SFS
1
ds_61410_en_sfs: 170413D
SPECIFICATIONS
Contact
#1 This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load.
Slim compact safety relay SF-RELAYS
Slim type
Item 4 poles 6 poles
Contact arrangement 2 Form A/2 Form B
3 Form A/1 Form B 4 Form A/2 Form B
5 Form A/1 Form B
3 Form A/3 Form B
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A) 100 m
Contact material Gold-flashed AgSnO2 type
Rating (resistive load)
Nominal switching capacity 6 A 250 V AC, 6 A 30 V DC
Max. switching power 1,500 VA, 180 W
Max. switching voltage 250 V AC, 30 V DC
Max. switching current 6 A (Reduce by 0.1 A/C for temperatures 70 to 85C.)
Min. switching capacity
(Reference value) #1 1 mA 5 V DC
Expected life
(min. operations)
Mechanical (at 180 times/min.) 107
Electrical
250 V AC 6 A resistive load: 105 (at 20 times/min.)
30 V DC 6 A resistive load: 105 (at 20 times/min.)
250 V AC 1 A resistive load: 5105 (at 30 times/min.)
30 V DC 1 A resistive load: 5105 (at 30 times/min.)
[AC 15] 240 V AC 2 A inductive load: 105 (at 20 times/min., cos = 0.3)
[DC 13] 24 V DC 1 A inductive load: 105 (at 20 times/min., L/R = 48 ms)
FEATURES
• Forcibly guide contact structure
(EN50205 Class A TÜV recognized)
• Slim profile (mm inch)
Compact size with slim profile relay
reduces substrate size.
[4-pole type]40 (L)13 (W)24 (H)
1.575 (L).512 (W).945 (H)
[6-pole type]50 (L)13 (W)24 (H)
1.969 (L).512 (W).945 (H)
• Built-in LED indication type available
Built-in LED eliminates need for design
and mounting of separate LED circuit.
This cuts costs and saves labor.
• Fast response time is achieved
(8 ms or less)
Circuit is quickly opened to ensure
safety.
• High shock resistance
(Functional: Min. 200m/s2)
Improved anti-shock properties
meaning that the relay can be safely
used in high shock and vibration
environments such as in machine tools
and other factory equipment.
• PC board sockets also available
(4 and 6-poles)
• Lineup also includes DIN terminal
socket with finger protect construction
(4 and 6-poles)
TYPICAL
APPLICATIONS
• Machine tools
• Robots
• Safety PLCs
• Circuits with stringent safety standard
requirements such as those in motor
vehicle production equipment.
Max. 13
Max. 24
Max. 40 .512
.945
1.575
Max. 13
Max. 24
Max. 50
.512
.945
1.969
mm inch
SFS
2ds_61410_en_sfs: 170413D
Coil
Characteristics (at 20C 68F)
• Outline of performance [Socket for PC board/DIN terminal socket]
Remarks
*1 Measurement at same location as “Initial breakdown voltage” section
*2 Detection current: 10mA
*3 Excluding contact bounce time
*4 Response time is the time after the coil voltage turns off until the time when “a” contact turns off.
*5 Half-wave pulse of sine wave: 11ms; detection time: 10s
*6 Half-wave pulse of sine wave: 6ms
*7 Detection time: 10s
*8 Refer to “NOTES” on page 6, 7. Usage, transport and storage conditions.
ORDERING INFORMATION
4 poles 6 poles
2 Form A/2 Form B
3 Form A/1 Form B 4 Form A/2 Form B
5 Form A/1 Form B
3 Form A/3 Form B
Nominal operating power 360 mW 500 mW
Item
4 poles 6 poles
2 Form A/2 Form B
3 Form A/1 Form B 4 Form A/2 Form B
5 Form A/1 Form B
3 Form A/3 Form B
Max. operating speed 20 times/min. (at nominal voltage)
Initial insulation resistance*1Min. 1,000 M at 500 V DC
Initial breakdown voltage*2
Between open contacts 1,500 Vrms for 1 min.
