Safety Relays
SF RELAYS
Product Catalog
2022.4
Safety Relays
SF RELAYS
Flat type Safety relay compliant with Safety standards
FEATURES
[ Protective construction ] Sealed type
● Forced operation method
● Separate chamber method
53.3
● Contact arrangement of 3 Form A 1 Form B
25
TYPICAL APPLICATIONS
16.5
● Industrial equipment
● Elevator etc.
( Unit: mm )
ORDERING INFORMATION ( PART NO. : Ordering part number for Japanese market)
AG 1 0 3
Operationg function
0: Single side stable
Contact arrangement
3: 3 Form A 1 Form B
Rated coil voltage (DC)
1: 12 V, 2: 24 V, 3: 48 V, 8: 60 V, 9: 5 V
ORDERING INFORMATION ( TYPE NO. : Ordering part number for non Japanese market)
SF 3
Rated coil voltage
DC 5, 12, 24, 48, 60 V
Contact arrangement
3: 3 Form A 1 Form B
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Panasonic Industry Co., Ltd. 2022
ASCTB118E 202204
Safety Relays SF RELAYS
TYPES
" Type No. " is ordering part number for non Japanese market. " Part No. " is ordering part number for Japanese market.
■ PC board terminal
● Carton packing
Contact arrangement
Rated coil voltage
5 V DC
3 Form A
1 Form B
4 poles
Type No.
Part No.
SF3DC5V
AG1039
12 V DC
SF3DC12V
AG1031
24 V DC
SF3DC24V
AG1032
48 V DC
SF3DC48V
AG1033
60 V DC
SF3DC60V
AG1038
Standard packing
Inner carton
Outer
carton
20 pcs.
200 pcs.
RATING
■ Coil data
• O
perating characteristics such as "Operate voltage" and "Release voltage" are influenced by mounting conditions or
ambient temperature, etc.
Therefore, please use the relay within ±5% of rated coil voltage.
• "Initial" means the condition of products at the time of delivery.
Contact
arrangement
5 V DC
4 poles
Operate
voltage*
( at 20℃ )
Release
voltage*
( at 20℃ )
Rated operating
current
( ±10%, at 20℃ )
Max. 80% V
of rated coil
voltage
( Initial )
Min. 10% V
of rated coil
voltage
( Initial )
100 mA
50 Ω
41.7 mA
288 Ω
20.8 mA
1,152 Ω
10.4 mA
4,608 Ω
8.3 mA
7,200 Ω
Rated coil
voltage
3 Form A
1 Form B
12 V DC
24 V DC
48 V DC
60 V DC
Coil resistance
( ±10%, at 20℃ )
Rated operating
power
Max. allowable
voltage
( at 60℃ )
500 mA
120% V of
rated coil
voltage
* square, pulse drive ( JIS C 5442 )
■ Specifications
Item
Contact data
Specifications
Contact arrangement
3 Form A 1 Form B
Contact resistance
( initial )
Max. 30 mΩ ( by voltage drop 6 V DC 1 A )
Contact material
Auflashed AgSnO2 type
Contact rating ( resistive )
6 A 250 V AC, 6 A 30 V DC
Max. switching power
( resistive )
1,500 VA, 180 W
Max. switching voltage
250 V AC, 30 V DC
Max. switching current
6A
Min. switching load
( reference value )*1
100 mA 5 V DC
Insulation resistance ( initial )
Min. 1,000 MΩ ( at 500 V DC, Measured portion is the same as the case of dielectric strength. )
Dielectric
strength
( initial )
Between open contacts
2,500 Vrms for 1 min ( detection current: 10 mA )
Between contact sets
2,500 Vrms for 1 min ( detection current: 10 mA )
Between contact and coil
2,500 Vrms for 1 min ( detection current: 10 mA )
Time
characteristics
( initial )
Operate time
Max. 30 ms at rated coil voltage ( at 20℃, without bounce )
Release time
Max. 15 ms at rated coil voltage ( at 20℃, without bounce, without diode )
Shock
resistance
Functional
294 m/s2 ( halfsine shock pulse: 11 ms, detection time: 10 µs )
Destructive
980 m/s2 ( halfsine shock pulse: 6 ms )
Vibration
resistance
Functional
10 to 55 Hz ( at double amplitude of 2 mm, detection time: 10 µs )
Destructive
10 to 55 Hz ( at double amplitude of 2 mm )
Expected life
Mechanical life
Min. 10 x 106 ( switching frequency 180 times/min )
Conditions
Conditions for usage,
transport and storage*2
Ambient temperature: 40 to +70℃, Humidity: 5 to 85% RH ( Avoid icing and condensation )
Unit weight
Approx. 38 g
*1: T
his value is a rough indication of the lower limit at which switching is possible at micro load level.
