SFN4D
Low profile safety relay
with forcibly guided
double contacts
SFN4D
RELAY
FEATURES
53.3
33.0
• Relay complies with EN 50205, Type B
• Polarized magnet system with snap action function
• Extremely small total power loss
- Nominal coil power consumption of 390mW
- Double contacts with low contact resistance,
e.g. [(6A)
2
2.5m]
4NO = 360mW
14.5
Length: 3.0
Tolerance ±0.3 mm
Weight approx. 42 g
• Relay height, 14.5mm
• Reinforced insulation according to EN 50178
- between coil-contacts and contacts-contacts
- rated voltage of the circuits 230 / 400V or 277 / 480Vrms
- rated impulse voltage of 6kV
clearance
5.5 mm
- pollution degree 2
creepage distance
5.5mm
SPECIFICATIONS
Contact
Contact configuration (a = normally open / NO,
b = normally closed / NC)
Contact material
Contact resistance (initial at 6V DC, 1A)
Typical contact resistance
Max. switching capacity
Max. switching voltage
4a2b
AgSnO
2
, with Au flash
30m
2.5m
6A/8A
*1
250V AC
500V AC / DC
Characteristics
Max. switching frequency (without load)
Permissible ambient temperature at nominal
power consumption
*3
Upper temperature limit
Test voltage:
open contact / contact-contact / contact-coil
Insulation resistance at 500V DC (initial)
Shock resistance (11ms) NO/NC
*4
Vibration resistance 10 – 200 Hz (10 – 55 Hz,
amplitude 2 mm)
*4
Degree of protection
Unit weight
5Hz
-25°C to 92°C
105°C
2500 / 4000 /
5000V
rms
10
9
20 / 15G
10G
RT III
*5
42g
Min. switching voltage / min. switching current Reference 10V / 10mA
Pick-up / drop-out / bounce time
23 / 6
*2
/ 2ms
(approx. values at U
nominal
)
Mechanical life
10
7
ops
Coil
Operate / release
and holding at 20°C (% of U
nominal
)
*3
Pick-up/nominal power consumption
75% / 25%
min. 48%
219-236 / 390-420mW
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)
*1 See “ELECTRICAL LIFE (Reference Data)
*
” on page 2.
*2 Without diode
*3 See also “REFERENCE DATA” on page 3.
*4 Contact interruption <10s
*5 According to EN 61810-1: 2004, table 2
ORDERING INFORMATION
Ex. SFN4D
DC12 V
Coil voltage (DC)
5, 9, 12, 16, 18, 21
24, 36, 48, 60
Notes: 1) Standard packing; Tube: 10 pcs. Case 100 pcs.
2) Other coil voltage available upon request
1
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SFN4D
COIL DATA (at 20°C)
Part number
SFN4D-DC5V
SFN4D-DC9V
SFN4D-DC12V
SFN4D-DC16V
SFN4D-DC18V
SFN4D-DC21V
SFN4D-DC24V
SFN4D-DC36V
SFN4D-DC48V
SFN4D-DC60V
Coil nominal voltage V DC
5
9
12
16
18
21
24
36
48
60
Operate voltage
*1
V DC
3.75
6.75
9.00
12.00
13.5
15.75
18.00
27.00
36.00
45.00
Release voltage
*1
V DC
1.25
2.25
3.00
4.00
4.50
5.25
6.00
9.00
12.00
15.00
Coil resistance
(
10%, 20°C)
64.1
207.7
369.2
656.4
830.8
1130.8
1476.9
3085.7
5485.7
8571.4
*1 Operate and release voltage at different temperatures, see “REFERENCE DATA” on page 3, coil voltage characteristics.
SWITCHING CAPABILITY
•
•
Making / breaking capacities according to EN 60947-5-1: 2000, table 4 / 5; AC15: 6A 230V AC / DC13: 6A 24V DC
Endurance / overload test according to UL 508 16 edition, sections 42 / 43; 6A 250V AC / 6A 24V DC; B300 / R300; File E120782
ELECTRICAL LIFE (Reference Data)
*
Voltage
230V AC
230V AC
230V AC
230V AC
24V DC
250V DC
Current (A)
8
6
2.5
60 / 6
6
0.27
Load type
AC 1
AC 1
AC 1
AC 15
DC 1
DC 13
Frequency
0.25Hz
0.25Hz
0.25Hz
0.20Hz
0.25Hz
0.10Hz
Duty cycle
25%
25%
25%
20%
25%
10%
No. of contacts
4
4
4
3
4
4
No. of ops.
