SF2-24V PANASONIC EW, SF2-24V Datasheet - Page 4

• Manufacturer Part Number: SF2-24V
• Description: RELAY, FORCED CONTACT, DPCO, 24VDC
• Manufacturer: PANASONIC EW

Specifications of SF2-24V

• Coil Voltage Vdc Nom: 24V
• Coil Resistance: 1.152kohm
• Contact Current Max: 6A
• Contact Voltage Ac Nom: 250V
• Contact Voltage Dc Nom: 30V
• No. Of Poles: 2
• Relay Mounting: PC Board
• External Width: 25mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SF
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 and safety circuits in the design to ensure safety even if contacts weld.
1) 2a2b Type
If the form “b” contacts (No. 1 or 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 form “a” contacts (No. 2 or 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.
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
.020
inch. Reliable isolation is thus ensured.
inch. Reliable isolation is thus ensured.
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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.
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)
Contact No.
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
If the No. 1 contact welds.
A gap of greater than 0.5 mm
maintained at each of the two form “a” contacts
(No. 2 and 4).
If the No. 2 contact welds.
Each of the two form “b” contacts (No. 1 and 3)
maintains a gap of greater than 0.5 mm
inch.
Empty cells: either closed or open
>0.5: contact gap is kept at
min. 0.5 mm
.020 inch
.020 inch
is
.020