OptoMOS 1-Form-A (SPST-NO) Solid State Relays

Littelfuse offers an extensive portfolio of 1-Form-A (SPST-NO) Solid State Relays (SSRs) in various PC board-mount package sizes. These relays feature load current ratings from 50mA to 9A (20A with heat sink), and 30V to 1000V load voltage ratings. 1-Form-A relays are available in SOP-4, SIP-4, SMD DIP-4, SMD DIP-6, SOIC-16, Power i4-PAC, and ISOPLUS-264 packages. Fault-protected SSRs with active current limit and thermal shutdown are also available from Littelfuse to offer robust and rugged switching solutions.

All Results (277)

Select Image Part # Mfr. Description Datasheet Availability Pricing (HKD) Filter the results in the table by unit price based on your quantity. Qty. RoHS
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
500Expected 7/6/2027
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay
1,782Expected 16/10/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
1,100Expected 1/1/2027
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R
1,752Expected 13/1/2027
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
100Expected 16/9/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
380On Order
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 4PIN SIP
291Expected 11/12/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch
250Expected 23/11/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A
425Expected 17/9/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA
2,000Expected 16/11/2026
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR
92Expected 13/5/2027
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN SMD
200Expected 25/1/2027
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay
501Expected 25/11/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay Non-Stocked Lead-Time 36 Weeks
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay
150On Order
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR 23,000Factory Stock Available
Min.: 1,000
Mult.: 1,000
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR 16,150Factory Stock Available
Min.: 100
Mult.: 50

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA 550Factory Stock Available
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA 550Factory Stock Available
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA 12,000Factory Stock Available
Min.: 1,000
Mult.: 1,000
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay 950Factory Stock Available
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch 1,650Factory Stock Available
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole 1,000Factory Stock Available
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA 750Factory Stock Available
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A Non-Stocked Lead-Time 35 Weeks
Min.: 1,000
Mult.: 1,000
: 1,000