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.

Types of Optocouplers/Photocouplers
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Results: 297
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Description Datasheet Availability Pricing (IDR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS Mounting Style
Package/Case
Number of Channels
Output Type
IXYS Integrated Circuits Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR
Datasheet
76In Stock
6.100On Order
Min.: 1
Mult.: 1

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay
Datasheet
3In Stock
800Expected 25/11/2026
Min.: 1
Mult.: 1

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay
Datasheet
570In Stock
1.500On Order
Min.: 1
Mult.: 1

PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay
Datasheet
52In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
Datasheet
257In Stock
600On Order
Min.: 1
Mult.: 1

PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
40In Stock
2.950On Order
Min.: 1
Mult.: 1

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
9In Stock
Min.: 1
Mult.: 1
: 1.000

PCB Mount MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay
Datasheet
31In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R
Datasheet
22In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
Datasheet
19In Stock
75Expected 21/07/2026
Min.: 1
Mult.: 1

PCB Mount i4-PAC MOSFET
IXYS Integrated Circuits Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay
Datasheet
105In Stock
Min.: 1
Mult.: 1

Through Hole DIP-16
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch
Datasheet
2In Stock
250Expected 31/07/2026
Min.: 1
Mult.: 1

PCB Mount SCR
IXYS Integrated Circuits Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay
Datasheet
35In Stock
Min.: 1
Mult.: 1

Through Hole Power SIP
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation
Datasheet
22In Stock
5.250On Order
Min.: 1
Mult.: 1

PCB Mount SIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole
Datasheet
149In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole
Datasheet
96In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole
Datasheet
6In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole
Datasheet
56In Stock
100Expected 10/08/2026
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole
Datasheet
3In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DUAL POLE
Datasheet
50In Stock
100Expected 05/08/2026
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole
Datasheet
85In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole
Datasheet
83In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole
Datasheet
90In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP
Datasheet
103In Stock
150Expected 06/08/2026
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA
Datasheet
43In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-6 MOSFET