Between contact sets
2,500 Vrms for 1 min.:
7-8/9-10
2,500 Vrms for 1 min.:
7-8/11-12
9-10/13-14
11-12/13-14
4,000 Vrms for 1 min.:
3-4/5-6
3-4/7-8
5-6/9-10
4,000 Vrms for 1 min.:
3-4/5-6
3-4/7-8
5-6/9-10
7-8/9-10
Between contact and coil 4,000 Vrms for 1 min.
Operate time (at nominal voltage) Max. 20 ms*3
Response time*4 (without diode)
(at nominal voltage) Max. 8 ms*3
Release time (without diode)
(at nominal voltage) Max. 20 ms*3
Shock resistance Functional*5Min. 200 m/s2
Destructive*6Min. 1,000 m/s2
Vibration resistance Functional*710 to 55 Hz at double amplitude of 1.5 mm
Destructive 10 to 55 Hz at double amplitude of 1.5 mm
Conditions for operation, transport and
storage*8 (Not freezing and condensing at
low temperature)
Ambient temp. –40C to +85C –40F to +185F
Humidity 5 to 85% R.H.
Unit weight Approx. 20 g Approx. .71 oz Approx. 23 g Approx. .81 oz
Max. carrying current 6 A (Reduce by 0.1 A/C for temperatures 70 to 85C.)
Initial breakdown voltage Between each terminal: 2,500 Vrms for 1 min. (Detection current: 10mA)
Initial insulation resistance*1Min. 1,000 M at 500V DC
Ex. SF
Product name
Slim type
Note: Standard packing: Carton 50 pcs. Case 200 pcs. (Accessories: Carton 10 pcs. Case 100 pcs.)
Please inquire about other coil voltages.
Contact arrangement
2: 2 Form A/2 Form B
3: 3 Form A/1 Form B
4: 4 Form A/2 Form B
5: 5 Form A/1 Form B
6: 3 Form A/3 Form B
Nil:
L:
Without LED indication
With LED indication
Operation indication Coil voltage
DC12, 16, 18,
21, 24, 48V
S
SFS
3
ds_61410_en_sfs: 170413D
TYPES
1. Relay
2. Accessories
Contact arrangement Nominal voltage Without LED indication With LED indication
Part No. Part No.
4 poles
2 Form A/2 Form B
12 V DC SFS2-DC12V SFS2-L-DC12V
16 V DC SFS2-DC16V SFS2-L-DC16V
18 V DC SFS2-DC18V SFS2-L-DC18V
21 V DC SFS2-DC21V SFS2-L-DC21V
24 V DC SFS2-DC24V SFS2-L-DC24V
48 V DC SFS2-DC48V SFS2-L-DC48V
3 Form A/1 Form B
12 V DC SFS3-DC12V SFS3-L-DC12V
16 V DC SFS3-DC16V SFS3-L-DC16V
18 V DC SFS3-DC18V SFS3-L-DC18V
21 V DC SFS3-DC21V SFS3-L-DC21V
24 V DC SFS3-DC24V SFS3-L-DC24V
48 V DC SFS3-DC48V SFS3-L-DC48V
6 poles
4 Form A/2 Form B
12 V DC SFS4-DC12V SFS4-L-DC12V
16 V DC SFS4-DC16V SFS4-L-DC16V
18 V DC SFS4-DC18V SFS4-L-DC18V
21 V DC SFS4-DC21V SFS4-L-DC21V
24 V DC SFS4-DC24V SFS4-L-DC24V
48 V DC SFS4-DC48V SFS4-L-DC48V
5 Form A/1 Form B
12 V DC SFS5-DC12V SFS5-L-DC12V
16 V DC SFS5-DC16V SFS5-L-DC16V
18 V DC SFS5-DC18V SFS5-L-DC18V
21 V DC SFS5-DC21V SFS5-L-DC21V
24 V DC SFS5-DC24V SFS5-L-DC24V
48 V DC SFS5-DC48V SFS5-L-DC48V
3 Form A/3 Form B
12 V DC SFS6-DC12V SFS6-L-DC12V
16 V DC SFS6-DC16V SFS6-L-DC16V
18 V DC SFS6-DC18V SFS6-L-DC18V
21 V DC SFS6-DC21V SFS6-L-DC21V
24 V DC SFS6-DC24V SFS6-L-DC24V
48 V DC SFS6-DC48V SFS6-L-DC48V
Type No. of poles Part No.
