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 DPST-NO/NO 8PIN DIP PAA140 IXYS Integrated Circuits 1: $17.25 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	$17.25 $15.73 $15.15 $14.60 View $14.01 $13.52 $13.18 $13.09	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount SPST NO Relay CPC1018N IXYS Integrated Circuits 1: $6.70 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	$6.70 $5.50 $5.14 $4.97 View $4.55 $4.41 $4.34 $4.26	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: $4.34 9,013In 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	9,013In Stock	Cut Tape $4.34 $3.87 $3.67 $3.52 View Reel $2.64 $3.41 $3.25 $3.15 $3.03 $2.64 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay CPC1014N IXYS Integrated Circuits 1: $4.13 203,858In 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	$4.13 $3.68 $3.42 $3.30 View $3.19 $3.11 $3.03 $2.93	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay CPC1330GRTR IXYS Integrated Circuits 1: $4.73 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 $4.73 $4.23 $4.03 $3.84 Reel $3.03 View $3.72 $3.55 $3.43 $2.99 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: $28.76 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	$28.76 $25.87 $22.33 $21.52 View $20.96 $20.27 $19.76 Quote	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1035N IXYS Integrated Circuits 1: $4.55 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	$4.55 $3.64 $3.41 $3.07 View $2.99 $2.89 $2.80 $2.74 $2.73	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110STR IXYS Integrated Circuits 1: $11.41 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 $11.41 $10.17 $9.71 $9.39 Reel $6.66 View $9.06 $8.58 $8.28 $6.64 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: $3.94 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 $3.94 $3.52 $3.32 $3.21 Reel $2.47 View $3.09 $2.95 $2.86 $2.47 $2.38 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay LCA712 IXYS Integrated Circuits 1: $14.43 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	$14.43 $12.86 $12.29 $10.53 $10.01	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: $17.04 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 $17.04 $15.20 $14.51 $14.01 View Reel $11.70 $13.44 $12.78 $12.34 $11.70 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA132 IXYS Integrated Circuits 1: $20.75 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	$20.75 $18.49 $17.65 $15.05 $14.39	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 60V 600mA SSR PAA132STR IXYS Integrated Circuits 1: $20.89 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 $20.89 $18.58 $17.64 $16.72 View Reel $13.36 $15.78 $14.82 $14.31 $13.36 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110S IXYS Integrated Circuits 1: $17.85 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	$17.85 $15.90 $15.48 $12.74 View $12.64 $12.45 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: $20.75 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	$20.75 $18.49 $17.65 $15.37 View $14.87 $14.00	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1777J IXYS Integrated Circuits 1: $27.14 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	$27.14 $24.18 $21.02 $20.33 View $19.98 $19.80 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: $10.69 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	$10.69 $9.96 $9.33 $9.01 View $8.74 $8.42	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay CPC1972GSTR IXYS Integrated Circuits 1: $3.64 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 $3.64 $2.99 $2.76 $2.52 Reel $2.26 View $2.22 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SMD/SMT
Solid State Relays - PCB Mount SPST i4-PAC 60V CPC1908J IXYS Integrated Circuits 1: $27.39 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	$27.39 $24.41 $23.30 $22.49 View $20.32 $19.50	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount SPST 1 Form A LAA127 IXYS Integrated Circuits 1: $13.75 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	$13.75 $12.55 $12.05 $11.65 View $11.18 $10.82 $10.27	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: $8.48 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	$8.48 $7.55 $7.22 $6.33 View $6.08 $5.85 $5.66 $5.56	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount 250V, 1-Form-A SSR CPC1010N IXYS Integrated Circuits 1: $5.32 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	$5.32 $4.75 $4.52 $4.34 View $4.17 $3.98 $3.52 $3.43	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: $48.10 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	$48.10 $43.11 $43.03 $40.87 $36.01	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160 IXYS Integrated Circuits 1: $8.93 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	$8.93 $6.90 $6.36 $5.97 View $5.84 $5.82	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA PLA160S IXYS Integrated Circuits 1: $10.08 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	$10.08 $9.35 $8.76 $8.52 View $7.90 $7.72 $7.38 $7.24 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET

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

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