Panasonic SF4D18 PCB Mount Relay 18Vdc 4 NO / 4 NC SF4D18 Datenbogen

SF4D

2

ds_61407_0002_en_sf4d: 301105D

Part number

Coil nominal voltage 

V DC

Operate voltage 

V DC

Release voltage 

V DC

Coil resistance

Ω (

±

10%, 20°C)

Coil inductance

(mH)

SF4D-DC5V

 5

3.75

0.75

 50

47

SF4D-DC9V

 9

6.75

1.35

162

145

SF4D-DC12V

12

9.00

1.80

288

252

SF4D-DC18V

18

13.50

2.70

648

551

SF4D-DC21V

21

15.75

3.15

882

742

SF4D-DC24V

24

18.00

3.60

1152

959

SF4D-DC36V

36

27.00

5.40

2592

2097

SF4D-DC48V

48

36.00

7.20

4608

3654

SF4D-DC60V

60

45.00

9.00

7200

5612

Voltage

Current

Load type

Frequency

Duty cycle

No. of contacts

No. of ops.

230V AC

8A

AC 1

0.25Hz

25%

85,000

250V AC

6A

AC 1

0.33Hz

50%

 / 8

100,000

230V AC

6A

AC 1

0.33Hz

10%

200,000

230V AC

30 / 3A

AC 15

0.33Hz

10%

200,000

24V DC

8A

DC 1

0.33Hz

10%

200,000

24V DC

3A

0.33Hz

10%

50,000

24V DC

3A

L/R = 40ms

0.33Hz

10%

 100,000

*1 EN 60947-5-1: 1997; table C.1
*2 Breathing hole closed
*3 Breathing hole open
*4 Ambient temperature +70°C
*5 Dielectric strength according to EN61810-1:2004.

-50 -40 -30 -20 -10

0

10 20

80

70

60

50

40

30

100

90

110

Ambient temperature [°C]

0.1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

1.0

1.7

1.6

1.5

1.4

1.3

1.2

1.1

U

coil

 / U

coil rated

Permissible coil 
voltage without 
contact load 
(nominal coil 
resistance)

Minor increase due to 
temperature compensation

Average value of pick-up voltage 
without previous coil heating

Permissible coil voltage  
with contact load of 4 x 6A 
(nominal coil resistance)

Average value of drop-out voltage 
without previous coil heating

Loads in the range under the curve can be switched safely. 
The arc will extinguish before the opposite contact makes.

Permissable coil voltages and pick-up and drop-out 
characteristics at various ambient temperatures.