85,000
200,000
1,500,000
40,000
2,000,000
1,000,000
*Test conditions: Room temperature, breathing hole closed, dielectric strength according to EN61810-1:2004.
DIMENSIONS
Outer dimensions
CAD Data
53.3
Breathing hole
0.3 Stand-off
33
CAD
Data
Download
CAD
Data
from our Web site.
1
5.4
15
12.5
15
5.4
0.3 (2x)
3.34
General tolerance:
0.3
Projection mode:
12.5 7.5 7.5
0.48 (12x)
(2.16)
Schematic (Bottom view)
9
7
5
+1
10
8
6
15
13
11
16
3
14.5
PC board pattern (Bottom view)
53.3
5.4
15
12.5
15
14
12
2-
33
12.5 7.5 7.5
3.34
1.4 dia., typical value for manual insertion
1.6 dia., typical value for automatic insertion
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2
SFN4D
REFERENCE DATA
Coil voltage characteristics
170
160
150
140
130
120
permissible coil voltage
without contact load
Coil applied voltage [%]
110
100
90
80
70
60
50
40
30
20
10
-30
-20
-10
0
operative range of the coil voltage
typical
operate
and
release
voltage with the +/-3σ range
without preheated coil
min. recommended
holding voltage
min. release voltage at the end of the electrical life
10
20
30
40
50
60
70
80
90
100 110
Ambient temperature [
o
C]
Thermic operating range
170
160
150
140
130
120
4 NO contacts
simultaneously
Switching time in relation to coil excitement at 20°C
170
4 x 8A
4 x 6A
4 x 0A
160
To the right of the curves
the relay operates in a
temperature range exceeding
the stated limit of 105
o
C
150
140
Coil applied voltage [%]
Coil applied voltage [%]
110
100
90
80
70
60
50
130
bbm
120
110
100
90
40
30
20
10
0
40
50
60
70
80
90
100
110
70
60
0
10
20
30
40
50
60
80
NC 1
NO 4
Ambient temperature
[
o
C]
Typ. pick-up time [ms]
3
ds_61408_en_sfn4d: 170114D
SFN4D
REFERENCE DATA, continued
Load limit curve
500
300
200
300 W
250 W
Contact voltage [VDC]
200 W
100
70
50
150 W
100 W
80 W
60 W
30
20
10 W
20 W
40 W
10
0.1
0.2
0.3
0.5
0.7
1
2
3
4
5 6 7 8 10
Contact current [A]
Time / current characteristic
10000
1000
Fuse-link D II 6A , 500 V
operating class gL
(6A gG) DIN 49 515
Current [A]
100
SFN4D, Contact withstand current
10
Fuse-link 6,3A F (quick acting)
glass tube 5 x 20 mm, 250V
IEC 60 127-2/2
1
0.001
0.01
0.1
1
10
100
1000
10000
100000
Time [Sec]
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4
SFN4D
APPLICATION NOTES
The SFN4D Safety Relay
NC contact 5-6
Sub card 1
NO contact 7-8
Sub card 2
NO contact 9-10
Armature
NO contact 12-11
Main card
NO contact 14-13
NC contact 16-15
5
6
Remark:
Only NC 5-6 monitors
all NO contacts!
7
8
9
10
12
11
14
13
16
15
Legend for interpreting contact conditions
Contact
Condition
Closed
NC (Normally Closed)
Fully open
Open
Open or closed
Closed
NO (Normally Open)
Fully open
Open
Open or closed
Symbol
Contact gap
0
Maximum
(~1.5mm)
>0.5mm
(forcibly guided)
Not defined
0
Maximum
(~1.5mm)
>0.5mm
(forcibly guided)
Not defined
The SFN4D under normal operating conditions
Condition
- Coil deenergized.
- Armature in deenergized
position.
- NC contacts closed.
- NO contacts have a contact
gap of approx. 1.5mm.
Illustration of Relay State
Condition of Contacts
5
6
7
8
9
10
12
11
14
13
16
15
- Coil energized.
- Armature in energized
position.
- NO contacts closed.
- NC contacts have a contact
gap of approx. 1.5mm.
5
6
7
8
9
10
12
11
14
13
16
15
5
ds_61408_en_sfn4d: 170114D
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