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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Description Datasheet Availability Pricing (PHP) 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 SP-NO SS OptoMOS Relay
Datasheet
2,664In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

PCB Mount MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6PIN DIP
Datasheet
3,262In Stock
10,050On Order
Min.: 1
Mult.: 1

PCB Mount DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount SPST-NO 6 Pin SMD
Datasheet
2,434In Stock
3,500On Order
Min.: 1
Mult.: 1

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET
Datasheet
6,951In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET
Datasheet
3,106In Stock
Min.: 1
Mult.: 1

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET
Datasheet
10,738In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

PCB Mount SMD DIP-6 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA
Datasheet
3,261In Stock
32,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

PCB Mount MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay
Datasheet
36,228In Stock
20,100Expected 12/05/2027
Min.: 1
Mult.: 1

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP
Datasheet
34,452In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 100V 150mA Solid State Relay
Datasheet
34,121In Stock
90,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V, 1-Form-A SSR
Datasheet
5,040In Stock
Min.: 1
Mult.: 1

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 250V, 1-Form-A SSR
Datasheet
10,384In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay
Datasheet
25,959In Stock
38,000Expected 14/12/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay
Datasheet
3,946In Stock
Min.: 1
Mult.: 1

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay
Datasheet
43,707In Stock
136,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay
Datasheet
24,911In Stock
22,000Expected 02/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay
Datasheet
9,770In Stock
100,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay
Datasheet
7,469In Stock
400Expected 06/01/2027
Min.: 1
Mult.: 1

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay
Datasheet
3,084In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

PCB Mount SOP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay
Datasheet
11,831In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

PCB Mount SMD DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay
Datasheet
1,305In Stock
Min.: 1
Mult.: 1

PCB Mount DIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay
Datasheet
5,014In Stock
1,000Expected 21/09/2026
Min.: 1
Mult.: 1

PCB Mount MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount 1-Form-A; 60V, 4ADC 2500Vrms Isolation
Datasheet
6,401In Stock
3,775Expected 14/06/2027
Min.: 1
Mult.: 1

PCB Mount SIP-4 MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
Datasheet
1,501In Stock
3,100On Order
Min.: 1
Mult.: 1

PCB Mount i4-PAC MOSFET
IXYS Integrated Circuits Solid State Relays - PCB Mount DC Only Single Pole i4-PAC
Datasheet
368In Stock
Min.: 1
Mult.: 1

PCB Mount i4-PAC MOSFET