Flat type safety relays
SF RELAYS
FEATURES
1. Forced operation contacts 5. High sensitivity
N.O. and N.C. side contacts are Realizes thin shape and high sensitivity
connected through a card so that one (500mW nominal operating power) by
interacts with the other in movement. In utilizing high-efciency polarized
case of a contact welding, the other magnetic circuit with 4-gap balanced
keeps a min. 0.5mm .020inch contact armature.
gap. 6. Complies with safety standards
2. Separated chamber structure Standard products are UL, CSA, TV
N.O. and N.C. side contacts are put in and SEV certied. Conform to European
each own space surrounded with a card standards. TV certied. Complies with
and a body-separater. That prevents SUVA European standard.
short circuit between contacts, which is
caused by their springs welding or
TYPICAL APPLICATIONS
damaged.
3. Contact arrangement of 3 Form A 1. Industrial equipment such as
1 Form B presses and machine tools
Enables various forms of control circuit. 2. Elevators and other kinds of
4. High breakdown voltage hoisting mechanisms, conveyor
High breakdown voltage 2,500 Vrms equipment.
(between contact sets/ between contact
RoHS compliant
and coil)
ORDERING INFORMATION
SF 3
Contact arrangement
3: 3 Form A 1 Form B
Nominal coil voltage
DC 5, 12, 24, 48, 60V
TYPES
Contact arrangement Nominal coil voltage Part No.
5V DC SF3-DC5V
12V DC SF3-DC12V
3 Form A 1 Form B 24V DC SF3-DC24V
48V DC SF3-DC48V
60V DC SF3-DC60V
Standard packing: Carton: 20 pcs.; Case: 200 pcs.
RATING
1. Coil data
Nominal coil current Coil resistance Nominal operating Max. applied
Contact Nominal coil Pick-up voltage Drop-out voltage
[10%] [10%] power voltage
arrangement voltage (at 20C 68F) (at 20C 68F)
(at 20C 68F) (at 20C 68F) (at 20C 68F) (at 20C 68F)
5V DC 100mA 50
12V DC 41.7mA 288
80%V or less of 10%V or more of
120%V of
3 Form A 1 Form B 24V DC nominal voltage nominal voltage 20.8mA 1,152 500mW
nominal voltage
(Initial) (Initial)
48V DC 10.4mA 4,608
60V DC 8.3mA 7,200
ASCTB118E 201408-T
1SF
2. Specications
Characteristics Item Specications
Arrangement 3 Form A 1 Form B
Contact Contact resistance (Initial) Max. 30 m (By voltage drop 6 V DC 1A)
Contact material Au-ashed AgSnO2 type
Nominal switching capacity (resistive load) 6A 250V AC, 6A 30V DC
Max. switching power (resistive load) 1,500VA 180W
Max. switching voltage 250V AC, 30V DC
Rating
Max. switching current 6A
Nominal operating power 500mW
1
Min. switching capacity (Reference value)* 100mA 5V DC
Insulation resistance (Initial) Min. 1,000M (at 500V DC) Measurement at same location as Breakdown voltage section.
Between open contacts 2,500 Vrms for 1min. (Detection current: 10mA)
Breakdown voltage
Between contact sets 2,500 Vrms for 1min. (Detection current: 10mA)
(Initial)
Between contact and coil 2,500 Vrms for 1min. (Detection current: 10mA)
Electrical
Max. 45C 113F
characteristics
Temperature rise (coil)
(By resistive method, nominal voltage applied to the coil; contact carrying current: 6A)
Surge breakdown voltage (between contact and coil)
Operate time Max. 30ms (Nominal voltage applied to the coil, excluding contact bounce time.)
Max. 15ms (Nominal voltage applied to the coil, excluding contact bounce time.)
Release time
(without diode)
2
Functional Min. 294 m/s (Half-wave pulse of sine wave: 11 ms; detection time: 10s)
Shock resistance
2
Destructive Min. 980 m/s (Half-wave pulse of sine wave: 6 ms)
Mechanical
characteristics
Functional 10 to 55 Hz at double amplitude of 2 mm (Detection time: 10s)
Vibration resistance
Destructive 10 to 55 Hz at double amplitude of 2 mm
7
Mechanical Min. 10 : (at 180 times/min.)
Expected life
4 2
Electrical Min. 310 (at 20 times/min.)*
Ambient temperature: 40C to +70C 40F to +158F
3
Conditions for operation, transport and storage*
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Conditions
Max. Operating speed 180 times/min.
Unit weight 38g 1.34oz
Notes: *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.
5
*2. More than 10 operations when applying the nominal switching capacity to one side of contact pairs of each Form A contact and Form B contact
*3. The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to Usage, transport and storage
conditions in NOTES.
DIMENSIONS (mm inch) The CAD data of the products with a CAD Data mark can be downloaded from: