SF4D
1
ds_61407_en_sf4d: 130312D
SPECIFICATIONS
ORDERING INFORMATION
Polarized monostable
safety relay with forcibly
guided double contacts
SF4D
RELAY
FEATURES
• Relay complies with EN 50205, Type B
• Overvoltage category as per IEC 60664-1 III / 4kV
• Rated voltage
as per IEC 60664-1
basic insulation
33
16.5
53.3
length: 3.0
Tolerance 0.3mm
Weight approx. 47g
Coil-contact
Polution degree
2
inside
3
inside
2
outside
Contact-contact
400V 400V
400V400V 400V
250V 250V 250V
250V
forcibly linked
pair only
all other
contacts
Contact
Coil
Remarks
*1 According to EN 60947-5-1: 1997, table 4 AC15 / DC13
*2 Contact interruption <10s
*3 Breathing hole open
Characteristics
Important: Relay characteristics may be influenced by:
• strong external magnetic fields
• magnetic conductive materials near the relay
• narrow top-to-top mounting (printed surface to printed surface)
Note:
Suitable for most common washing methods except ultrasonic cleaning.
Contact configuration (a = normally open / NO,
b = normally closed / NC) 4a4b
Contact material AgSnO2, with Au flash
Contact resistance (initial at 6V DC, 1A) 30m
Making and breaking capacities (breathing
hole open)*1 6A 250V / 3A 24V
Max. switching voltage 400V
Min. switching voltage / min. switching current 10V / 10mA
Pick-up / drop-out / bounce time
(approx. values at Unominal)18.5 / 7.5 / 3ms
Mechanical life 107ops
Operate / release voltage (% of Unominal at
20°C) 75% / 15%
Pick-up/nominal power consumption at 20°C 280 / 500mW
Max. switching frequency (without load) 10Hz
Permissible ambient temperature at nominal
power consumption -40°C to +70°C
Upper temperature limit 105°C
Test voltage:
open contact / contact-contact / contact-coil
2500 / 2500 /
2500Vrms
Insulation resistance at 500V DC (initial) 109
Shock resistance (11ms) NO/NC*2 30G
Vibration resistance 10 – 200 Hz (10 – 55 Hz,
amplitude 2 mm)*2 10G
Degree of protection IP67 / IP30*3
Unit weight 47g
Ex. SF4D DC12 V
5, 9, 12, 18, 21
24, 36, 48, 60
Coil voltage (DC)
Note: Standard packing; Carton: 20 pcs. Case 200 pcs.
SF4D
2ds_61407_en_sf4d: 130312D
COIL DATA
ELECTRICAL LIFE
REFERENCE DATA
Part number Coil nominal voltage
V DC
Operate voltage
V DC
Release voltage
V DC
Coil resistance
(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% 4*2 85,000*5
250V AC 6A AC 1 0.33Hz 50% 4*2 / 8*3 100,000*5
230V AC 6A AC 1 0.33Hz 10% 2*3 200,000*4,*5
230V AC 30 / 3A AC 15*1 0.33Hz 10% 1*3 200,000*4,*5
24V DC 8A DC 1 0.33Hz 10% 2*3 200,000*4,*5
24V DC 3A DC 13*1 0.33Hz 10% 1*3 50,000*4,*5
24V DC 3A L/R = 40ms 0.33Hz 10% 1*3 100,000*4,*5
*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.
Coil voltage characteristicsLoad limit curve
-50 -40 -30 -20 -10 0 10 20 807060504030 10090 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
Ucoil / Ucoil 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.
SF4D
3
ds_61407_en_sf4d: 130312D
DIMENSIONS (mm inch)
4 Form A 4 Form B
APPLICATION NOTES
If required a breathing hole can be made in the cover by removing the nipple.
However be aware that the degree of protection will reduce from IP67 to IP30!
-50 -40 -30 -20 -10 0 10 20 807060504030 10090 110
5
10
25
20
15
Ucoil = 0%, Load on NC 5 -6
Ucoil = 100%, Load on NO 7 - 8
Ucoil = 100%, Load on all 4 NO
The curves are determined by
the contact resistance
Ambient temperature [°C]
Thermal continuous current I th [A]
Contact current characteristics
Download from our Web site.
CAD Data
CAD Data
CAD Data External dimensions
General tolerance: 0.3 .012
12.7
53.3±0.5
12.712.7
5.08
65
1817 2019
87
109
1413 1615
1
2
1211
16±0.5
12.7
7.62
7.62
3.0±0.5
0.5
33±0.5
7.62
1.0
0.48
0.48
0.30
.500
2.098±.020
.500.500
.200
.630±.020
.500
.300
.300
.118±.020
.020
1.299±.020
.300
.039 1.0
.039
.019
.019
.012
Tolerance: 0.1 .004
o
o
o o oo
o o oo
o o oo
o o oo
o
o
oo o o
o o o o
o o o o
o o o o
13
5
14
18 19
11 12
20
8
1615
76
-
2
1
+
9
17
10
Grid 2.54
2.73
7.6
1.4 - typical value for manual insertion
1.6 - typical value for automatic insertion
5.68
The contacts are shown in the deenergized condition.
Schematic (Bottom view)
PC board pattern (Bottom view)
Actuator
Nipple
Outer contact
Inner contact
Rotating armature
SF4D
4ds_61407_en_sf4d: 130312D
Operation of forcibly guided contacts, Type B
If an outer contact should weld, then the forced operated inner contacts driven by the actuator remain open.
The rotating armature remains free to move.
The unaffected contact pairs can operate normally, i.e. their function to make or break remains unaffected.
If an inner contact should weld, then the movement of the rotating armature is blocked via the actuator.
Open contacts of all four contact pairs remain open.
This arrangement corresponds to a conventional forcibly guided contact operation.
For Cautions for Use, see Relay Technical Information.
Actuator
Outer contact
Inner contact
Rotating armature
Actuator
Outer contact
Inner contact
Rotating armature
