4

SF-RELAYS

Double contact

POLARISED, MONOSTABLE

SAFETY RELAY

25.0

.984

2 Form A 2 Form B

4 Form A 4 Form B

16.5

±0.5

.650

±.020

53.3

±0.3

2.098

±.012

33

±0.5

1.299

±.020

16.5

±0.5

.650

±.020

53.3

±0.3

2.098

±.012

FEATURES

• High contact reliability

High contact reliability is achieved through

the use of a double contact.

• Forced operation contacts

(2 Form A 2 Form B)

N.O. and N.C. side contacts are

connected through a card so that one

interacts with the other in movement. In

case of a contact welding, the other keeps

• Independent operation contacts

(4 Form A 4 Form B)

There are 4 points of forced operation

contacts.

Each pair of contacts is free from the main

armature and is independent from each

other. So if a N.O. pair of contacts are

welded, the other 3 N.O. contacts are not

effected (operate properly) That enables

to plan a circuit to detect welding or go

back to the beginning condition.

• Separated chamber structure (2 Form

A 2 Form B, 4 Form A 4 Form B)

N.O. and N.C. side contacts are put in

each own space surrounded with a card

and a body-separater.That prevents short

circuit between contacts, which is caused

by their springs welding or damaged.

• High breakdown voltage 2,500 Vrms

between contacts and coil

• High sensitivity

Realizes thin shape and high sensitivity

(500 mW nominal operating power) by

utilizing high-efficiency polarized

magnetic circuit with 4-gap balanced

armature.

• Complies with safety standards

Standard products are UL, CSA, TÜV and

SEV certified. Comform to European

standards. TÜV certified (945/EL, 178/

88). Complies with SUVA European

standard.

SPECIFICATIONS

Contact

Coil

Remarks

* Specifications will vary with foreign standards certification ratings.

µs

µs

Characteristics

Contact arrangement

2 Form A

2 Form B

4 Form A

4 Form B

Initial contact resistance, max.

(By voltage drop 6 V DC 1 A)

30 m

Ω

Contact material

Gold-flashed silver alloy

Rating

(resistive)

Nominal switching

capacity

6 A 250 V AC, 6 A 30 V DC

Max. switching power

1,500 VA, 180 W

Max. switching voltage

440 V AC, 30 V DC

Max. carrying current

6 A

Expected

life (min.

operations)

Mechanical (at 180 cpm)

Electrical (at 20 cpm)

Nominal operating power

500 mW

Contact arrangement

2 Form A

2 Form B

4 Form A

4 Form B

Max. operating speed

180 cpm (at nominal voltage)

Min. 1,000 M

Ω at 500 V DC

Initial

breakdown

Between open contacts

1,300 Vrms

Between contact sets

2,500 Vrms

Between contact and coil

2,500 Vrms

Approx. 17 ms Approx. 18 ms

(at nominal voltage)

Approx. 7 ms

Approx. 6 ms

Temperature rise (at nominal voltage)

(at 20°C)

Max. 45°C

with nominal coil voltage and

at 6 A carry current

Shock resistance

Vibration resistance

10 to 55 Hz at double

amplitude of 2 mm

Destructive

10 to 55 Hz at double

amplitude of 2 mm

Conditions for operation,

freezing and condensing at

low temperature)

Ambient

temp.

–40°C to +70°C

–40°F to +158°F

Humidity

5 to 85% R.H.

Unit weight

Approx.

Approx.

(pending)