SF4-DC5V Panasonic Electric Works, SF4-DC5V Datasheet - Page 5

• Manufacturer Part Number: SF4-DC5V
• Description: RELAY SAFETY PC MNT 8PST 6A 5VDC
• Manufacturer: Panasonic Electric Works
• Series: SFr

Specifications of SF4-DC5V

• Relay Type: Safety
• Contact Form: 8PST (4 Form A, 4 Form B)
• Contact Rating (current): 6A
• Switching Voltage: 250VAC
• Coil Type: Standard
• Coil Current: 100mA
• Coil Voltage: 5VDC
• Turn On Voltage (max): 3.75 VDC
• Turn Off Voltage (min): 0.75 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): 3.75 VDC
• Control Off Voltage (min): 0.75 VDC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 255-1414

THE OPERATION OF SF RELAYS (when contacts are welded)
SF relays work to maintain a normal operating state even when overloading or short-circuit currents occur. It is also easy to include
weld detection circuits and safety circuits in the design to ensure safety even if contacts weld.
SF
1) 2a2b Type
If the form “b” contacts (Nos. 1 and 3) weld, the armature becomes non-operational and the contact gap of the two form “a” contacts
is maintained at greater than 0.5 mm
If the two form “a” contacts (Nos. 2 and 4) weld, the armature becomes non-operational and the gap between the two form "b"
contacts is maintained at greater than 0.5 mm
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.
262
No.4
No.3
No.4
No.3
No.4
No.3
Terminal No.
Contact No.
Contact Operation Table
Form “b” Contact Weld
Form “a” Contact Weld
Non-energized
11–12
No.1
Energized
No.2
7–8
No.3
5–6
No.4
9–10
No.1
No.2
No.1
No.2
No.1
No.2
.020
inch. Reliable isolation is thus ensured.
.020
Note: Contact gaps are shown at the initial state.
If the contacts change state owing to loading/breaking
it is necessary to check the actual loading.
Contact No.
No.4
No.3
terminal
No.4
No.3
Non-energized (when no. 2 contact is welded)
Welded
Energized (when no. 1 contact is welded)
No.
inch. Reliable isolation is thus ensured.
Contact No.
1
2
3
4
>0.5
>0.5
State of other contacts
1
>0.5
>0.5
2
>0.5
>0.5
3
No.1
No.2
No.1
No.2
>0.5
>0.5
4
If the No. 1 contact welds.
A gap of greater than 0.5 mm
tained at each of the two form "a" contacts (Nos.
2 and 4).
If the No. 2 contact welds.
Each of the two form "b" contacts (Nos. 1 and 3)
maintains a gap of greater than 0.5 mm
Empty cells: either closed or open
>0.5: contact gap is kept at min. 0.5 mm
.020 inch
is main-
.020
.020 inch
inch.