SF4D-DC24V Panasonic Electric Works, SF4D-DC24V Datasheet - Page 6

• 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

2) 4 Form A 4 Form B type
When internal contacts (No. 2, No. 3, No. 6 or No. 7) are welded, the armature becomes non-operational and the four form “a” contact
gaps are maintained at 0.5 mm
When external contacts (No. 1, No. 4, No. 5 or No. 8) are welded, gaps of 0.5 mm
adjacent contacts and other contacts operate normally by the coil being non-energized.
Example 2:
If external connections are made in series.
Even if one of the contacts welds, the other contacts
operate independently and the contact gaps are
maintained at greater than 0.5 mm
For Cautions for Use.
No.8
No.7
No.6
No.5
No.8
No.6
No.8
No.7
No.6
No.5
No.7
No.5
Terminal No. 20–19 12–11 8–7 16–15
Contact No.
Contact Operation Table
External Contacts Weld
Internal Contacts Weld
No.1 No.2 No.3 No.4
Non-energized
Energized
13–14 5–6 9–10 17–18
No.5 No.6 No.7 No.8
.020
inch.
.020inch
All Rights Reserved © COPYRIGHT Panasonic Electric Works Co., Ltd.
No.1
No.2
No.3
No.4
No.1
No.3
No.1
No.2
No.3
No.4
No.2
No.4
or greater. Reliable cut-off is thus ensured.
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
form “b” contact.
* Contact gaps are shown at the initial state.
Non-energized
Contact No.
If the contacts change state owing to loading/breaking it is necessary to check
the actual loading.
No.8
No.6
No.8
No.6
terminal
No.7
No.5
No.7
No.5
Welded
Non-energized (when no. 1 contact is welded)
No.
Energized (when no. 2 contact is welded)
Energized
Contact No.
1
2
3
4
5
6
7
8
>0.5
>0.5
>0.5
>0.5
1
Weld
>0.5
>0.5
>0.5
>0.5
>0.5
2
>0.5
>0.5
>0.5
>0.5
>0.5
3
State of other contacts
>0.5
>0.5
>0.5
4
No.1
No.3
No.1
No.2
No.3
No.4
No.2
No.4
.020inch
Contact gap
min 0.5 mm
>0.5
>0.5
>0.5
5
Example: If the No. 2 contact welds.
Each of the four form “a” contacts (No. 1, 3, 5, and 7)
maintains a gap of greater than 0.5 mm
Example 1: If the No. 1 contact welds.
The adjacent No. 2 contact maintains a gap of greater
than 0.5 mm
the coil is not energized, return to their normal return
state; each of form “a” contacts (No. 3, 5, and 7)
maintains a contact gap of greater than 0.5 mm
.020
8) return to a closed state.
and greater are maintained between
SF Double contact type
>0.5
>0.5
>0.5
>0.5
>0.5
6
.020 inch
inch; each of the form “b” contacts (No. 4, 6, and
>0.5
>0.5
>0.5
>0.5
>0.5
7
.020
>0.5
>0.5
>0.5
inch. The other contacts, because
8
>0.5: contact gap is kept at
min. 0.5 mm
Empty cells:
either closed or open
: contact closed
.020 inch
.020
inch.