PC board sockets 4 poles SFS4-PS
6 poles SFS6-PS
DIN terminal socket 4 poles SFS4-SFD
6 poles SFS6-SFD
SFS
4ds_61410_en_sfs: 170413D
COIL DATA (at 20C 68F)
Note: The nominal operating current of the LED indication type increases approximately 2 mA because of the light emitting diode display.
Contact arrangement Nominal
voltage, V DC
Pick-up
voltage, V DC
(max.)
(initial)
Drop-out
voltage, V DC
(min.)
(initial)
Nominal
operating
current, mA
(10%)
Coil resistance
(10%) Nominal
operating
power, mW Max. allowable
voltage, V DC
4 poles
2 Form A/2 Form B
12 9 1.2 30 400
Approx. 360
13.2
16 12 1.6 22.5 711 17.6
18 13.5 1.8 20 900 19.8
21 15.75 2.1 17.1 1,225 23.1
24 18 2.4 15 1,600 26.4
48 36 4.8 7.5 6,400 52.8
3 Form A/1 Form B
12 9 1.2 30 400 13.2
16 12 1.6 22.5 711 17.6
18 13.5 1.8 20 900 19.8
21 15.75 2.1 17.1 1,225 23.1
24 18 2.4 15 1,600 26.4
48 36 4.8 7.5 6,400 52.8
6 poles
4 Form A/2 Form B
12 9 1.2 41.7 288
Approx. 500
13.2
16 12 1.6 31.3 512 17.6
18 13.5 1.8 27.8 648 19.8
21 15.75 2.1 23.8 882 23.1
24 18 2.4 20.8 1,152 26.4
48 36 4.8 10.4 4,608 52.8
5 Form A/1 Form B
12 9 1.2 41.7 288 13.2
16 12 1.6 31.3 512 17.6
18 13.5 1.8 27.8 648 19.8
21 15.75 2.1 23.8 882 23.1
24 18 2.4 20.8 1,152 26.4
48 36 4.8 10.4 4,608 52.8
3 Form A/3 Form B
12 9 1.2 41.7 288 13.2
16 12 1.6 31.3 512 17.6
18 13.5 1.8 27.8 648 19.8
21 15.75 2.1 23.8 882 23.1
24 18 2.4 20.8 1,152 26.4
48 36 4.8 10.4 4,608 52.8
SFS
5
ds_61410_en_sfs: 170413D
DIMENSIONS mm inch Download from our Web site.
CAD Data
CAD Data
1. 4 poles (2 Form A/2 Form B, 3 FormA/1 Form B)
CAD Data
General tolerance: 0.3 .012
PC board pattern (Bottom view)
Tolerance: 0.1 .004
1.0
11.43 .450
0.5
10.16 .2005.08
5.08
13.97
1.83
3.5
Max. 13
Max. 24
Max. 40
.039
.020
.400
.200
.550
.072
.138
Max. .512
Max. .945
Max. 1.575
5.08
13.97
(1.83)
10-1.4 .055 dia.
10.16
11.43 .450.2005.08
.200
.550
.400
(.072)
Schematic (Bottom view)
Standard
(2 FormA/2 Form B) (3 FormA/1 Form B)
With LED indication
(2 FormA/2 Form B) (3 FormA/1 Form B)
37814
10256 9
37814
10256 9
37814
10256 9
37814
10256 9
2. 6 poles (4 Form A/2 Form B, 5 FormA/1 Form B, 3 Form A/3 Form B)
CAD Data
General tolerance: 0.3 .012
PC board pattern (Bottom view)
Tolerance: 0.1 .004
5.08.200
5.08
.200
.200
1.0
0.5
10.16 5.08
13.97
1.83
3.5
Max. 13
Max. 24
Max. 50
.450
5.08
11.43
.039
.020
.400 .200
.550
.072
.138
Max. .512
Max. .945
Max. 1.969
5.08
13.97
(1.83)
14-1.4 .055 dia.
