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 60V 1000 mA SSR w/optic MOSFET LCA710STR IXYS Integrated Circuits 1: €8.63 4,792In Stock	Mfr. Part No. LCA710STR Mouser Part No 849-LCA710STR	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	4,792In Stock	Cut Tape €8.63 €8.09 €7.20 €6.84 View Reel €5.52 €6.48 €5.93 €5.72 €5.52 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715STR IXYS Integrated Circuits 1: €9.30 3,624In Stock 5,000Expected 30/07/2027	Mfr. Part No. LCA715STR Mouser Part No 849-LCA715STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,624In Stock 5,000Expected 30/07/2027	Cut Tape €9.30 €8.28 €7.91 €7.64 View Reel €6.44 €7.38 €7.03 €6.79 €6.44 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP CPC1006NTR IXYS Integrated Circuits 1: €1.84 30,277In Stock End of Life	Mfr. Part No. CPC1006NTR Mouser Part No 849-CPC1006NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	30,277In Stock	Cut Tape €1.84 €1.77 €1.69 €1.63 Reel €1.31 View €1.57 €1.49 €1.44 €1.31 €1.26 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 250V, 1-Form-A SSR CPC1010NTR IXYS Integrated Circuits 1: €3.36 8,979In Stock 6,000Expected 24/05/2027 End of Life	Mfr. Part No. CPC1010NTR Mouser Part No 849-CPC1010NTR 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	8,979In Stock 6,000Expected 24/05/2027	Cut Tape €3.36 €2.99 €2.86 €2.74 View Reel €2.35 €2.65 €2.53 €2.44 €2.36 €2.35 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount SPNO RELAY CPC1017N IXYS Integrated Circuits 1: €0.918 188,979In Stock 120,000Expected 23/06/2027 End of Life	Mfr. Part No. CPC1017N Mouser Part No 849-CPC1017N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPNO RELAY Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	188,979In Stock 120,000Expected 23/06/2027	€0.918	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay CPC1019NTR IXYS Integrated Circuits 1: €3.36 61,647In Stock End of Life	Mfr. Part No. CPC1019NTR Mouser Part No 849-CPC1019NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	61,647In Stock	Cut Tape €3.36 €2.99 €2.86 €2.75 View Reel €2.29 €2.66 €2.54 €2.45 €2.37 €2.29 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A CPC1020N IXYS Integrated Circuits 1: €5.78 34,160In Stock End of Life	Mfr. Part No. CPC1020N Mouser Part No 849-CPC1020N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	34,160In Stock	€5.78 €5.16 €4.88 €4.67 View €4.38 €4.14 €3.81	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay CPC1020NTR IXYS Integrated Circuits 1: €5.21 101,831In Stock End of Life	Mfr. Part No. CPC1020NTR Mouser Part No 849-CPC1020NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	101,831In Stock	Cut Tape €5.21 €4.64 €4.44 €4.28 View Reel €3.66 €4.14 €3.94 €3.80 €3.72 €3.66 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025N IXYS Integrated Circuits 1: €2.79 7,425In Stock 400Expected 30/07/2027 End of Life	Mfr. Part No. CPC1025N Mouser Part No 849-CPC1025N 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	7,425In Stock 400Expected 30/07/2027	€2.79 €2.49 €2.37 €2.29 View €2.19 €2.09 €2.02 €1.95	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1230N IXYS Integrated Circuits 1: €3.23 1,753In Stock End of Life	Mfr. Part No. CPC1230N Mouser Part No 849-CPC1230N 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	1,753In Stock	€3.23 €2.95 €2.71 €2.57 View €2.49 €2.37 €2.30 €2.15 €2.08	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay CPC1230NTR IXYS Integrated Circuits 1: €2.99 2,149In Stock End of Life	Mfr. Part No. CPC1230NTR Mouser Part No 849-CPC1230NTR 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	2,149In Stock	Cut Tape €2.99 €2.80 €2.49 €2.38 View Reel €2.06 €2.30 €2.20 €2.12 €2.06 €2.06 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1708J IXYS Integrated Circuits 1: €16.58 492In Stock End of Life	Mfr. Part No. CPC1708J Mouser Part No 849-CPC1708J 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	492In Stock	€16.58 €14.77 €14.10 €13.61 View €13.15 €12.43 €12.00 €11.62	Min.: 1 Mult.: 1	PCB Mount	i4-PAC		MOSFET
Solid State Relays - PCB Mount 250V Single Pole DC Power Relay CPC1726Y IXYS Integrated Circuits 1: €7.22 572In Stock End of Life	Mfr. Part No. CPC1726Y Mouser Part No 849-CPC1726Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V Single Pole DC Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	572In Stock	€7.22 €6.76 €6.01 €5.71 View €5.41 €5.05 €4.88 €4.70	Min.: 1 Mult.: 1	PCB Mount	i4-PAC		MOSFET
Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay CPC1907B IXYS Integrated Circuits 1: €10.34 7,212In Stock 17,625Expected 30/07/2027 End of Life	Mfr. Part No. CPC1907B Mouser Part No 849-CPC1907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,212In Stock 17,625Expected 30/07/2027	€10.34 €9.20 €8.75 €8.38 View €8.03 €7.67 €7.40 €7.16 Quote	Min.: 1 Mult.: 1	PCB Mount	SOIC-8		MOSFET
Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay CPC1968J IXYS Integrated Circuits 1: €39.02 921In Stock 375Expected 09/11/2026 End of Life	Mfr. Part No. CPC1968J Mouser Part No 849-CPC1968J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	921In Stock 375Expected 09/11/2026	€39.02 €36.52 €33.18	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		MOSFET
Solid State Relays - PCB Mount 600V AC/DC 1-FORM-A ENHANCED ISO PSIP CPC1984Y IXYS Integrated Circuits 1: €14.91 3,775In Stock End of Life	Mfr. Part No. CPC1984Y Mouser Part No 849-CPC1984Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V AC/DC 1-FORM-A ENHANCED ISO PSIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,775In Stock	€14.91 €13.29 €12.69 €12.25 View €11.80 €11.17 €10.78 Quote	Min.: 1 Mult.: 1	PCB Mount	SIP-4		MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LSTR IXYS Integrated Circuits 1: €7.72 698In Stock End of Life	Mfr. Part No. LAA110LSTR Mouser Part No 849-LAA110LSTR 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	698In Stock	Cut Tape €7.72 €6.89 €6.58 €6.35 Reel €5.41 View €6.13 €5.81 €5.61 €5.10 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110L IXYS Integrated Circuits 1: €3.77 1,116In Stock End of Life	Mfr. Part No. LCA110L Mouser Part No 849-LCA110L 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	1,116In Stock	€3.77 €3.51 €3.35 €3.24 View €3.13 €2.92 €2.80 €2.73 €2.47	Min.: 1 Mult.: 1	PCB Mount	DIP-6		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110STR IXYS Integrated Circuits 1: €3.50 9,047In Stock 4,000Expected 09/08/2027 End of Life	Mfr. Part No. LCA110STR Mouser Part No 849-LCA110STR 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	9,047In Stock 4,000Expected 09/08/2027	Cut Tape €3.50 €3.12 €2.98 €2.87 Reel €2.41 View €2.77 €2.65 €2.55 €2.38 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127STR IXYS Integrated Circuits 1: €5.95 1,404In Stock End of Life	Mfr. Part No. LCA127STR Mouser Part No 849-LCA127STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,404In Stock	Cut Tape €5.95 €5.31 €5.07 €4.89 Reel €4.18 View €4.73 €4.50 €4.34 €4.06 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 8-Pin Power SOIC CPC1966B IXYS Integrated Circuits 1: €8.45 1,905In Stock 1,725Expected 22/01/2027	Mfr. Part No. CPC1966B Mouser Part No 849-CPC1966B	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8-Pin Power SOIC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,905In Stock 1,725Expected 22/01/2027	€8.45 €7.53 €7.18 €6.93 View €6.68 €6.25 €6.12 €5.97	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		SCR
Solid State Relays - PCB Mount AC Switch 3A, 600V CPC1966Y IXYS Integrated Circuits 1: €7.40 394In Stock 7,650Expected 23/11/2026	Mfr. Part No. CPC1966Y Mouser Part No 849-CPC1966Y	IXYS Integrated Circuits	Solid State Relays - PCB Mount AC Switch 3A, 600V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	394In Stock 7,650Expected 23/11/2026	€7.40 €6.59 €6.10 €5.91 €5.67	Min.: 1 Mult.: 1	PCB Mount	SIP-4		SCR
Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay CPC1976Y IXYS Integrated Circuits 1: €6.65 2,696In Stock 4,175On Order	Mfr. Part No. CPC1976Y Mouser Part No 849-CPC1976Y	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,696In Stock 4,175On Order On Order Ship Dates Mfr. No: CPC1976Y Stock: 2,696 Can Dispatch Immediately On Order: 75 Expected 04/11/2026 4,100 Expected 08/01/2027 Factory Lead Time: 23 Weeks	€6.65 €5.47 €4.76 €4.47	Min.: 1 Mult.: 1	Through Hole	SIP-4	1 Channel	PhotoSCR
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA712S IXYS Integrated Circuits 1: €9.55 283In Stock	Mfr. Part No. LCA712S Mouser Part No 849-LCA712S	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	283In Stock	€9.55 €8.51 €8.13 €7.84 View €7.53 €7.20 €6.95 €6.52 Quote	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715 IXYS Integrated Circuits 1: €10.31 833In Stock	Mfr. Part No. LCA715 Mouser Part No 849-LCA715	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	833In Stock	€10.31 €9.18 €8.74 €8.35 View €8.01 €7.65 €7.39 €7.13 Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-6		MOSFET