Datasheet ST-PS, ST2-DC24V-F, ST1-DC24V-F Specification

IC DRIVABLE PC BOARD
RELAY FOR FIELD LOAD

SWITCHING

VDE

ST RELAYS

ST

31

1.220

14

.551

11.3

.445

FEATURES

• Sealed to meet the combination
process of automatic wave soldering
and cleaning needs

• Latching types available

mm inch

SPECIFICATIONS

Contacts

Arrangement
Contact material Au-flashed AgCdO

Initial contact resistance, max. 30 m

Max. switching power 2,000 VA, 150 W

Rating
(resistive)

Max. switching voltage 380 V AC, 250 V DC
Max. switching current 8 A
Min. switching capacity

#1

HP rating 1/4 HP 125, 250 V AC
Inrush current capability

Mechanical (at 180 cpm) 10

Expected
life (min.
operations)

Electrical

8 A 250 V AC
(resistive)

5 A 30 V DC (resistive)
3 A 100 V AC (lamp)
1 A 100 V AC (lamp)

Coil (polarized) (at 25°C 77°F)

Single side stable Nominal operating power Approx. 240 mW
Latching Nominal set and reset power Approx. 240 mW

#1 This value can change due to the switchi ng frequency , environmental conditio ns,

and desired reliability level, therefore it is recommended to check this with the
actual load.

Remarks

* Specifications will vary with foreign standards certification ratings.

1

Measurement at same location as “Initial breakdown voltage” section

*

2

*

Detection current: 10 mA

3

Wave is standard shock voltage of ±1.2 × 50μs according to JEC-212-1981

*

4

*

Excluding contact bounce time

5

Half-wave pulse of sine wave: 11ms; detection time: 10μs

*

6

Half-wave pulse of sine wave: 6ms

*

7

*

Detection time: 10μs

8

Refer to 6. Conditions for operation, transport and storage mentioned in

*

AMBIENT ENVIRONMENT (p. 19, Relay Technical Information).

1 Form A
1 Form B

2 Form A

Ω

100 mA, 5 V DC

51 A (TV-3 equivalence) for 1a1b

35 A (TV-1 equivalence) for 2a

7

5

10

5

2 × 10

4

3 × 10

—3

—

4

×

10

• High switching capacity and high
sensitivity in subminiature size
150 mW pick-up, 8 A inrush capacity:
51 A for 1a1b, 35 A for 2a

• High shock and vibration resistance
Shock: 20 G, Vibration: 10 to 55 Hz at
double amplitude of 2 mm

Characteristics (at 25°C 77°F 50% Relative humidity)

Max. operating speed 20 cpm (at rated load)
Initial insulation resistance*

Initial
breakdown
voltage*

Surge voltage between coil and
contact*

Operate time*

Between contact sets 2,000 Vrms
Between open contacts 1,200 Vrms

2

Between contacts and coil 3,750 Vrms

3

4

(at nominal voltage)
Release time (without diode)*

(at nominal voltage)

4

Set time*

(latching)

(at nominal voltage)

4

Reset time*

(latching)

(at nominal voltage)
Temperature rise

°

C)

(at 60
Shock

resistance

Vibration
resistance

Conditions for operation,
transport and storage*
(Not freezing and condens­ing at low temperature)

Unit weight Approx. 10g .353 oz

1

1,000 MΩ (at 500 V DC)

Max. 15 ms (Approx. 10 ms)

4

Max. 10 ms (Approx. 8 ms)

Max. 10 ms (Approx. 8 ms)

Max. 10 ms (Approx. 8 ms)

°

C with nominal coil voltage

Max. 55

and at 8 A switching current

5

6

7

Min. 196 m/s2 {20 G}

Min. 980 m/s2 {100 G}

117.6 m /s2 {12 G}, 10 to 55 Hz
at double amplitude of 2 mm

176.4 m/s
at double amplitude of 3 mm

8

Functional*
Destructive*

Functional*

Destructive
Ambient

temp.
Humidity 5 to 85% R.H.