10.16
5.08.200
5.08
.200
.200.450
5.08
11.43
.200
.550
.138
(.072)
Schematic (Bottom view)
Standard
(4 Form A/2 Form B) (5 FormA/1 Form B) (3 Form A/3 Form B)
With LED indication
(4 Form A/2 Form B) (5 FormA/1 Form B) (3 Form A/3 Form B)
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
SFS
6ds_61410_en_sfs: 170413D
3. PC board sockets (4 poles)
General tolerance: 0.3 .012
0.4
5.08
13.97
0.8 6.93
10.16
50.0
15.0
40.0
3.5
(13) (13)
11.43 .450.2005.08
.016
.200
.550
.031 .273
.400
1.969
.591
1.575
.138
(.512) (.512)
PC board pattern (Bottom view)
Tolerance: 0.1 .004
4.1
3-3.2 dia.
(For M3 screw)
.126
5.08
13.97
(6.93)
11.43 .450.2005.08
10.16
10-1.1 .043 dia.
24.8
39.9
.161
.200
.550
.400 .976
1.571
(.273)
Schematic (Bottom view)
Standard
(When 2 FormA/2 Form B mounted) (When 3 FormA/1 Form B mounted)
With LED indication
(When 2 FormA/2 Form B mounted) (When 3 FormA/1 Form B mounted)
37814
10256 9
37814
10256 9
37814
10256 9
37814
10256 9
mm inch
4. PC board sockets (6 poles)
General tolerance: 0.3 .012
0.4
5.08
13.97
0.8 6.93
10.16
60.0
15.0
40.0
3.5
(13) (13)
5.08.200
5.08
.200
.200.450
5.08
11.43
.016
.200
.550
.031 .273
.400
2.362
.591
1.575
.138
(.512) (.512)
PC board pattern (Bottom view)
Tolerance: 0.1 .004
5.08
13.97
(6.93)
3-3.2 dia.
(For M3 screw)
.126
4.1
5.08.200
5.08
.200
.200.450
5.08
11.43
14-1.1 .043 dia.
10.16 24.8
49.9
.200
.550
.161
.400 .976
1.965
(.273)
Schematic (Bottom view)
Standard
(When 4 Form A/2 Form B mounted) (When 5 FormA/1 Form B mounted) (When 3 Form A/3 Form B mounted)
With LED indication
(When 4 Form A/2 Form B mounted) (When 5 FormA/1 Form B mounted) (When 3 Form A/3 Form B mounted)
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
13 14
378121
2
4
56 910
11
SFS
7
ds_61410_en_sfs: 170413D
5. DIN terminal socket (4 poles)
General tolerance: 0.5 .020
* Reference value (when using DIN rail ATA48011)
Note: Round terminals cannot be used with DIN terminal sockets.
6.3+0.3
0
.248+.012
0
6.5
M3 screw.118
R2.0 .079
75.0
6.5
6.2±0.3 dia.
2-4×5 hole
22.4
4.0
35.4
58.9
*62.4
.256
2.953
.244±.012 dia.
.256
.882
.157
1.394
2.319
*2.457
Mounting hole dimensions
Tolerance: 0.1 .004
Schematic (Top view)
14.5±0.2
2-M3.5 or 4 dia. hole
80.0±0.2
.571±.008
2-M.138 or .157 dia. hole
3.150±.008
9
10 7 8
3
5
6
2
4
1
mm inch
6. DIN terminal socket (6 poles)
General tolerance: 0.5 .020
* Reference value (when using DIN rail ATA48011)
Note: Round terminals cannot be used with DIN terminal sockets.
6.3+0.3
0
.248+.012
0
M3 screw.118
6.5
6.5
75.0
2-4×5 hole
R2.0 .079
6.2±0.3 dia.
