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 (297)

Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (PHP) Filter the results in the table by unit price based on your quantity.
Qty. RoHS
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA
Datasheet
9,000Expected 08/02/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole Relay 400V 140mA
Datasheet
600Expected 25/09/2026
Min.: 1
Mult.: 1

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

IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
1,100Expected 01/01/2027
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R
Datasheet
1,752Expected 13/01/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
Datasheet
100Expected 04/12/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 4PIN SIP
Datasheet
276Expected 11/12/2026
Min.: 1
Mult.: 1

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

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA
Datasheet
2,000Expected 19/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET
Datasheet
2,000Expected 18/01/2027
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay
Datasheet
1,416On Order
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR
Datasheet
300Expected 21/12/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA
Datasheet
1,825On Order
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay
Datasheet
200On Order
Min.: 1
Mult.: 1

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

IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole
Datasheet
48Expected 19/08/2026
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN SMD
Datasheet
200Expected 25/01/2027
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount Single Pole Relay 400V 140mA
Datasheet
Non-Stocked Lead-Time 23 Weeks
Min.: 500
Mult.: 100

IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
Datasheet
Non-Stocked Lead-Time 23 Weeks
Min.: 500
Mult.: 100

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


IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay
Datasheet
Non-Stocked Lead-Time 34 Weeks
Min.: 500
Mult.: 50

IXYS Integrated Circuits Solid State Relays - PCB Mount 60V, 1A, Single Pole, Normally Open Current Limiting Relay
Datasheet
Non-Stocked Lead-Time 23 Weeks
Min.: 1
Mult.: 1

IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
Non-Stocked Lead-Time 23 Weeks
Min.: 500
Mult.: 50

IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
Non-Stocked Lead-Time 23 Weeks
Min.: 1,000
Mult.: 1,000
: 1,000

IXYS Integrated Circuits Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch
Datasheet
1,550Factory Stock Available
More Info Available
Min.: 1
Mult.: 1