Min. 6,000 V

2

{18 G}, 10 to 55 Hz

–40°C to +60°C

–40

°

Fto +140°F

TYPICAL APPLICATIONS

Sequence controllers, facsimiles, telephone controls, remote
control security devices and security equipment.

ds_61108_0000_en_st: 091006D

1

ST

ORDERING INFORMATION

Ex. ST

1 L2 DC48V

Contact arrangement

1: 1 Form A 1 Form B
2: 2 Form A

(Note) Standard packing: Carton; 50 pcs., Case; 500 pcs.

Operating function Coil voltage

Nil: Single side stable
L2: 2 coil latching
L: 1 coil latching

DC 3, 5, 6, 9, 12,

24, 48 V

TYPES AND COIL DATA (at 20°C 68°F)

Single side stable

Part No.

1 Form A

1 Form B
ST1-DC3V ST2-DC3V 3 2.4 0.3 4.5 38 78.9
ST1-DC5V ST2-DC5V 5 4.0 0.5 7.5 105 47.6
ST1-DC6V ST2-DC6V 6 4.8 0.6 9.0 150 40
ST1-DC9V ST2-DC9V 9 7.2 0.9 13.5 360 25
ST1-DC12V ST2-DC12V 12 9.6 1.2 18.0 600 20
ST1-DC24V ST2-DC24V 24 19.2 2.4 36.0 2,400 10
ST1-DC48V ST2-DC48V 48 38.4 4.8 72.0 9,000 5.3

2 Form A

1 coil latching

Part No.

1 Form A

1 Form B
ST1-L1-DC3V ST2-L1-DC3V 3 2.4 4.5 80 37.5
ST1-L1-DC5V ST2-L1-DC5V 5 4.0 7.5 230 21.7
ST1-L1-DC6V ST2-L1-DC6V 6 4.8 9.0 330 18.2
ST1-L1-DC9V ST2-L1-DC9V 9 7.2 13.5 730 12.3
ST1-L1-DC12V ST2-L1-DC12V 12 9.6 18.0 1,300 9.2
ST1-L1-DC24V ST2-L1-DC24V 24 19.2 36.0 5,000 4.8
ST1-L1-DC48V ST2-L1-DC48V 48 38.4 72.0 18,000 2.7

2 Form A

2 coil latching

Part No.

1 Form A

1 Form B
ST1-L2-DC3V ST2-L2-DC3V 3 2.4 4.5 40 75
ST1-L2-DC5V ST2-L2-DC5V 5 4.0 7.5 110 45.5
ST1-L2-DC6V ST2-L2-DC6V 6 4.8 9.0 155 38.7
ST1-L2-DC9V ST2-L2-DC9V 9 7.2 13.5 360 25
ST1-L2-DC12V ST2-L2-DC12V 12 9.6 18.0 640 18.8
ST1-L2-DC24V ST2-L2-DC24V 24 19.2 36.0 2,400 10
ST1-L2-DC48V ST2-L2-DC48V 48 38.4 72.0 10,200 4.7

2 Form A

Nominal
voltage,

V DC

Nominal

voltage,

V DC

Nominal
voltage,

V DC

Pick-up voltage,

V DC (max.)

Set and reset

voltage,

V DC (max.)

Set and reset

voltage,

V DC (max.)

Drop-out

voltage,

V DC (min.)

Maximum allowable voltage,

V DC (60°C

Maximum allowable voltage,

V DC (60°C

Maximum

allowable voltage,

V DC (60°C 140°F)

140°F

140°F

Coil resistance,

Ω (±10%)

)

)

Coil resistance,

Ω (±10%)

Coil resistance,

Ω (±10%)

Nominal

operating

current, mA

Nominal

operating

current, mA

Nominal

operating

current, mA

2

ds_61108_0000_en_st: 091006D

DIMENSIONS

ST

mm inch

31.0

1.220

11.0

.433

0.3

.012

3.5 .138

7.62

.300

85

10.16

.400

76

7.62

.300

4321

General tolerance: ±0.2 ±.008

PC board pattern

(Copper-side view)

2 coil latching
types only.

