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 (PEN) 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 DPST-NO/NO 8PIN DIP PAA140 IXYS Integrated Circuits 1: S/ 51.65 2,008In Stock	Mfr. Part # PAA140 Mouser Part # 849-PAA140	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	2,008In Stock	S/ 51.65 S/ 47.10 S/ 45.35 S/ 43.71 View S/ 41.96 S/ 40.48 S/ 39.47 S/ 39.20	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay CPC1014N IXYS Integrated Circuits 1: S/ 12.38 203,858In Stock End of Life	Mfr. Part # CPC1014N Mouser Part # 849-CPC1014N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	203,858In Stock	S/ 12.38 S/ 11.02 S/ 10.24 S/ 9.89 View S/ 9.54 S/ 9.30 S/ 9.07 S/ 8.76	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay CPC1330GRTR IXYS Integrated Circuits 1: S/ 14.17 11,703In Stock End of Life	Mfr. Part # CPC1330GRTR Mouser Part # 849-CPC1330GRTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	11,703In Stock	Cut Tape S/ 14.17 S/ 12.65 S/ 12.07 S/ 11.48 Reel S/ 9.07 View S/ 11.13 S/ 10.63 S/ 10.28 S/ 8.95 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-4	MOSFET
Solid State Relays - PCB Mount 100V Single Pole 100V Power Relay CPC1918J IXYS Integrated Circuits 1: S/ 86.10 7,194In Stock 7,550Expected 1/13/2027 End of Life	Mfr. Part # CPC1918J Mouser Part # 849-CPC1918J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 100V Single Pole 100V Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,194In Stock 7,550Expected 1/13/2027	S/ 86.10 S/ 77.46 S/ 66.87 S/ 64.42 View S/ 62.75 S/ 60.68 S/ 59.17 Quote	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1035N IXYS Integrated Circuits 1: S/ 13.62 27,869In Stock End of Life	Mfr. Part # CPC1035N Mouser Part # 849-CPC1035N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	27,869In Stock	S/ 13.62 S/ 10.90 S/ 10.20 S/ 9.19 View S/ 8.95 S/ 8.64 S/ 8.37 S/ 8.21 S/ 8.17	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110STR IXYS Integrated Circuits 1: S/ 34.18 10,858In Stock End of Life	Mfr. Part # LAA110STR Mouser Part # 849-LAA110STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	10,858In Stock	Cut Tape S/ 34.18 S/ 30.44 S/ 29.08 S/ 28.10 Reel S/ 19.93 View S/ 27.13 S/ 25.69 S/ 24.80 S/ 19.89 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay CPC1016NTR IXYS Integrated Circuits 1: S/ 11.79 22,193In Stock End of Life	Mfr. Part # CPC1016NTR Mouser Part # 849-CPC1016NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	22,193In Stock	Cut Tape S/ 11.79 S/ 10.55 S/ 9.93 S/ 9.61 Reel S/ 7.40 View S/ 9.26 S/ 8.84 S/ 8.56 S/ 7.40 S/ 7.12 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount SPST NO Relay CPC1018N IXYS Integrated Circuits 1: S/ 20.05 42,444In Stock End of Life	Mfr. Part # CPC1018N Mouser Part # 849-CPC1018N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST NO Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	42,444In Stock	S/ 20.05 S/ 16.47 S/ 15.38 S/ 14.87 View S/ 13.62 S/ 13.20 S/ 13.00 S/ 12.77	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 350V 100mA Solid State Relay CPC1035NTR IXYS Integrated Circuits 1: S/ 13.00 9,043In Stock End of Life	Mfr. Part # CPC1035NTR Mouser Part # 849-CPC1035NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 350V 100mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	9,043In Stock	Cut Tape S/ 13.00 S/ 11.60 S/ 10.98 S/ 10.55 View Reel S/ 7.90 S/ 10.20 S/ 9.73 S/ 9.42 S/ 9.07 S/ 7.90 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA132 IXYS Integrated Circuits 1: S/ 62.12 269In Stock	Mfr. Part # PAA132 Mouser Part # 849-PAA132	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	269In Stock	S/ 62.12 S/ 55.35 S/ 52.86 S/ 45.08 S/ 43.09	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110S IXYS Integrated Circuits 1: S/ 53.44 241In Stock	Mfr. Part # PAA110S Mouser Part # 849-PAA110S	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	241In Stock	S/ 53.44 S/ 47.61 S/ 45.93 S/ 36.86 Quote Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 60V 600mA SSR PAA132S IXYS Integrated Circuits 1: S/ 62.12 1,240In Stock	Mfr. Part # PAA132S Mouser Part # 849-PAA132S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 60V 600mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,240In Stock	S/ 62.12 S/ 55.35 S/ 52.86 S/ 46.01 View S/ 44.53 S/ 41.92	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 60V 600mA SSR PAA132STR IXYS Integrated Circuits 1: S/ 62.55 1,188In Stock	