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.
*2: For ambient temperature, please refer to the "GUIDELINES FOR RELAY USAGE".
■ Electrical life
Conditions: Resistive load, switching frequency 20 times/min
Type
Switching capacity
Number of operations
3 Form A 1 Form B
6 A 250 V AC
Min. 30 x 103*
* When applying the rated switching capacity to one side of contact pairs of each Form A contact and Form B contact: Min. 100 x 103 times
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Panasonic Industry Co., Ltd. 2022
ASCTB118E 202204
Safety Relays SF RELAYS
DIMENSIONS
Unit: mm
CAD The CAD data of the products with a "CAD" mark can be downloaded from our Website.
External dimensions
Recommended PC board pattern
( BOTTOM VIEW )
2.54
1.0
12.7
12.7
12.7
1.0
101.4 dia. holes
2.54
0.5
5.08
3.5±0.5
16±0.5
CAD
6
7
8
Tolerance: ±0.1
12.7
1
7.62
25.0
0.3
5
0.48
53.3±0.5
2
9
10
11
Schematic
( BOTTOM VIEW )
12
General tolerance: ±0.3
1
2
SAFETY STANDARDS
6
7
8
9
10
11
12
Each standard may be updated at any time, so please check our Website for the latest information.
■ UL/C-UL ( Recognized )
File No.
E120782
5
■ TÜV ( Certified )
Contact rating
File No.
6 A 250 V AC
Contact rating
968/EZ 312.01/09
6 A 250 V AC
■ CSA ( Certified )
CSA standard certified by CUL
SAFETY STRUCTURE
This SF relay design ensures that subsequent operations shut
down and can automatically return to a safe state when the
SF relay suffers overloading and other circuit abnormalities
( unforeseen externally caused circuit or device breakdowns,
end of life incidents, and noise, surge, and environmental
influences ) owing to contact welding, spring fusion or, in
the worstcase scenario, relay breakdown ( coil rupture,
faulty operation, faulty return, and fatigue and breakage
of the operating spring and return spring ), and even in the
event of end of life.
Structure
Operation
Min. 0.5 mm
1
Forced operation method
( 3 Form A 1 Form B )
N.O.
(contact A)
Card
N.C.
(contact B)
Weld
The two form A and B contacts are coupled with
the same card. The operation of each contact is
regulated by the movement of the other contact.
1
Card
N.O.
(contact A)
2
3
～
～
～
～
Case separator
Separate chamber method
( 3 Form A 1 Form B )
3 Form A 1 Form B contact
Even when one contact is welded closed, the other
maintains a gap of Min. 0.5 mm.
2
Body
separator
( Example ) In the diagram on the left, the form
B contact have welded but the form
A contact maintain at a gap of 0.5
mm. Subsequent contact movement
is suspended and the weld can be
detected.
Prevents shorting between contacts and welding
of springs and spring failure owing to short circuit
current.
N.C.
(contact B)
In independent chambers, the form A and B
contacts are kept apart by a body/separator of
card and by the card itself.
( Example ) A
s shown on the diagram on the left,
even if the operating springs numbered
1 and 2 there is no shorting between
contacts.
Contact arrangement with independent COM
contact ( 3 Form A 1 Form B )
Independent COM enables differing pole circuit
configurations.
This makes it possible to design
various kinds of control circuits and safety circuits.
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Panasonic Industry Co., Ltd. 2022
ASCTB118E 202204
Safety Relays SF RELAYS
OPERATION ( WHEN CONTACTS ARE WELDED )
■ Form B contact welding
If the form B contact ( No. 3 ) welds, the armature becomes nonoperational, the contact gaps at the three form A contacts
are maintained at Min. 0.5 mm. Reliable cutoff state is thus ensured.
