SF4D-DC24V Panasonic Electric Works, SF4D-DC24V Datasheet - Page 4

• Manufacturer Part Number: SF4D-DC24V
• Description: RELAY SAFETY 6A 24VDC PCMNT 8PST
• Manufacturer: Panasonic Electric Works
• Series: SFr
• Type: Safety Relayr

Specifications of SF4D-DC24V

• Relay Type: Safety
• Contact Form: 8PST (4 Form A, 4 Form B)
• Contact Rating (current): 6A
• Switching Voltage: 250VAC
• Coil Type: Standard
• Coil Current: 20.8mA
• Coil Voltage: 24VDC
• Turn On Voltage (max): 14.4 VDC
• Turn Off Voltage (min): 3.6 VDC
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Circuit: 8PST (4 Form A, 4 Form B)
• Contact Rating @ Voltage: 6A @ 250VAC
• Control On Voltage (max): 14.4 VDC
• Control Off Voltage (min): 3.6 VDC
• Brand/series: SF Series
• Current, Rating: 6 A
• Function: Safety
• Material, Contact: Gold-Flashed Silver Alloy
• Number Of Pins: 18
• Resistance, Coil: 1.152 Ohms
• Standards: cULus, TUV, CSA
• Temperature, Operating: -40 to +70 °C
• Termination: Solder
• Voltage, Breakdown: 2500 V (RMS) (Between Contacts and Coil)
• Voltage, Control: 24 VDC
• Voltage, Rating: 380 VAC
• Weight: 1.66 Oz. (Approx.)
• Relay Construction: Non-Latching
• Contact Arrangement: 4PST-NO/4PST-NC
• Coil Voltage Dc: 24V
• Voltage Rating (vdc): 30V
• Voltage Rating (vac): 440V
• Dropout Volt (min): 3.6VDCV
• Coil Resistance: 1.152kohm
• Pick-up Voltage (max): 18VDC
• Maximum Power Rating: 180W/1.5KVA
• Operate Time: 30ms
• Contact Current Rating: 6A
• Contact Material: Silver Tin Oxide/Gold Flash
• Coil Suppression Diode: No
• Push To Test Button: No
• Led Indicator: No
• Seal: Unsealed
• Product Height (mm): 16.5mm
• Product Depth (mm): 33mm
• Product Length (mm): 53.3mm
• Operating Temp Range: -40C to 70C
• Pin Count: 18
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 255-1441

SAFETY STANDARDS
* CSA standard: Certified by C-UL
SAFETY STRUCTURE OF SF RELAYS
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
E120782*
1. Forced operation method
2. Independent operation method
3. Separate chamber method
4. 2 Form A 2 Form B contact
(2 Form A 2 Form B,
4 Form A 4 Form B types)
(4 Form A 4 Form B type)
(2 Form A 2 Form B,
4 Form A 4 Form B types)
4 Form A 4 Form B contact
File No.
UL/C-UL (Recognized)
6A 250V AC
6A 24V DC
Contact rating
The two contacts “a” and “b” are coupled with the same card. The operation
of each contact is regulated by the movement of the other contact.
None of four contacts are held in position by the armature. Even though one
of the external N.O. contacts has welded, the other three contacts have
returned owing to the de-energizing of the coil.
In independent chambers, the contacts “a” and “b” are kept apart by a body/
case separator or by the card itself.
Structure with independent COM contact of 2 Form A 2 Form B and
4 Form A 4 Form B contacts.
All Rights Reserved © COPYRIGHT Panasonic Electric Works Co., Ltd.
Return
Return
Card
Case separator
968 EZ 116.00 01 (SF2D)
968 EZ 113.00 01 (SF4D)
(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 worst-case
File No.
1
Structure
Weld
TÜV (Certified)
Card
Min. 0.5 mm
8A 24V DC
6A 230V AC
Contact a
Contact b
2
External NO
contact weld
Return
Contact a
Body
separator
Contact b
.020 inch
Rating
01, 1851
Even when one contact is welded closed, the other
maintains a gap of greater than 0.5 mm
In the diagram on the left, the lower contact “b” have
welded but the upper contact “a” maintain at a gap of
greater than 0.5 mm
Subsequent contact movement is suspended and the
weld can be detected
Enables design of safety circuits that allow weld
detection and return at an early stage.
As shown at the top right of the diagram on the left, if
the external N.O. contact welds, a 0.5 mm
gap is maintained.
Each of the other contacts returns to N.O. because
the coil is no longer energized.
Prevents shorting and fusing of springs and spring
failure owing to short-circuit current.
As shown on the diagram on the left, even if the
operating springs numbered 1 and 2 there is no
shorting between “a” and “b” contacts.
Independent COM enables differing pole circuit
configurations. This makes it possible to design
various kinds of control circuits and safety circuits.
SF Double contact type
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.
File No.
.020
Operation
SEV
inch.
6A 230V AC
6A 24V DC
Contact rating
.020
.020 inch
inch.