29.8
4.0
35.4
58.9
*62.4
.256
.256
2.953
.244±.012 dia.
1.173
.157
1.394
2.319
*2.457
Mounting hole dimensions
Tolerance: 0.1 .004
Schematic (Top view)
2-M3.5 or 4 dia. hole
22.0±0.2
80.0±0.2
2-M.138 or .157 dia. hole
.866±.008
3.150±.008
5213
7
46
9
13 11
810
1214
SFS
8ds_61410_en_sfs: 170413D
REFERENCE DATA
Other contact gaps when contacts are welded
SAFETY STANDARDS
* CSA standard: Certified by C-UL
Certification authority File No.
UL/C-UL E43149* 6A 277V AC, 6A 30V DC
TÜV B 05 04 13461 054 6A 250V AC (cos=1.0), 6A 250V DC (0ms), AC15: 2A 240V AC (cos=1.0), DC13: 1A 24V DC (L/R 48ms)
1. Operate/response/release time
Sample: SFS4-DC24V (4 Form A/2 Form B)
Quantity: n = 20 (a contacts: 80, b contacts: 40)
2. Coil temperature rise
Sample: SFS4-DC24V (4 Form A/2 Form B)
Quantity: n = 3
Measured portion: Inside the coil
Ambient temperature: Room temperature
(27C 80.6F), 70C 158F, 85C 185F
3. Malfunctional shock
Sample: SFS4-DC24V (4 Form A/2 Form B)
Quantity: n = 3
No. of contacts
10 23456 789
10 11 12 13 14 15
0
30
20
10
40
50
Time, ms
Release time
Operate time
Response time
Coil applied voltage, %V
Temperature rise, °C
90 100 120110 130
50
40
30
20
10
0
0A Room temperature
6A Room temperature
0A 70°C
6A 70°C
0A 85°C
4.5A 85°CY'
Y
XZ
Z' X'
Y
Y'
Z'
ZXX'
Deenergized condition
Energized condition
200m/s2
200m/s2
200m/s2
200m/s2
200m/s2
200m/s2
4. Max, switching capacity
(2 Form A/2 Form B type)
10 20 30 50 70 100 200 300 500 1000
125 250
10
1
2
3
4
5
6
7
8
0.1
0.2
0.3
0.5
0.7
Contact current, A
Contact voltage, V
AC resistive load
DC resistive load
Sample: SFS4-DC24V (4 Form A/2 Form B)
The table below shows the state of the other contacts.
In case of form “NO” contact weld the coil applied voltage is 0 V.
In case of form “NC” contact weld the coil applied voltage is nominal.
>0.5: contact gap is kept at min. 0.5 mm .020inch
Empty cells: either ON or OFF
Note: Contact gaps are shown at the initial state.
If the contact transfer is caused by load switching, it is necessary to check the actual loading.
State of other contacts
3-4 (NC) 5-6 (NC) 7-8 (NO) 9-10 (NO) 11-12 (NO) 13-14 (NO)
Welded contact No.
3-4 (NC) >0.5 >0.5 >0.5 >0.5
5-6 (NC) >0.5 >0.5 >0.5 >0.5
7-8 (NO) >0.5 >0.5
9-10 (NO) >0.5 >0.5
11-12 (NO) >0.5 >0.5
13-14 (NO) >0.5 >0.5
SFS
9
ds_61410_en_sfs: 170413D
NOTES
For Cautions for Use, see Relay Technical Information.
1. Coil operating power
Pure DC current should be applied to
the coil. The wave form should be
rectangular. If it includes ripple, the
ripple factor should be less than 5%.
However, check it with the actual
circuit since the characteristics may
be slightly different.
2. Coil connection
When connecting coils, refer to the
wiring diagram to prevent mis-
operation or malfunction.
3. Cleaning
This relay is not sealed, therefore,
immersion may cause failure. Be
careful that flux does not overflow
onto the PC board or penetrate inside
the relay.
