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 600V 90mA Single OptoMOS Relay
Datasheet
5.090In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation
Datasheet
1.287In Stock
4.000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay
Datasheet
406In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay
Datasheet
497In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP
Datasheet
1.242In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM
Datasheet
1.025In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R
Datasheet
352In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V Single Pole DC Power Relay
Datasheet
572In Stock
Min.: 1
Mult.: 1

PCB Mount i4-PAC MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 4PIN SIP
Datasheet
255In Stock
Min.: 1
Mult.: 1

PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 100V Single Pole SIP Power Relay
Datasheet
900In Stock
Min.: 1
Mult.: 1

PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SP, NO ISOPLUS-264
Datasheet
238In Stock
Min.: 1
Mult.: 1

PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 8-Pin Power SOIC
Datasheet
1.681In Stock
Min.: 1
Mult.: 1

PCB Mount ISOPLUS264 SCR
IXYS Integrated Circuits Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay
Datasheet
3.684In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

SMD/SMT
IXYS Integrated Circuits Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay
Datasheet
2.775In Stock
5.975On Order
Min.: 1
Mult.: 1

Through Hole SIP-4 1 Channel PhotoSCR
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST i4-PAC 600V
Datasheet
808In Stock
450Expected 23/04/2027
Min.: 1
Mult.: 1

PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 4PIN SOP
Datasheet
95In Stock
175Expected 23/04/2027
Min.: 1
Mult.: 1

PCB Mount ISOPLUS264 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1000V Single Pole SIP Power Relay
Datasheet
1.935In Stock
1.025Expected 02/07/2026
Min.: 1
Mult.: 1

PCB Mount SIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A
Datasheet
164In Stock
Min.: 1
Mult.: 1

PCB Mount SOIC-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 100V 300mA Double Pole Relay
Datasheet
581In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 100V 300mA Double Pole Relay
Datasheet
1.552In Stock
2.000Expected 02/07/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 120MA DPST 8-DIP
Datasheet
4.050In Stock
1.600Expected 21/12/2026
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP
Datasheet
1.573In Stock
1.000Expected 04/12/2026
Min.: 1
Mult.: 1

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST 1 Form A
Datasheet
621In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole
Datasheet
126In Stock
3.000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

PCB Mount SMD DIP-8 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN DIP
Datasheet
5.369In Stock
9.750Expected 20/08/2026
Min.: 1
Mult.: 1

PCB Mount DIP-6 MOSFET