8-DIA. 1.4

.055

Tolerance: ±0.1 ±.004

2.54

.100

2.54

.100

14

.551

10.16

.400

Single side stable

1a1b 2a

14

–+

5678

(Deenergized condition)

Diagram shows the “reset” position when terminals 3 and 4 are
energized. Energize terminals 1 and 2 to transfer contacts.

Schematics (Bottom view)

14

–+

5678

14

+

2 coil latching

1a1b

12

–+

34

+–

5678

(Reset condition)

1 coil latching

1a1b 2a

14

-

5678

+

(Reset condition)

Diagrams show the "reset" position when
terminals 1 and 4 are energized.

2a

12–+34

+–

5678

-

5678

REFERENCE DATA

1. Max. switching power 2. Life curve 3. Coil temperature rise

10

5

2

1

Current, A

0.5

0.2

0.1

DC resistive load

10 20 50 100 200 300

AC resistive load

AC

inductive load

(cosϕ =0.4)

Voltage, V

4. Influence of adjacent mounting

Sample: ST1-DC24V

20

10

0

Rated of change, %

–10

–20

Drop-out

Pick-up

(1) & (3) relays are energized.

5 101520

Inter-relay distance, mm

(1) (2) (3)

1,000

500

200

100

50

Life, 10 k operations

20

10

AC 250 V, 125 V resistive load

AC 250 V, 125 V inductive load

123456 78910

Current, A

(Pf = 0.4)

5. Max. ambient temperature by operating
power

120

110

100

90

80

70

60

50

Max. temperature, °C

40

30

20

10

0 0.2 0.4 0.60.8 1.0 1.21.4 1.6 1.8 2.0 2.22.4

8 A carrying

Operating power, mW

No load

Sample: ST1-DC24V

60

50

40

30

Temperature rise, °C

20

10

0

0.1 0.2 0.3 0.4 0.5

6. Contact reliability

99.9

(%)

95.0

80.0

60.0

40.0

25.0

15.0

0.15

4.0

1.5

0.4

99.8

99.0

90.0

70.0

50.0

30.0

20.0

10.0

ST-Relay
250 V AC cos ϕ = 1.0

0.33 Hz

250 V AC

5.0

3.0

2.0
10 A

1.0

m = 3.9
η = 16.8×10

0.5

ρ

0.3

0.2

0.1

0.95

0.1 0.2 0.3 0.5 0.7 0.9

Coil operating power, W

= 7.7×10

0.4 0.6 0.81.0
No. of operations, ×10

Contact current

.

.

8 A
m = 3.5

4

η = 3.3×10

4

ρ

= 1.4×10

0.95

2.0 3.0 5.0 7.0 9.0

8 A
5 A
0 A

5

5

5

ds_61108_0000_en_st: 091006D

3

ST

ST relay socket

ST-SS

Solder terminal socket

DIMENSIONS

ST-PS ST-SS

7.62

.300

817

PC board terminal socket

0.3

.012

4.3

.169

1.05

.400

31.6

1.244

35.4

1.394

.041

7.62

.300

635

16.6

.654

4

10.16

2

ST-PS

0.27

.011

10.16

.400

14.6

.575

.158

5.5

.217

4

16.4

.646

Specifications

Breakdown voltage
Insulation resistance More than 1,000 MΩ between terminals

Heat resistance 150°C (302°F) for 1 hr
Max. continuous current 10 A
Relay insertion life 15 times

2.3

.090

10.16

.400

7.62

.300

817

31.6

1.244

35.4

1.394

2

7.62

.300

635

4

4,000 Vrms Coil/Contacts

2,000 Vrms Contacts/Contacts

4

.158

16.4

5.5

.217

.646

0.3

.012

5.3

.209

16.6

.654

0.27

.011

10.16

.400

14.6

.575

mm inch

Precautions for use (socket)

15.0–0.2

1. PC board mounting method

PC board pattern

Contact
terminal
interval

Coil
terminal
interval

87 65

12 34

8-1.5 DIA.

8-.060 DIA.

2.54

.100

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

32.5–0.1

1.280–.004

Press

A side

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 remova l

(1) Align the directions of the relay and socket.

