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 (JPY) 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 350V 100mA Solid State Relay CPC1035NTR IXYS Integrated Circuits 1: ¥539.8 8,648In 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	8,648In Stock	Cut Tape ¥539.8 ¥493.3 ¥458.4 ¥440.2 View Reel ¥337.2 ¥423.6 ¥406.9 ¥392 ¥378.7 ¥337.2 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390GRTR IXYS Integrated Circuits 1: ¥691 9,676In Stock End of Life	Mfr. Part # CPC1390GRTR Mouser Part # 849-CPC1390GRTR 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	9,676In Stock	Cut Tape ¥691 ¥617.9 ¥589.7 ¥568.1 Reel ¥500 View ¥546.5 ¥521.6 ¥503.3 ¥485 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-4	MOSFET
Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay CPC1988J IXYS Integrated Circuits 1: ¥6,710.4 583In Stock End of Life	Mfr. Part # CPC1988J Mouser Part # 849-CPC1988J 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	583In Stock	¥6,710.4 ¥6,439.7 ¥6,147.4 ¥5,936.4 View ¥5,732.1 ¥5,444.8 Quote	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110STR IXYS Integrated Circuits 1: ¥1,458.4 9,758In 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	9,758In Stock	Cut Tape ¥1,458.4 ¥1,298.9 ¥1,240.8 ¥1,197.6 View Reel ¥803.9 ¥1,156.1 ¥1,096.3 ¥1,058.1 ¥803.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole LAA710S IXYS Integrated Circuits 1: ¥3,212.4 4,928In Stock End of Life	Mfr. Part # LAA710S Mouser Part # 849-LAA710S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4,928In Stock	¥3,212.4 ¥2,861.9 ¥2,734 ¥2,637.7 View ¥2,548 ¥2,420.1 ¥2,325.4 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount SP AC Solid State Power Switch IXYS Integrated Circuits CPC1998J CPC1998J IXYS Integrated Circuits 1: ¥3,612.7 3,155In Stock 7,700Expected 4/15/2027	Mfr. Part # CPC1998J Mouser Part # 849-CPC1998J	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP AC Solid State Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,155In Stock 7,700Expected 4/15/2027	¥3,612.7 ¥3,280.5 ¥3,124.3 ¥2,988.1 View ¥2,886.8 ¥2,762.2 ¥2,692.5	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	SCR
Solid State Relays - PCB Mount SS Relay SP, NO 4-PIN SOP OptoMOS CPC1004N IXYS Integrated Circuits 1: ¥607.9 6,600In Stock 9,000Expected 7/5/2027 End of Life	Mfr. Part # CPC1004N Mouser Part # 849-CPC1004N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SS Relay SP, NO 4-PIN SOP OptoMOS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6,600In Stock 9,000Expected 7/5/2027	¥607.9 ¥543.1 ¥513.2 ¥495 View ¥480 ¥455.1 ¥441.8 ¥426.9	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP CPC1006NTR IXYS Integrated Circuits 1: ¥355.5 30,057In Stock End of Life	Mfr. Part # CPC1006NTR Mouser Part # 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	30,057In Stock	Cut Tape ¥355.5 ¥342.2 ¥325.6 ¥313.9 Reel ¥252.5 View ¥302.3 ¥287.4 ¥279 ¥252.5 ¥242.5 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: ¥649.5 8,979In Stock 10,000Expected 7/6/2027 End of Life	Mfr. Part # CPC1010NTR Mouser Part # 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 10,000Expected 7/6/2027	Cut Tape ¥649.5 ¥578 ¥553.1 ¥529.9 View Reel ¥453.5 ¥511.6 ¥488.3 ¥471.7 ¥455.1 ¥453.5 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: ¥142.8 187,040In Stock 120,000Expected 2/22/2027 End of Life	Mfr. Part # CPC1017N Mouser Part # 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	187,040In Stock 120,000Expected 2/22/2027	¥142.8 ¥127.7 ¥122.9 ¥98.2 View ¥94.3 ¥92.5 ¥88.2	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: ¥649.5 60,697In Stock End of Life	Mfr. Part # CPC1019NTR Mouser Part # 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	60,697In Stock	Cut Tape ¥649.5 ¥578 ¥553.1 ¥531.5 View Reel ¥441.8 ¥513.2 ¥490 ¥473.4 ¥456.8 ¥441.8 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: ¥1,116.2 34,130In Stock End of Life	Mfr. Part # CPC1020N