Mfr. Part # PAA132STR Mouser Part # 849-PAA132STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 60V 600mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,188In Stock	Cut Tape S/ 62.55 S/ 55.62 S/ 52.82 S/ 50.06 View Reel S/ 40.01 S/ 47.25 S/ 44.37 S/ 42.86 S/ 40.01 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay LCA712 IXYS Integrated Circuits 1: S/ 43.21 848In Stock	Mfr. Part # LCA712 Mouser Part # 849-LCA712	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	848In Stock	S/ 43.21 S/ 38.50 S/ 36.78 S/ 31.53 S/ 29.97	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110STR IXYS Integrated Circuits 1: S/ 51.03 1,400In Stock	Mfr. Part # PAA110STR Mouser Part # 849-PAA110STR	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	1,400In Stock	Cut Tape S/ 51.03 S/ 45.50 S/ 43.44 S/ 41.96 View Reel S/ 35.03 S/ 40.25 S/ 38.26 S/ 36.94 S/ 35.03 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount SPST i4-PAC 60V CPC1908J IXYS Integrated Circuits 1: S/ 81.94 200In Stock End of Life	Mfr. Part # CPC1908J Mouser Part # 849-CPC1908J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST i4-PAC 60V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	200In Stock	S/ 81.94 S/ 73.02 S/ 69.75 S/ 67.34 View S/ 59.13 S/ 58.23 Quote	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount SPST 1 Form A LAA127 IXYS Integrated Circuits 1: S/ 41.18 611In Stock End of Life	Mfr. Part # LAA127 Mouser Part # 849-LAA127 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST 1 Form A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	611In Stock	S/ 41.18 S/ 37.56 S/ 36.08 S/ 34.88 View S/ 33.48 S/ 32.39 S/ 30.75	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM CPC1593GS IXYS Integrated Circuits 1: S/ 25.38 978In Stock End of Life	Mfr. Part # CPC1593GS Mouser Part # 849-CPC1593GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	978In Stock	S/ 25.38 S/ 22.62 S/ 21.60 S/ 18.96 View S/ 18.22 S/ 17.52 S/ 16.93 S/ 16.66	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1777J IXYS Integrated Circuits 1: S/ 81.28 186In Stock End of Life	Mfr. Part # CPC1777J Mouser Part # 849-CPC1777J 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	186In Stock	S/ 81.28 S/ 72.40 S/ 62.94 S/ 60.88 View S/ 59.83 S/ 59.28 Quote	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP LAA110S IXYS Integrated Circuits 1: S/ 32.00 1,865In Stock 100Expected 4/5/2027 End of Life	Mfr. Part # LAA110S Mouser Part # 849-LAA110S End of Life	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	1,865In Stock 100Expected 4/5/2027	S/ 32.00 S/ 29.82 S/ 27.95 S/ 26.98 View S/ 26.16 S/ 25.22	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 250V, 1-Form-A SSR CPC1010N IXYS Integrated Circuits 1: S/ 15.92 3,837In Stock End of Life	Mfr. Part # CPC1010N Mouser Part # 849-CPC1010N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V, 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,837In Stock	S/ 15.92 S/ 14.21 S/ 13.55 S/ 13.00 View S/ 12.49 S/ 11.91 S/ 10.55 S/ 10.28	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay CPC1986J IXYS Integrated Circuits 1: S/ 144.02 160In Stock End of Life	Mfr. Part # CPC1986J Mouser Part # 849-CPC1986J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	160In Stock	S/ 144.02 S/ 129.00 S/ 128.84 S/ 122.38 S/ 106.65	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay CPC1972GSTR IXYS Integrated Circuits 1: S/ 10.90 3,553In Stock End of Life	Mfr. Part # CPC1972GSTR Mouser Part # 849-CPC1972GSTR End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,553In Stock	Cut Tape S/ 10.90 S/ 8.95 S/ 8.25 S/ 7.55 Reel S/ 6.77 View S/ 6.66 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SMD/SMT
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160 IXYS Integrated Circuits 1: S/ 26.74 226In Stock	Mfr. Part # OMA160 Mouser Part # 849-OMA160	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	226In Stock	S/ 26.74 S/ 20.67 S/ 19.03 S/ 17.87 View S/ 17.48 S/ 17.44	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA PLA160S IXYS Integrated Circuits 1: S/ 30.01 174In Stock	Mfr. Part # PLA160S Mouser Part # 849-PLA160S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	174In Stock	S/ 30.01 S/ 27.87 S/ 26.12 S/ 25.38 View S/ 23.47 S/ 23.12 S/ 22.11 S/ 21.64 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET

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

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