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 (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Number of Channels	Output Type
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225NTR IXYS Integrated Circuits 1: €3.07 9,920Expected 12/08/2027 End of Life	Mfr. Part No. CPC1225NTR Mouser Part No 849-CPC1225NTR 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	9,920Expected 12/08/2027	Cut Tape €3.07 €3.04 Reel €2.07 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay CPC1510GSTR IXYS Integrated Circuits 1: €5.77 1,834In Stock 9,000Expected 06/01/2028 End of Life	Mfr. Part No. CPC1510GSTR Mouser Part No 849-CPC1510GSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,834In Stock 9,000Expected 06/01/2028	Cut Tape €5.77 €5.28 €4.86 €4.73 Reel €4.73 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay CPC1560GS IXYS Integrated Circuits 1: €7.19 3,298On Order End of Life	Mfr. Part No. CPC1560GS Mouser Part No 849-CPC1560GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,298On Order On Order Ship Dates Mfr. No: CPC1560GS Stock: 0 On Order: 998 Expected 09/11/2026 1,000 Expected 08/12/2027 1,300 Expected 09/12/2027 Factory Lead Time: 66 Weeks	€7.19 €6.74 €5.99 €5.69 View €5.39 €5.03	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1978J IXYS Integrated Circuits 1: €21.91 860On Order End of Life	Mfr. Part No. CPC1978J Mouser Part No 849-CPC1978J 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	860On Order On Order Ship Dates Mfr. No: CPC1978J Stock: 0 On Order: 535 Expected 13/01/2027 325 Expected 31/03/2027 Factory Lead Time: 54 Weeks	€21.91 €20.14 €19.08 €18.03	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		MOSFET
Solid State Relays - PCB Mount SPST iso PLUS-264 CPC1979J IXYS Integrated Circuits 1: €34.59 6,034On Order End of Life	Mfr. Part No. CPC1979J Mouser Part No 849-CPC1979J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST iso PLUS-264 Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6,034On Order On Order Ship Dates Mfr. No: CPC1979J Stock: 0 On Order: 5,809 Expected 10/12/2027 225 Expected 16/12/2027 Factory Lead Time: 73 Weeks	€34.59 €30.93 €29.48 €28.41	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		MOSFET
Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation CPC1983Y IXYS Integrated Circuits 1: €9.23 7,435On Order End of Life	Mfr. Part No. CPC1983Y Mouser Part No 849-CPC1983Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,435On Order On Order Ship Dates Mfr. No: CPC1983Y Stock: 0 On Order: 5,510 Expected 29/07/2027 1,925 Expected 05/08/2027 Factory Lead Time: 40 Weeks	€9.23 €8.45 €7.77 €7.43 View €6.99 €6.67	Min.: 1 Mult.: 1	PCB Mount	SIP-4		MOSFET
Solid State Relays - PCB Mount RELAY, SS ICS CPC1983YE IXYS Integrated Circuits 1: €9.42 12,866On Order End of Life	Mfr. Part No. CPC1983YE Mouser Part No 849-CPC1983YE End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY, SS ICS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	12,866On Order On Order Ship Dates Mfr. No: CPC1983YE Stock: 0 On Order: 7,016 Expected 18/11/2026 5,850 Expected 29/01/2027 Factory Lead Time: 37 Weeks	€9.42 €8.76 €8.02 €7.74 View €7.47 €7.14	Min.: 1 Mult.: 1	PCB Mount	SIP-4		MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108STR IXYS Integrated Circuits 1: €4.58 7,000On Order End of Life	Mfr. Part No. LAA108STR Mouser Part No 849-LAA108STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 100V 300mA Double Pole Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,000On Order On Order Ship Dates Mfr. No: LAA108STR Stock: 0 On Order: 5,000 Expected 28/07/2027 2,000 Expected 30/07/2027 Factory Lead Time: 36 Weeks	Cut Tape €4.58 €4.14 €3.82 €3.62 View Reel €3.01 €3.45 €3.29 €3.18 €3.01 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8		MOSFET
Triac & SCR Output Optocouplers AC SS Power Switch Dual Power SCR Out CPC1976YX6 IXYS Integrated Circuits 1: €9.12 Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. CPC1976YX6 Mouser Part No 849-CPC1976YX6	IXYS Integrated Circuits	Triac & SCR Output Optocouplers AC SS Power Switch Dual Power SCR Out Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 23 Weeks	€9.12 €7.44 €6.44 €6.05	Min.: 1 Mult.: 1	Through Hole		1 Channel	PhotoSCR
Solid State Relays - PCB Mount 1-Form-A SSR LCA701 IXYS Integrated Circuits 1: €10.22 707On Order	Mfr. Part No. LCA701 Mouser Part No 849-LCA701	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	707On Order On Order Ship Dates Mfr. No: LCA701 Stock: 0 On Order: 107 Expected 16/11/2026 600 Expected 15/07/2027 Factory Lead Time: 36 Weeks	€10.22 €8.98 €8.56 €8.18 View €7.80 €6.98	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710R IXYS Integrated Circuits 1: €8.59 946Expected 02/12/2026	Mfr. Part No. LCA710R Mouser Part No 849-LCA710R	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	946Expected 02/12/2026	€8.59 €8.08 €7.24 €6.89 View €6.60 €6.30	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA712STR IXYS Integrated Circuits 1: €9.67 1,300Expected 21/01/2027	Mfr. Part No. LCA712STR Mouser Part No 849-LCA712STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,300Expected 21/01/2027	Cut Tape €9.67 €8.62 €8.23 €7.93 View Reel €6.45 €7.59 €7.10 €6.85 €6.45 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount			MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA110 IXYS Integrated Circuits 1: €12.31 35Expected 13/01/2027	Mfr. Part No. PAA110 Mouser Part No 849-PAA110	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	35Expected 13/01/2027	€12.31 €10.94 €10.40 €9.67 €9.33	Min.: 1 Mult.: 1	PCB Mount	DIP-8		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150 IXYS Integrated Circuits 1: €12.23 92Expected 19/07/2027	Mfr. Part No. PAA150 Mouser Part No 849-PAA150	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	92Expected 19/07/2027	€12.23 €10.88 €10.36 €9.81 €9.48	Min.: 1 Mult.: 1	PCB Mount	DIP-8		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA191S IXYS Integrated Circuits 1: €12.59 712Expected 08/02/2027	Mfr. Part No. PAA191S Mouser Part No 849-PAA191S	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	712Expected 08/02/2027	€12.59 €11.22 €10.72 €10.33 View €9.98 €9.52	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110STR IXYS Integrated Circuits 1: €6.35 2,996Expected 08/02/2027	Mfr. Part No. PLA110STR Mouser Part No 849-PLA110STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,996Expected 08/02/2027	Cut Tape €6.35 €6.22 Reel €4.41 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA PLA192S IXYS Integrated Circuits 1: €6.09 1,825Expected 08/02/2027	Mfr. Part No. PLA192S Mouser Part No 849-PLA192S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,825Expected 08/02/2027	€6.09 €5.43 €5.19 €5.01 View €4.83 €4.62	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR CPC1009NTR IXYS Integrated Circuits 1: €2.61 1,741Expected 02/08/2027 End of Life	Mfr. Part No. CPC1009NTR Mouser Part No 849-CPC1009NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,741Expected 02/08/2027	Cut Tape €2.61 €2.37 €2.18 €2.12 View Reel €1.69 €2.05 €1.96 €1.87 €1.69 €1.69 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1030N IXYS Integrated Circuits 1: €3.39 3,617On Order End of Life	Mfr. Part No. CPC1030N Mouser Part No 849-CPC1030N 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	3,617On Order On Order Ship Dates Mfr. No: CPC1030N Stock: 0 On Order: 1,417 Expected 05/04/2027 2,200 Expected 19/04/2027 Factory Lead Time: 23 Weeks	€3.39 €3.02 €2.89 €2.78 View €2.67 €2.54 €2.47 €2.38	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay CPC1030NTR IXYS Integrated Circuits 1: €3.28 50In Stock 4,000Expected 08/03/2027 End of Life	Mfr. Part No. CPC1030NTR Mouser Part No 849-CPC1030NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	50In Stock 4,000Expected 08/03/2027	Cut Tape €3.28 €3.00 €2.76 €2.67 View Reel €2.24 €2.56 €2.44 €2.37 €2.28 €2.24 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390GR IXYS Integrated Circuits 1: €3.93 600On Order End of Life	Mfr. Part No. CPC1390GR Mouser Part No 849-CPC1390GR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole Relay 400V 140mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	600On Order On Order Ship Dates Mfr. No: CPC1390GR Stock: 0 On Order: 500 Expected 04/11/2026 100 Expected 02/12/2026 Factory Lead Time: 36 Weeks	€3.93 €3.54 €3.31 €3.17 View €3.04 €2.91	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394G IXYS Integrated Circuits 1: €4.30 500Expected 03/02/2027 End of Life	Mfr. Part No. CPC1394G Mouser Part No 849-CPC1394G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	500Expected 03/02/2027	€4.30 €3.93 €3.69 €3.56 View €3.44 €3.26 €3.17	Min.: 1 Mult.: 1	PCB Mount	DIP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay CPC1510GS IXYS Integrated Circuits 1: €5.97 2,502On Order End of Life	Mfr. Part No. CPC1510GS Mouser Part No 849-CPC1510GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,502On Order On Order Ship Dates Mfr. No: CPC1510GS Stock: 0 On Order: 1,752 Expected 14/01/2027 750 Expected 26/04/2027 Factory Lead Time: 54 Weeks	€5.97 €5.24 €4.99 €4.82 View €4.65 €4.44	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1563GS IXYS Integrated Circuits 1: €5.74 1,100Expected 15/04/2027 End of Life	Mfr. Part No. CPC1563GS Mouser Part No 849-CPC1563GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,100Expected 15/04/2027	€5.74 €5.25 €4.83 €4.58 View €4.42 €4.21	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP CPC1593G IXYS Integrated Circuits 1: €5.61 499Expected 01/02/2027 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 01/02/2027	€5.61 €5.00 €4.77 €4.60 View €4.45 €3.92	Min.: 1 Mult.: 1	PCB Mount	DIP-6		MOSFET