SF2D-DC24V Panasonic, SF2D-DC24V Datasheet - Page 5

• Manufacturer Part Number: SF2D-DC24V
• Description: General Purpose / Industrial Relays 6A 24V 2FORMA/2FORMB PCB
• Manufacturer: Panasonic

Specifications of SF2D-DC24V

• Contact Form: 2 Form A, 2 Form B
• Coil Voltage: 24 VDC
• Contact Rating: 6 A at 250 VAC, 6 A at 30 VDC
• Coil Termination: Solder Pin
• Contact Termination: Solder Pin
• Mounting Style: Through Hole
• Power Consumption: 500 mW
• Contact Material: Gold Flashed Silver Alloy
• Coil Current: 20.8 mA
• Coil Resistance: 1.152 K Ohms
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SF Double contact type
THE OPERATION OF SF RELAYS (when contacts are welded)
SF relays work to maintain a normal operating state even when the contact welding occur by overloading or short-circuit
currents. It is easy to make weld detection circuits and safety circuits in the design to ensure safety even if contacts weld.
1) 2 Form A 2 Form B type
If the form “b” contact (No. 1 and 3) welds, the armature becomes non-operational, the contact gaps at the three form “a” contacts are
maintained at greater than 0.5 mm
When the form “a” contacts (No. 2 or 4) weld, the armature remains in a non-returned state and the contact gap at the two form “b”
contact is maintained at greater than 0.5 mm
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
9–10
No.4
No.1
No.2
No.1
No.2
No.1
No.2
.020
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inch. Reliable isolation is thus ensured.
.020
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.
If the contacts change state owing to loading/breaking
it is necessary to check the actual loading.
terminal
Welded
No.4
No.3
No.4
No.3
Non-energized (when No. 2 contact is welded)
No.
Energized (when No. 1 contact is welded)
inch. Reliable isolation is thus ensured.
1
2
3
4
>0.5
>0.5
1
State of other contacts
>0.5
>0.5
2
>0.5
>0.5
3
No.1
No.2
No.1
No.2
>0.5
>0.5
4
Example: If the No. 1 contact welds
Each of the three form “a” contacts (No. 2 and 4)
maintain a gap of greater than 0.5 mm
Example: If the No. 2 contact welds.
The two form “b” contact (No. 1 or 3) maintains a gap of
greater than 0.5 mm
>0.5: contact gap is kept at
Empty cells: either closed or open
min. 0.5 mm
.020
.020 inch
inch.
.020
inch.