4. Soldering
When using automatic soldering, the
following conditions are recommended
1) Preheating: 120C 248F, within
120 s max (PC board solder surface).
2) Soldering: 260C5C 500F41F,
within 6 s max.
5. Attach directly to the chassis or use
a DIN rail.
(1) When attaching directly to chassis
•
Use a M3.5 screw, spring washer, and
hex nut.
• For the mounting pitch, refer to the
dimensions.
(2) When installing on a DIN rail
• Use a 35 mm 1.378 inch wide DIN rail
(DIN46277).
• Install and remove as shown in the figures
below.
2) Refer to the figure below for
applicable wire-pressed terminals.
(You cannot use round type wire-
pressed terminals.)
6. Other
1) If the relay has been dropped, the
appearance and characteristics
should always be checked before use.
2) The switching lifetime is defined
under the standard test condition
specified in the JIS* C 5442-1996
standard (temperature 15 to 35C 59 to
95F, humidity 25 to 75%). Check this
with the actual product as it is affected
by the coil driving circuit, load type,
activation frequency, activation phase,
ambient conditions and other factors.
Also, be especially careful with loads
such as those listed below.
(1) When used for AC load-operation
and the operating phase is
synchronous. Rocking and fusing can
easily occur due to contact shifting.
(2) During high frequency on/off
operation with certain loads, arcing
may occur at the contacts. This can
cause fusion to Oxygen and Nitrogen
gas in the air creating Nitric Acid
(HNO3) which can cause corrosion to
the contacts.
Please see the following
countermeasure examples:
1.Incorporate an arc-extinguishing
circuit.
2.Lower the operating frequency
3.Lower the ambient humidity
3) For secure operations, nominal coil
voltage should be applied. In addition,
please note that pick-up and drop-out
voltage will vary according to the
ambient temperature and operating
conditions.
4) Heat, smoke, and/or fire may occur
if the relay is used outside the
allowable ranges for the coil ratings,
contact ratings, operating cycle
lifetime, and other specifications.
Therefore, do not use the relay if these
ratings are exceeded. Also, make sure
that the relay is wired correctly.
5) Incorrect wiring may cause false
operation or generate heat or flames.
6) Check the ambient conditions when
storing or transporting the relays and
devices containing the relays.
Freezing or condensation may occur
in the relay causing damage. Avoid
exposing the relays to heavy loads, or
strong shock and vibration.
7. Usage, transport and storage
conditions
1) Ambient temperature, humidity, and
atmospheric pressure during usage,
transport, and storage of the relay:
(1) Temperature:
–40 to +85C –40 to +185F
(When the temperature is 70 to 80C,
reduce the 6 A max. switching current
by 0.1 A/C.)
(2) Humidity: 5 to 85% RH
(Avoid freezing and condensation.)
The humidity range varies with the
temperature. Use within the range
indicated in the graph below.
(3) Atmospheric pressure: 86 to 106
kPa
Temperature and humidity range for
usage, transport, and storage
2) Condensation
Condensation forms when there is a
sudden change in temperature under
high temperature and high humidity
conditions. Condensation will cause
deterioration of the relay insulation.
3) Freezing
Condensation or other moisture may
freeze on the relay when the
temperatures is lower than 0C 32F.
This causes problems such as
sticking of movable parts or
operational time lags.
4) At low temperature, low humidity
environments, the plastic becomes
brittle.
Please note corrections.
8. Please connect DC coil types with
LED and built-in diode correctly by
verifying the coil polarity (“+” and “–
”). Connecting with reverse polarity
will cause the LED not to light and
damage the built-in diode due to its
specification.
<When installing>
<When removing>
Pull
Screwdriver
DIN rail
Push
6.3 mm max. 3 mm min.
.248 inch max. .118 inch min.
Humidity, %R.H.
Temperature, °C°F
Tolerance range
85
5
0+85-40
(Avoid
condensation
when used at
temperatures
higher than 0°C32°F)
(Avoid freezing when
used at temperatures
lower than 0°C32°F)
+32 +185-40
