Optocouplers/Photocouplers

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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.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Output Type
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP CPC1593G IXYS Integrated Circuits 1: $6.52 499Expected 03/11/2027 End of Life	Mfr. Part No. CPC1593G Mouser Part No 849-CPC1593G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	499Expected 03/11/2027	$6.52 $5.81 $5.55 $5.35 View $5.17 $4.56	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R CPC1593GSTR IXYS Integrated Circuits 1: $6.23 1,742Expected 04/11/2027 End of Life	Mfr. Part No. CPC1593GSTR Mouser Part No 849-CPC1593GSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,742Expected 04/11/2027	Cut Tape $6.23 $5.55 $5.30 $5.12 Reel $4.46 View $4.95 $4.71 $4.61 $4.44 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1779J IXYS Integrated Circuits 1: $27.54 100On Order End of Life	Mfr. Part No. CPC1779J Mouser Part No 849-CPC1779J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount DC Only Single Pole i4-PAC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	100On Order	$27.54 $24.84 $23.62 $22.62	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SIP CPC1906Y IXYS Integrated Circuits 1: $12.51 289Expected 23/07/2027 End of Life	Mfr. Part No. CPC1906Y Mouser Part No 849-CPC1906Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	289Expected 23/07/2027	$12.51 $11.15 $10.62 $10.28 View $9.91 $8.67	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch CPC1943GS IXYS Integrated Circuits 1: $13.63 250Expected 30/11/2026 End of Life	Mfr. Part No. CPC1943GS Mouser Part No 849-CPC1943GS End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	250Expected 30/11/2026	$13.63 $10.65 $9.53 $9.20	Min.: 1 Mult.: 1	SMD/SMT	SMD-DIP-6
Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A CPC2907B IXYS Integrated Circuits 1: $20.95 785On Order End of Life	Mfr. Part No. CPC2907B Mouser Part No 849-CPC2907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	785On Order On Order Ship Dates Mfr. No: CPC2907B Stock: 0 On Order: 435 Expected 03/11/2026 350 Expected 19/07/2027 Factory Lead Time: 39 Weeks	$20.95 $18.64 $17.12 $16.54 $15.97	Min.: 1 Mult.: 1	PCB Mount	SOIC-8	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110LSTR IXYS Integrated Circuits 1: $4.37 2,000Expected 14/01/2027 End of Life	Mfr. Part No. LCA110LSTR Mouser Part No 849-LCA110LSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,000Expected 14/01/2027	Cut Tape $4.37 $3.99 $3.68 $3.53 View Reel $3.03 $3.41 $3.25 $3.14 $3.03 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182S IXYS Integrated Circuits 1: $5.40 499On Order End of Life	Mfr. Part No. LCA182S Mouser Part No 849-LCA182S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	499On Order On Order Ship Dates Mfr. No: LCA182S Stock: 0 On Order: 249 Expected 19/05/2027 250 Expected 09/06/2027 Factory Lead Time: 36 Weeks	$5.40 $4.87 $4.50 $4.27 View $4.05 $3.87 $3.57	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN SMD PLA140S IXYS Integrated Circuits 1: $9.46 200Expected 15/03/2027	Mfr. Part No. PLA140S Mouser Part No 849-PLA140S	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN SMD Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	200Expected 15/03/2027	$9.46 $8.69 $8.01 $7.68 View $7.38 $7.05	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225N IXYS Integrated Circuits 1: $3.78 501Expected 19/02/2027 End of Life	Mfr. Part No. CPC1225N Mouser Part No 849-CPC1225N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	501Expected 19/02/2027	$3.78 $3.54 $3.15 $2.99 View $2.90 $2.77 $2.68	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay CPC1926Y IXYS Integrated Circuits 1: $11.30 188Expected 23/11/2026 End of Life	Mfr. Part No. CPC1926Y Mouser Part No 849-CPC1926Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	188Expected 23/11/2026	$11.30 $10.34 $9.31 $8.93 View $8.54 $8.15	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710RTR IXYS Integrated Circuits 1,000: $6.46 Non-Stocked Lead-Time 35 Weeks	Mfr. Part No. LCA710RTR Mouser Part No 849-LCA710RTR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 35 Weeks	Reel $6.46	Min.: 1,000 Mult.: 1,000 : 1,000	PCB Mount		MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP OAA160 IXYS Integrated Circuits 1: $12.16 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. OAA160 Mouser Part No 849-OAA160	IXYS Integrated Circuits	Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$12.16 $10.83 $10.35 $9.99 View $9.65 $9.21	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR OAA160STR IXYS Integrated Circuits 1: $11.71 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. OAA160STR Mouser Part No 849-OAA160STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Cut Tape $11.71 $10.44 $9.97 $9.63 Reel $8.28 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160STR IXYS Integrated Circuits 1,000: $4.52 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. OMA160STR Mouser Part No 849-OMA160STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Reel $4.52	Min.: 1,000 Mult.: 1,000 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110L IXYS Integrated Circuits 100: $13.11 Non-Stocked Lead-Time 35 Weeks	Mfr. Part No. PAA110L Mouser Part No 849-PAA110L	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 35 Weeks	$13.11	Min.: 100 Mult.: 50	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LS IXYS Integrated Circuits 1: $13.83 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA110LS Mouser Part No 849-PAA110LS	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$13.83 $12.93 $12.33 $11.68 $10.41	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LSTR IXYS Integrated Circuits 1,000: $9.57 Non-Stocked Lead-Time 35 Weeks	Mfr. Part No. PAA110LSTR Mouser Part No 849-PAA110LSTR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 35 Weeks	Reel $9.57	Min.: 1,000 Mult.: 1,000 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DUAL POLE CIRCUITS PAA127 IXYS Integrated Circuits 1: $7.38 Non-Stocked	Mfr. Part No. PAA127 Mouser Part No 849-PAA127	IXYS Integrated Circuits	Solid State Relays - PCB Mount DUAL POLE CIRCUITS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked	$7.38 $6.92 $6.15 $5.84 View $5.53 $5.19 $5.01 $4.84	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Solid State Relays - PCB Mount Dual Single-Pole 1-Form-A, 280V,200mA PAA127STR IXYS Integrated Circuits 1,000: $4.63 Non-Stocked	Mfr. Part No. PAA127STR Mouser Part No 849-PAA127STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual Single-Pole 1-Form-A, 280V,200mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked	Reel $4.63	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140L IXYS Integrated Circuits 100: $12.01 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA140L Mouser Part No 849-PAA140L	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$12.01	Min.: 100 Mult.: 50	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Single Pole Dual 1-Form-A Relay PAA140LSTR IXYS Integrated Circuits 1,000: $10.44 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA140LSTR Mouser Part No 849-PAA140LSTR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole Dual 1-Form-A Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Reel $10.44	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA190 IXYS Integrated Circuits 100: $10.50 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA190 Mouser Part No 849-PAA190	IXYS Integrated Circuits	Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$10.50	Min.: 100 Mult.: 50	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA190S IXYS Integrated Circuits 100: $10.50 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA190S Mouser Part No 849-PAA190S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$10.50	Min.: 100 Mult.: 50	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA190STR IXYS Integrated Circuits 1,000: $9.01 Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA190STR Mouser Part No 849-PAA190STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Reel $9.01	Min.: 1,000 Mult.: 1,000 : 1,000	PCB Mount	SMD DIP-8	MOSFET

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

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