VDE
IC DRIVABLE PC BOARD
RELAY FOR INDUCTIVE
LOAD SWITCHING
ST RELAYS
2. High switching capability
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.
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.
RoHS Directive compatibility information
8.To improve soldering efficiency,
preapplication of solder to the
terminals is recommended.
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.
About Cd-free contacts
FEATURES
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.
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.
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.
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
Coil voltage
DC 3, 5, 6, 9, 12, 24, 48 V
Contact material
F: AgSnO2 type contact
Note: UL/CSA, VDE, SEV type is standard.
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ST
2. Specifications
Characteristics
Item
Specifications
Arrangement
1 Form A 1 Form B, 2 Form A
Au-flashed AgSnO2 type
Contact
Contact material
Initial contact resistance, max.
Max. switching power (resistive load)
Max. switching voltage
Max. 30 mΩ (By voltage drop 6 V DC 1A)
3,040 VA, 150 W
380 V AC, 250 V DC
Max. switching current
8 A
Rating
Minimum operating power
150mW (Single side stable, 2 coil latching)
240mW (Single side stable, 2 coil latching)
100 mA 5V DC
Nominal operating power
Min. switching capacity (Reference value)*1
Insulation resistance (Initial)
(at 25°C, 50% relative humidity)
Min. 1,000MΩ (at 500V DC)
Measurement at same location as “Initial breakdown voltage” section.
Between open contacts
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)
Breakdown voltage
Between contact sets
(Initial)
Between contact and coil
Surge breakdown voltage (Initial)*2
Electrical
characteristics
Max. 15 ms [Max. 15 ms]
(Nominal voltage applied to the coil, excluding contact bounce time.)
Operate time [Set time] (at 20°C 68°F)
Release time [Reset time] (at 20°C 68°F)
Temperature rise (at 60°C 140°F)
Max. 10 ms [Max. 15 ms]
(Nominal voltage applied to the coil, excluding contact bounce time.) (without diode)
Max. 55°C
(By resistive method, nominal voltage applied to the coil; contact carrying current: 8A.)
Functional
Shock resistance
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
Destructive
Mechanical
characteristics
Functional
Vibration resistance
Destructive
Mechanical
Electrical
Min. 107 (at 180 cpm)
Min. 105 (8 A 250 V AC resistive) (ON : OFF = 1 s : 5 s)
Expected life
Ambient temperature: –40°C to +60°C –40°F to +140°F;
Conditions for operation, transport and storage*3
Max. operating speed
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Conditions
Unit weight
30 cps
Approx. 10g .353 oz
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
REFERENCE DATA
1. Max. switching power
2. Coil temperature rise
3. Influence of adjacent mounting
100
90
40
30
20
AC resistive load
10
80
5
AC
70
inductive load
(cosϕ =0.4)
Drop-out voltage
Pick-up voltage
10
0
60
Contact current 8A
2
1
50
40
30
20
10
0
0A
-10
-20
-30
-40
DC resistive load
0.5
0.2
0.1
0.2
0.4
0.6
0.8
1.0
1.2
5
10
15
20
10 20
50 100 200 300
Voltage, V
Coil operating power, W
Inter-relay distance, mm
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ST
DIMENSIONS (Unit: mm inch)
External dimensions
PC board pattern (Bottom view)
2 coil latching
types only.
14
31.0
.551
1.220
11.0
.433
0.3
.012
3.5 .138
2.54
.100
7.62
.300
10.16
.400
7.62
.300
10.16
.400
8-DIA. 1.4
.055
2.54
0.3 .012
0.6 dia. .024 dia.
1.0
.100
.039
Tolerance: 0.1 .004
1
2
7
3
4
8
6
5
0.5
.020
1.0
1.0
.039
.039
General tolerance: 0.5 .020
Schematic (Bottom view)
Single side stable
1 Form A 1 Form B 2 Form A
2 coil latching
1 Form A 1 Form B 2 Form A
1
4
1
4
5
1
2
3
4
1
2
3
4
5
–
+
–
+
– +
+ –
– +
+ –
8
7
6
5
8
7
6
8
7
6
5
8
7
6
(Deenergized condition)
(Reset condition)
NOTES
1. PC board patterns for 2 coil latching
types
2. Soldering should be done under the
following conditions:
1)
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.
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.
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.
Terminal No.
1
2
3
4
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VDE
ST RELAYS
SOCKET
ACCESSORIES
ST relay socket
3. Complies with Japan Electrical
Appliance and Material Safety Law.
(UL and VDE certification)
4. High breakdown voltage.
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.
Breakdown voltage (Initial)
ST-PS
PC board terminal socket
Insulation resistance (Initial)
Heat resistance
Min. 1,000 MΩ between terminals (500V DC)
150°C 302°F for 1 hr
10 A
Max. continuous current
Relay insertion life
15 times
DIMENSIONS (Unit: mm inch)
ST-PS
ST-SS
4
4
.158
.158
ST-SS
Solder terminal socket
16.4
.646
16.4
.646
0.3
0.3
.012
.012
5.5
5.5
5.3
4.3
.217
.217
RoHS Directive compatibility information
.209
10.16
.400
.169
10.16
.400
1.05
.041
0.27
.011
2.3
.090
0.27
.011
10.16
.400
14.6
.575
14.6
.575
10.16
.400
7.62
.300
7.62
.300
7.62
.300
7.62
.300
31.6
1.244
31.6
FEATURES
1.244
35.4
35.4
1.394
1. Possible to fit or remove the chassis
with one touch (t = 0.6 mm to 2.2 mm
.024 inch to .087 inch)
1.394
8
1
7
6
3
5
4
8
1
7
6
3
5
4
16.6
.654
16.6
.654
2. Easy design of PC board pattern
(2.54 mm x 4 pitch DIL terminal array)
2
2
PRECAUTIONS FOR USE (SOCKET)
1. PC board mounting method
2. Chassis cutout
Chassis cutting dimensions
3. Relay mounting and removal
(1) Align the directions of the relay and
PC board pattern
socket.
Relay
Contact
terminal
interval
8
7
6
5
15.0 0.2
.591 .008
Coil
terminal
interval
32.5 0.1
1.280 .004
2.54
.100
1
2
3
4
8-1.5 DIA.
Claw for chassis
fastening
Press
8-.060 DIA.
2.54
.100
(2) Insert the relay all the way in, so it is
securely in place.
A side
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
Chassis t = 0.6 to 2.2
.024 to .087
Hinge
mechanism
same arrow mark
on the component
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.
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.
(3) Press the part indicated by A in the B
direction, and fasten by placing the hook
on the relay.
Relay case
cross-section
A
(Before fastening)
(Fastening complete)
(4) When removing the relay, completely
release the hooks on both sides and pull
the relay out.
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