
E43028
5A 30V DC
1/4HP 125, 250V AC
File No.
CSA (Certified)
Contact rating
8A 250V AC
LR26550
5A 30V DC
1/4HP 125, 250V AC
File No.
VDE (Certified)
Contact rating
8A 250V AC (cosφ =1.0)
40017740 5A 30V DC (0ms)
4A 250V AC (cosφ =0.4)
File No.
TV rating (UL/CSA)
File No.
Rating
UL: E43028
TV-3
CSA: LR26550
TV-3
EN/IEC VDE Certified
INSULATION CHARACTERISTICS (IEC61810-1)
Item
Clearance/Creepage distance (IEC61810-1)
Category of protection (IEC61810-1)
Tracking resistance (IEC60112)
Insulation material group
Over voltage category
Rated voltage
Pollution degree
Type of insulation (Between contact and coil)
Type of insulation (Between open contacts)
Characteristics
Min. 1.5/2.5mm
RT III
PTI 100
III a
II
250V
2
Basic insulation
Micro disconnection
–4–
ASCTB210E 201701-T
ST
NOTES
1. For cautions for use, please read
“GENERAL APPLICATION
GUIDELINES”.
2. PC board 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.
Terminal No. 1
2
3
3. 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
relays to high frequency vibrations, which
may cause the contacts to stick.
It is recommended that a fluorinated
hydrocarbon or other alcoholic solvents
be used.
4. When using, please be aware that
the a contact and b contact sides of
1 Form A 1 Form B type may go on
simultaneously at operate time and
release time.
4
–5–
ASCTB210E 201701-T
ST RELAYS
TERMINAL SOCKETS
ACCESSORIES
SPECIFICATIONS
Item
Specifications
Between contact and coil: 4,000 Vrms for 1 min. (Detection current: 10 mA)
Between contact and terminal: 2,000 Vrms for 1 min.
Min. 1,000 MΩ between terminals (500V DC)
150°C 302°F for 1 hr
10 A
15 times
Breakdown voltage (Initial)
Insulation resistance (Initial)
Heat resistance
Max. continuous current
Relay insertion life
Terminal socket
for PC board
Terminal socket
for soldering
DIMENSIONS (mm inch)
The CAD data of the products with a CAD Data mark
can be downloaded from: http://industrial.panasonic.com/ac/e/
Terminal socket for PC board
RoHS compliant
Terminal socket for soldering
CAD Data
CAD Data
TYPES
4
.158
Product name
Terminal socket for PC board
Terminal socket for soldering
4
.158
16.4
.646
Part No.
ST-PS
ST-SS
FEATURES
7.62
.300
1. Possible to fit or remove the chassis
with one touch (t = 0.6 mm to 2.2
mm .024 inch to .087 inch)
2. Easy design of PC board pattern
(2.54 mm x 4 pitch DIL terminal array)
3. High breakdown voltage.
10.16
.400
31.6
1.244
1.05
.041
0.3
.012
4.3
.169
0.27
.011
7.62
.300
10.16
.400
14.6
.575
16.4
.646
0.3
.012
5.3
.209
5.5
.217
7.62
.300
35.4
1.394
8
7
6
5
10.16
.400
31.6
1.244
35.4
1.394
2.3
.090
0.27
.011
2
3
5.5
.217
14.6
.575
7.62
.300
8
7
6
5
1
2
3
4
16.6
.654
1
10.16
.400
16.6
.654
4
PRECAUTIONS FOR USE (SOCKET)
Contact
terminal
interval
Coil
terminal
interval
8
7
6
5
1
2
3
4
8-1.5 dia.
8-.060 dia.
3. Relay mounting and removal
(1) Align the directions of the relay and
socket.
Relay
2. Chassis cutout
Chassis cutting dimensions
1. PC board mounting method
PC board pattern
15.0±0.2
.591±.008
32.5±0.1
1.280±.004
2.54
.100
Press
2.54
.100
The terminal configuration is symmetrical
on the left and right, so an arrow mark
is stamped on the socket to prevent misinsertion. We recommend printing the
same arrow mark
on the component
mounting side (side opposite from
pattern) of the PC board. In this case, the
terminal configuration becomes the
terminal nos. noted near the drilling
holes.
Claw for chassis
fastening
A side
(2) Insert the relay all the way in, so it is
securely in place.
Chassis t = 0.6 to 2.2
.024 to .087
If the chassis hole is punched with a
press, set so the release R on the front
side (A side).
The range for chassis thickness is 0.6 to
2.2 mm .024 to .087 inch.
Hinge
mechanism
(3) Press the part indicated by A in the B
direction, and fasten by placing the hook
on the relay.
Relay case
cross-section
B
(Before fastening)
A
(Fastening complete)
(4) When removing the relay, completely
release the hooks on both sides and pull
the relay out.
–1–
ASCTB211E 201701-T
