NAIS SF2-DC12V, SF2-DC18V, SF2-DC21V, SF2-DC24V, SF2-DC36V Datasheet

SF

π

53.3±0.3

2.098±.012

53.3±0.3

2.098±.012

53.3±0.3

2.098±.012

25.0

.984

16.5±0.3

.650±.012

33±0.3

1.299±.012

16.5±0.3

.650±.012

POLARISED, MONOSTABLE
SAFETY RELAY with
(mechanical linked) forced
contacts operation

FEATURES

• Forced operation contacts (2 Form A
2 Form B, 3 Form A 1 Form B)

25.0

.984

16.5±0.3

.650±.012

mm inch

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 a min. 0.5mm .020inch contact
gap.

• Independent operation contacts
(4 Form A 4 Form B)

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

(SF3 pending) (SF3 pending) (SF3 pending)

SF-RELA YS

enables to plan a circuit to detect welding
or go back to the beginning condition.

• Separated chamber structure
(2 Form A 2 Form B, 3 Form A 1 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.

• UL/CSA, TÜV, SEV approved

(UL/CSA, SEV of SF3 pending)

SPECIFICATIONS

Contact

Type SF2 SF3 SF4
Arrangement

2 Form A
2 Form B

Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)

Contact material Gold-flashed silver alloy

Rating
(resistive)

Nominal switching
capacity

Max. switching power 1,500 VA, 180 W
Max. switching voltage 30 V DC, 440 V AC

6 A 250 V AC, 6 A 30 V DC

Max. carrying current 6 A DC, AC

Expected
life (min.
operations)

Coil (at 25°C

Mechanical (at 180
cpm) (resistive)

Electrical (at 20 cpm)

77°F

)

Nominal operating power 500 mW

Remarks

* Specifications will vary with foreign standards certification ratings.

*1

More than 10
side of contact pairs of each Form A contact and Form B contact

*2

Measurement at same location as " Initial breakdown voltage " section

*3

Detection current: 10mA

*4

Excluding contact bounce time

*5

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

*6

Half-wave pulse of sine wave: 6ms

*7

Detection time: 10 µ s

*8

Refer to 5. Conditions for operation, transport and storage mentioned in

AMBIENT ENVIRONMENT (Page 61).

5

operations when applying the nominal switching capacity to one

3 × 10

3 Form A
1 Form B

30 m Ω

7

10

4

1

*

4 Form A
4 Form B

10

Characteristics (at 25°C

77°F

, 50% Relative humidity)

SF2 SF3 SF4
Max. operating speed 180 cpm (at nominal voltage)
Initial insulation resistance*

2

Between con­tact sets

Initial break­down voltage*

Between open

3

contacts
Between con-

tact and coil

Operate time*

4

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

(at nominal voltage)

5

Temperature rise
(at nominal voltage)

Shock

resistance

Vibration
resistance

Conditions for oper­ation, transport and

8

storage*
(Not freezing and
condensing at low
temperature)

Functional*
Destructive*

Functional*
Destructive

Ambient
temp.

Humidity 5 to 85% R.H.

5

7

Min. 1,000 M Ω at 500 V DC

2,500 Vrms
2,500 Vrms
2,500 Vrms

Approx. 17 ms Approx. 18 ms

4

Approx. 7 ms Approx. 6 ms

Max. 45 ° C with nominal coil voltage

and at 6 A switching current

2

{30 G}

2

{100 G}

2

{12 G}, 10 to 55 Hz

5

Min. 294 m/s

Min. 980 m/s

117.6 m/s
at double amplitude of 2 mm

2

117.6 m/s

{12 G}, 10 to 55 Hz

at double amplitude of 2 mm

–40 ° C to +70 ° C –40°F to +158°F

Unit weight 37 g 1.31 oz 47 g 1.66 oz

ORDERING INFORMATION

Ex. SF 2 DC 12 V

Contact arrangement Coil voltage
2: 2 Form A 2 Form B

3: 3 Form A 1 Form B
4: 4 Form A 4 Form B

UL/CSA, TÜV, SEV approved type is standard (SF2, SF4)
TÜV approved type is standard (SF3)

258

DC 5, 9, 12, 18, 21,
24, 36, 48, 60 V

TYPICAL APPLICATIONS

• Signal

• Escalator

• Elevator

• Medical Instruments

• Railway

• Factory Automation

Ω ( ±

TYPES AND COIL DATA (at 20°C 68°F)

Contact

arrangement

SF2

SF3

SF4

Part No.

Nominal

voltage, V DC

Pick-up

voltage, VDC

(max.)