No. 4
No. 1
No. 4
No. 1
No. 3
No. 2
No. 3
No. 2
Nonenergized
( Example ) C
ase of No. 3 contact
welding Each of the three
form A contacts ( No. 1,
No. 2 and No. 4 ) maintain
a gap of Min. 0.5 mm.
Energized (when No. 3 contact is welded)
Because the welded contact spring is
attached to the card, the armature has
become inoperative.
■ Form A contact welding
When the form A contacts ( No. 1, No. 2 or No. 4 ) weld, the armature remains in a nonreturned state and the contact gap
at the single form B contact is maintained at Min. 0.5 mm. Reliable cutoff state is thus ensured.
No. 4
No. 1
No. 4
No. 1
No. 3
No. 2
No. 3
No. 2
Energized
( Example ) C
ase of No. 2 contact
welding The single form B
contact ( No. 3 ) maintains
a gap of Min. 0.5 mm.
Nonenergized
(when No. 2 contact is welded)
■ Contact operation table
The table below shows the state of the other contacts when the current through the welded form A contact is 0 V and the
rated voltage is applied through the welded form B contact.
State of other contacts
1
No. 4
1
No. 1
Contact No.
Terminal No.
3
No. 2
No. 1 No. 2
1112 78
No. 3
56
No. 4
910
3
4
> 0.5
2
Welded
terminal No.
No. 3
2
−
−
> 0.5
4
> 0.5
> 0.5
−
> 0.5
> 0.5
−
> 0.5: Contact gap Min. 0.5 mm
Empty cells: either closed or open
Note) Contact gaps are shown at the initial state. If the contacts change state owing to load switching it is
necessary to check the actual loading.
GUIDELINES FOR USAGE
■ For cautions for use, please read "GUIDELINES FOR RELAY USAGE".
https://industrial.panasonic.com/ac/e/control/relay/cautions_use/index.jsp
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Panasonic Industry Co., Ltd. 2022
ASCTB118E 202204
GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE
For cautions for use, please read “GUIDELINES FOR RELAY USAGE”.
https://industrial.panasonic.com/ac/e/control/relay/cautions_use/index.jsp
Precautions for Coil Input
Long term current carrying
A circuit that will be carrying a current continuously for long periods
without relay switching operation. (circuits for emergency lamps,
alarm devices and error inspection that, for example, revert only
during malfunction and output warnings with form B contacts)
Continuous, long-term current to the coil will facilitate deterioration
of coil insulation and characteristics due to heating of the coil itself.
For circuits such as these, please use a magnetic-hold type latching
relay. If you need to use a single stable relay, use a sealed type
relay that is not easily affected by ambient conditions and make a
failsafe circuit design that considers the possibility of contact failure
or disconnection.
DC Coil operating power
Steady state 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, please check with the actual circuit since the electrical
characteristics may vary. The rated coil voltage should be applied to
the coil and the set/reset pulse time of latching type relay differs for
each relays, please refer to the relay's individual specifications.
Maximum allowable voltage and temperature rise
Proper usage requires that the rated coil voltage be impressed on
the coil. Note, however, that if a voltage greater than or equal to the
maximum continuous voltage is impressed on the coil, the coil may
burn or its layers short due to the temperature rise. Furthermore, do
not exceed the usable ambient temperature range listed in the
catalog.
Operate voltage change due to coil temperature rise
In DC relays, after continuous passage of current in the coil, if the
current is turned OFF, then immediately turned ON again, due to the
temperature rise in the coil, the operate voltage will become
somewhat higher. Also, it will be the same as using it in a higher
temperature atmosphere. The resistance/temperature relationship
for copper wire is about 0.4% for 1°C, and with this ratio the coil
resistance increases. That is, in order to operate of the relay, it is
necessary that the voltage be higher than the operate voltage and
the operate voltage rises in accordance with the increase in the
resistance value. However, for some polarized relays, this rate of
change is considerably smaller.
Coil connection
When connecting coils of polarized relays, please check coil polarity
(+,-) at the internal connection diagram (Schematic). If any wrong
connection is made, it may cause unexpected malfunction, like
abnormal heat, fire and so on, and circuit do not work. Avoid
impressing voltages to the set coil and reset coil at the same time.