Mouser Part # 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	34,130In Stock	¥1,116.2 ¥996.6 ¥941.8 ¥901.9 View ¥845.4 ¥798.9 ¥734.2	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: ¥1,006.6 101,556In Stock End of Life	Mfr. Part # CPC1020NTR Mouser Part # 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	101,556In Stock	Cut Tape ¥1,006.6 ¥896.9 ¥857.1 ¥827.2 View Reel ¥707.6 ¥798.9 ¥760.7 ¥734.2 ¥717.6 ¥707.6 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: ¥538.2 7,425In Stock 400Expected 12/25/2026 End of Life	Mfr. Part # CPC1025N Mouser Part # 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 12/25/2026	¥538.2 ¥480 ¥456.8 ¥441.8 View ¥423.6 ¥403.6 ¥390.3 ¥377	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025NTR IXYS Integrated Circuits 1: ¥514.9 64,106In Stock End of Life	Mfr. Part # CPC1025NTR Mouser Part # 849-CPC1025NTR 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	64,106In Stock	Cut Tape ¥514.9 ¥458.4 ¥436.8 ¥421.9 Reel ¥332.2 View ¥406.9 ¥388.7 ¥375.4 ¥332.2 ¥330.5 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1230N IXYS Integrated Circuits 1: ¥624.5 1,328In Stock End of Life	Mfr. Part # CPC1230N Mouser Part # 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	1,328In Stock	¥624.5 ¥569.7 ¥523.2 ¥496.6 View ¥480 ¥456.8 ¥443.5 ¥415.3 ¥402	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1708J IXYS Integrated Circuits 1: ¥3,202.4 492In Stock End of Life	Mfr. Part # CPC1708J Mouser Part # 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	¥3,202.4 ¥2,853.6 ¥2,722.4 ¥2,629.4 View ¥2,539.7 ¥2,400.1 ¥2,317.1 Quote	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: ¥1,393.6 572In Stock End of Life	Mfr. Part # CPC1726Y Mouser Part # 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	¥1,393.6 ¥1,305.5 ¥1,161 ¥1,102.9 View ¥1,044.8 ¥975 ¥941.8 ¥908.6	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1727J IXYS Integrated Circuits 1: ¥3,818.6 344In Stock End of Life	Mfr. Part # CPC1727J Mouser Part # 849-CPC1727J 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	344In Stock	¥3,818.6 ¥3,654.2 ¥3,104.4 ¥2,715.7 Quote Quote	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: ¥1,996.5 9,828In Stock 17,625Expected 2/12/2027 End of Life	Mfr. Part # CPC1907B Mouser Part # 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	9,828In Stock 17,625Expected 2/12/2027	¥1,996.5 ¥1,777.3 ¥1,690.9 ¥1,617.8 View ¥1,551.4 ¥1,481.6 ¥1,430.1 ¥1,382 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: ¥7,536 1,146In Stock 150Expected 11/9/2026 End of Life	Mfr. Part # CPC1968J Mouser Part # 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	1,146In Stock 150Expected 11/9/2026	¥7,536 ¥7,054.3 ¥6,408.1	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LSTR IXYS Integrated Circuits 1: ¥1,491.6 698In Stock End of Life	Mfr. Part # LAA110LSTR Mouser Part # 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 ¥1,491.6 ¥1,330.5 ¥1,270.7 ¥1,225.8 Reel ¥1,044.8 View ¥1,184.3 ¥1,121.2 ¥1,083 ¥985 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: ¥727.5 1,116In Stock End of Life	Mfr. Part # LCA110L Mouser Part # 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	¥727.5 ¥677.7 ¥647.8 ¥626.2 View ¥604.6 ¥564.7 ¥539.8 ¥528.2 ¥476.7	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110STR IXYS Integrated Circuits 1: ¥676 8,782In Stock 4,000Expected 8/9/2027 End of Life	Mfr. Part # LCA110STR Mouser Part # 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	8,782In Stock 4,000Expected 8/9/2027	Cut Tape ¥676 ¥602.9 ¥576.4 ¥554.8 Reel ¥465.1 View ¥534.8 ¥511.6 ¥493.3 ¥460.1 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: ¥1,149.4 1,404In Stock End of Life	Mfr. Part # LCA127STR Mouser Part # 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 ¥1,149.4 ¥1,024.8 ¥978.3 ¥945.1 Reel ¥807.2 View ¥913.6 ¥868.7 ¥838.8 ¥784 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET