ST
ORDERING INFORMATION
IC DRIVABLE PC BOARD
RELAY FOR INDUCTIVE
LOAD SWITCHING 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 Directive compatibility information
http://www.mew.co.jp/ac/e/environment/
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
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.
About Cd-free contacts
We have introduced Cadmium free type
products to reduce Environmental
Hazardous Substances.
(The suffix “F” should be added to the
part number)
Please replace parts containing
Cadmium with Cadmium-free products
and evaluate them with your actual
application before use because the life of
a relay depends on the contact material
and load.
Contact material
F: AgSnO2 type contact
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: UL/CSA, VDE, SEV type is standard.
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ST
TYPES
Standard packing: Tube: 50 pcs.; Case: 500 pcs.
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. allowable 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. allowable 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
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
ST
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 Refer to 6. Conditions for operation, transport and storage mentioned in AMBIENT ENVIRONMENT
REFERENCE DATA
Characteristics Item Specifications
Contact
Arrangement 1 Form A 1 Form B, 2 Form A
Contact material Au-flashed AgSnO2 type
Initial contact resistance, max. 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 “Initial 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 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 voltage applied to the coil, excluding contact bounce time.) (without diode)
Temperature rise (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 cpm)
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 20 50 100 200 300
0.1
0.2
0.5
1
2
5
10
Voltage, V
Current, A
AC resistive load
DC resistive load
inductive load
AC
(cosϕ =0.4)
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
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
ST
DIMENSIONS (Unit: mm inch)
NOTES
For Cautions for Use, see Relay Technical Information.
External dimensions
General tolerance: ±0.5 ±.020
31.0
1.220
11.0
.433
7.62
.300 7.62
.300
10.16
.400 10.16
.400
14
.551
0.3
.012
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
PC board pattern (Bottom view)
Tolerance: ±0.1 ±.004
2 coil latching
types only.
8-DIA. 1.4
.055 2.54
.100
2.54
.100
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)
1. 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.
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
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.
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
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
ST
PRECAUTIONS FOR USE (SOCKET)
ACCESSORIES ST RELAYS
SOCKET
VDE
ST relay socket
ST-PS
PC board terminal socket
ST-SS
Solder terminal socket
FEATURES
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)
RoHS Directive compatibility information
http://www.mew.co.jp/ac/e/environment/
3. Complies with Japan Electrical
Appliance and Material Safety Law.
(UL and VDE certification)
4. High breakdown voltage.
SPECIFICATIONS
DIMENSIONS (Unit: mm inch)
Item Specifications
Breakdown voltage (Initial) Between contact and coil: 4,000 Vrms for 1 min. (Detection current: 10 mA)
Between contact and terminal: 2,000 Vrms for 1 min.
Insulation resistance (Initial) Min. 1,000 MΩ between terminals (500V DC)
Heat resistance 150°C 302°F for 1 hr
Max. continuous current 10 A
Relay insertion life 15 times
ST-PS ST-SS
31.6
1.244
35.4
1.394
16.6
.654
8
1
7
2
6
3
5
4
14.6
.575
16.4
.646
10.16
.400
1.05
.041
0.3
.012 5.5
.217
4
.158
4.3
.169
0.27
.011
10.16
.400
7.62
.300 7.62
.300
31.6
1.244
35.4
1.394
16.6
.654
8
1
7
2
6
3
5
4
14.6
.575
16.4
.646
10.16
.400
2.3
.090
0.3
.012
5.5
.217
4
.158
5.3
.209
0.27
.011
10.16
.400
7.62
.300 7.62
.300
1. PC board mounting method
PC board pattern
The terminal configuration is symmetrical
on the left and right, so an arrow mark
is stamped on the socket to prevent mis-
insertion. 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.
2. Chassis cutout
Chassis cutting dimensions
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.
3. Relay mounting and removal
(1) Align the directions of the relay and
socket.
(2) Insert the relay all the way in, so it is
securely in place.
(3) Press the part indicated by A in the B
direction, and fasten by placing the hook
on the relay.
(4) When removing the relay, completely
release the hooks on both sides and pull
the relay out.
2.54
.100
8-1.5 DIA.
8-.060 DIA.
87 65
12 34 2.54
.100
Contact
terminal
interval
Coil
terminal
interval
15.0±0.2
.591±.008
32.5±0.1
1.280±.004
Claw for chassis
fastening
Chassis t = 0.6 to 2.2
.024 to .087
Press
A side
Relay
Hinge
mechanism
Relay case
cross-section
B
(Fastening complete)(Before fastening)
A
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