Ambient Environment
Usage, Transport, and Storage Conditions
Dew condensation
Condensation occurs when the ambient temperature drops suddenly
from a high temperature and humidity, or the relay is suddenly
transferred from a low ambient temperature to a high temperature
and humidity. Condensation causes the failures like insulation
deterioration, wire disconnection and rust etc.
Panasonic Industry Co., Ltd. does not guarantee the failures caused
by condensation.
The heat conduction by the equipment may accelerate the cooling
of device itself, and the condensation may occur.
Please conduct product evaluations in the worst condition of the
actual usage. (Special attention should be paid when high
temperature heating parts are close to the device. Also please
consider the condensation may occur inside of the device.)
Icing
Condensation or other moisture may freeze on relays when the
temperature become lower than 0°C.This icing causes the sticking
of movable portion, the operation delay and the contact conduction
failure etc. Panasonic Industry Co., Ltd. does not guarantee the
failures caused by the icing.
The heat conduction by the equipment may accelerate the cooling
of relay itself and the icing may occur. Please conduct product
evaluations in the worst condition of the actual usage.
Low temperature and low humidity
The plastic becomes brittle if the switch is exposed to a low
temperature, low humidity environment for long periods of time.
High temperature and high humidity
Storage for extended periods of time (including transportation
periods) at high temperature or high humidity levels or in
atmospheres with organic gases or sulfide gases may cause a
sulfide film or oxide film to form on the surfaces of the contacts and/
or it may interfere with the functions. Check out the atmosphere in
which the units are to be stored and transported.
During usage, storage, or transportation, avoid locations subjected
to direct sunlight and maintain normal temperature, humidity and
pressure conditions.
Temperature/Humidity/Pressure
When transporting or storing relays while they are tube packaged,
there are cases the temperature may differ from the allowable
range. In this case be sure to check the individual specifications.
Also allowable humidity level is influenced by temperature, please
check charts shown below and use relays within mentioned
conditions. (Allowable temperature values differ for each relays,
please refer to the relay's individual specifications.)
1) Temperature:
The tolerance temperature range differs for each relays, please
refer to the relay’s individual specifications
2) Humidity: 5 to 85 % RH
3) Pressure: 86 to 106 kPa
Humidity (％ RH)
85
Allowable range
Avoid icing
when used at
temperatures
lower than 0°C
Avoid con
densation when
used at tem
peratures higher
than 0°C
5
40
0
Ambient temperature (℃)
85
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Panasonic Industry Co., Ltd. 2022
ASCTB412E 202204
GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE
Package
In terms of the packing format used, make every effort to keep the
effects of moisture, organic gases and sulfide gases to the absolute
minimum.
Silicon
When a source of silicone substances (silicone rubber, silicone oil,
silicone coating materials and silicone filling materials etc.) is used
around the relay, the silicone gas (low molecular siloxane etc.) may
be produced.
This silicone gas may penetrate into the inside of the relay. When
the relay is kept and used in this condition, silicone compound may
adhere to the relay contacts which may cause the contact failure.
Do not use any sources of silicone gas around the relay (Including
plastic seal types).
NOx Generation
When relay is used in an atmosphere high in humidity to switch a
load which easily produces an arc, the NOx created by the arc and
the water absorbed from outside the relay combine to produce nitric
acid.
This corrodes the internal metal parts and adversely affects
operation.
Avoid use at an ambient humidity of 85%RH or higher (at 20°C). If
use at high humidity is unavoidable, please contact our sales
representative.
Others
Cleaning
• Although the environmentally sealed type relay (plastic sealed type,
etc.) can be cleaned, avoid immersing the relay into cold liquid (such
as cleaning solvent) immediately after soldering. Doing so may
deteriorate the sealing performance.
• Cleaning with the boiling method is recommended(The temperature
of cleaning liquid should be 40°C or lower ).
Avoid ultrasonic cleaning on relays. Use of ultrasonic cleaning may
cause breaks in the coil or slight sticking of the contacts due to
ultrasonic energy.
Please refer to "the latest product specifications"
when designing your product.
•Requests to customers:
https://industrial.panasonic.com/ac/e/salespolicies/
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Panasonic Industry Co., Ltd. 2022
ASCTB412E 202204
Electromechanical Control Business Division
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©Panasonic Industry Co., Ltd. 2022
Specifications are subject to change without notice.
ASCTB118E 202204
2022.4
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