SF2-DC5V 5 3.75 0.5 50 100 500 6
SF2-DC9V 9 6.75 0.9 500 10.8
SF2-DC12V 12 9 1.2 288 41.7 500 14.4
SF2-DC18V 18 13.5 1.8 500 21.6
SF2-DC21V 21 15.75 2.1 500 25.2
SF2-DC24V 24 14.4 2.4 1.152 20.8 500 28.8
SF2-DC36V 36 27 3.6 500 43.2
SF2-DC48V 48 36 4.8 4.608 10.4 500 57.6
SF2-DC60V 60 45 6.0 7.200 8.3 500 72
SF3-DC5V 5 3.75 0.5 50 100 500 6
SF3-DC9V 9 6.75 0.9 500 10.8
SF3-DC12V 12 9 1.2 288 41.7 500 14.4
SF3-DC18V 18 13.5 1.8 500 21.6
SF3-DC21V 21 15.75 2.1 500 25.2
SF3-DC24V 24 14.4 2.4 1.152 20.8 500 28.8
SF3-DC36V 36 27 3.6 500 43.2
SF3-DC48V 48 36 4.8 4.608 10.4 500 57.6
SF3-DC60V 60 45 6.0 7.200 8.3 500 72
SF4-DC5V 5 3.75 0.75 50 100 500 6
SF4-DC9V 9 6.75 0.9 500 10.8
SF4-DC12V 12 9 1.8 288 41.7 500 14.4
SF4-DC18V 18 13.5 1.8 500 21.6
SF4-DC21V 21 15.75 2.1 500 25.2
SF4-DC24V 24 14.4 3.6 1.152 20.8 500 28.8
SF4-DC36V 36 27 3.6 500 43.2
SF4-DC48V 48 36 7.2 4.608 10.4 500 57.6
SF4-DC60V 60 45 9.0 7.200 8.3 500 72

Drop-out

voltage, V DC

(min.)

Coil

resistance

10%)

Nominal

operating

current,

mA( ± 10%)

Nominal

operating

power, mW

SF

Max. allowable

voltage, V DC

DIMENSIONS

1) SF2

25.0

.984

7.62

.300

5.08

.200

12.7

12.7

.500

.500

53.3±0.3

2.098±.012

6587

1

2

109

General tolerance: ±0.3 ±.012

12.7

.500

3.5±0.3

.138±.012

1211

16±0.3

.630±.012

0.5

.020

12.7

.500

Schematic (Bottom view)

5

1

2

678

9 101112

PC board pattern (Bottom view)

10-1.4 DIA. HOLES

2.54

10-.055 DIA. HOLES

2.54

.100

.100

Tolerance: ±0.1 ± .004

mm

inch

259

SF

-40 -20 0
20

40 60 80

-50

100

50

-100

Rate of

change, %

Ambient
temperature, °C

Pick-up
voltage

Drop-out
voltage

12.7

.500

53.3±0.3

2.098±.012

12.7

.500

12.7

.500

5.08

.200

6587

109

1

2

1211

16±0.3

.630±.012

12.7

.500

3.5±0.3

.138±.012

0.5

.020

25.0

.984

7.62

.300

5678

9 101112

1

2

2.54

.100

2.54

.100

10-1.4 DIA. HOLES

10-.055 DIA. HOLES

General tolerance: ±0.3 ±.012

PC board pattern (Bottom view)

Schematic (Bottom view)

Tolerance: ±0.1 ±.004

2) SF3

3) SF4

mm

inch

3.5±0.3

12.7

12.7

33±0.3

1.299±.012

7.62

.300

5.08

.200

12.7

.500

.500

53.3±0.3

2.098±.012

1413 1615

65

1

2

109
1817 2019

.500

.138±.012

87

1211

General tolerance: ±0.3 ±.012

REFERENCE DATA

1. Operate/release time 2. Coil temperature rise

Coil applied voltage: 120%V
Contact switching current: 6A

16±0.3

.630±.012

0.3

.012

7.62

.300

12.7

.500

7.62

.300

Schematic (Bottom view)

13

14615716

1

5
9171018111912

2

8

20

PC board pattern (Bottom view)

18-1.4 DIA. HOLES

18-.055 DIA. HOLES

2.54

.100

2.54

.100

Tolerance: ±0.1 ±.004

3. Ambient temperature characteristics

Tested sample: SF4-DC12V
Quantity: n = 6

50

40

30

20

Operate/release time, ms

10

0

260

Operate time

80 10090 120110

Release time

Coil applied voltage, %V

Max.
x
Min.

Max.
x
Min.

60

50

40

30

Temperature rise, °C

20

10

0

Inside the coil

Contact

30 50 70

Ambient temperature, °C