.591–.008

Chassis t = 0.6 to 2.2

Relay

Claw for chassis
fastening

.024 to .087

terminal configuration becomes the
terminal nos. noted near the drilling
holes.

2. Chassis cutout

Chassis cutting dimensions

For Cautions for Use, see Relay Technical Information.

(2) Insert the relay all the way in, so it is
securely in place.

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

A

B

(Fastening complete)(Before fastening)

(4). When removing the relay, completely
release the hooks on both sides and pull the
relay out.

4

ds_61108_0000_en_st: 091006D

CADMIUM-FREE IC

DRIVABLE PC BOARD

RELAY FOR FIELD LOAD

SWITCHING

ST

VDE

ST RELAYS

(S pecial Type)

31

1.220

14

.551

11.3

.445

mm inch

FEATURES

• Sealed to meet the combination
process of automatic wave soldering
and cleaning needs

• Latching types available

• High switching capacity and high
sensitivity in subminiature size
150 mW pick-up, 8 A inrush capacity:
51 A for 1a1b, 35 A for 2a

• High shock and vibration resistance

About Cd-free contacts

We have introduced cadmium-free type
products to reduce environm entally
hazardous substances. Please replace
parts containing cadmium with Cd-free
products and evaluate them with your
actual application before use because
the life of a relay depends on the contact
material and load.

Shock: 20 G, Vibration: 10 to 55 Hz at
double amplitude of 2 mm

SPECIFICATIONS

Contacts Coil (polarized) (at 25°C 77°F)

Arrangement

1 Form A
1 Form B

2 Form A

Contact material Au-flashed AgSnO
Initial contact resistance, max. 30 m

Ω

Max. switching power 2,000 VA, 150 W

Rating
(resistive)

Expected
life (min.
operations)

Max. switching voltage 380 V AC, 250 V DC
Max. switching current 8 A
Min. switching capacity

#1

Mechanical (at 180 cpm) 10

8 A 250 V AC
(resistive)

Electrical

5 A 30 V DC (resistive)
5 A 250 V AC

cosφ = 0.4

100 mA, 5 V DC

7

5

10

5

2 × 10

—4

2

4

×

10

Single side stable Nominal operating power Approx. 240 mW
Latching Nominal set and reset power Approx. 240 mW

#1 This value can change due to the swit ching frequency , environmental condit ions,

and desired reliability level, therefore it is recommended to check this with the
actual load.

Remarks

* Specifications will vary with foreign standards certification ratings.

1

*

Measurement at same location as “Initial breakdown voltage” section

2

Detection current: 10 mA

*

3

Wave is standard shock voltage of ±1.2 × 50μs accordi ng to JEC-212-1981

*

4

*

Excluding contact bounce time

5

Half-wave pulse of sine wave: 11ms; detection time: 10μs

*

6

Half-wave pulse of sine wave: 6ms

*

7

*

Detection time: 10μs

8

Refer to 6. Conditions for operation, transport and storage mentioned in

*

AMBIENT ENVIRONMENT (p. 19, Relay Technical Information).

Characteristics (at 25°C 77°F 50% Relative humidity)

For characterisitics, please refer to the data sheet “ST RELAYS” on page 53.

ORDERING INFORMATION

Ex. ST 1 L2 DC48V

Contact arrangement

1: 1 Form A 1 Form B
2: 2 Form A

Operating function Contact materialCoil voltage

Nil: Single side stable
L2: 2 coil latching
L: 1 coil latching

(Note) Standard packing: Carton; 50 pcs., Case; 500 pcs.

REFERENCE DATA

1. Contact reliability

99.9

70
50

30
20

10

F(t), %

4

2

1

0.4

0.2

0.1
1

240

107543

No. of operations, x 10

ds_61108_0000_en_st: 091006D

s ϕ

co

5A / 250V AC /

3020

3

0.4

10060

F

DC 3, 5, 6, 9, 12, 24, 48 V F: AgSnO

type contact

2

For Cautions for Use, see Relay

Technical Information.

5