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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 (KRW) Filter the results in the table by unit price based on your quantity.	Qty.
Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch CPC1943GS IXYS Integrated Circuits 1: ₩22,557.6 250Expected 11/30/2026 End of Life	Mfr. Part # CPC1943GS Mouser Part # 849-CPC1943GS End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	250Expected 11/30/2026	₩22,557.6 ₩17,487.6 ₩14,508 ₩13,228.8	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110LSTR IXYS Integrated Circuits 1: ₩6,910.8 2,000Expected 1/14/2027 End of Life	Mfr. Part # LCA110LSTR Mouser Part # 849-LCA110LSTR 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	2,000Expected 1/14/2027	Cut Tape ₩6,910.8 ₩6,474 ₩5,756.4 ₩5,460 View Reel ₩4,680 ₩5,257.2 ₩5,007.6 ₩4,836 ₩4,680 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182S IXYS Integrated Circuits 1: ₩8,424 499On Order End of Life	Mfr. Part # LCA182S Mouser Part # 849-LCA182S 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	499On Order On Order Ship Dates Mfr. #: LCA182S Stock: 0 On Order: 249 Expected 5/19/2027 250 Expected 6/9/2027 Factory Lead-Time: 36 Weeks	₩8,424 ₩7,597.2 ₩7,020 ₩6,661.2 View ₩6,318 ₩6,037.2 ₩5,569.2	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMD PLA140S IXYS Integrated Circuits 1: ₩14,757.6 200Expected 3/15/2027	Mfr. Part # PLA140S Mouser Part # 849-PLA140S	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN SMD Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	200Expected 3/15/2027	₩14,757.6 ₩13,556.4 ₩12,495.6 ₩11,980.8 View ₩11,512.8 ₩10,998	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225N IXYS Integrated Circuits 1: ₩5,896.8 501Expected 2/19/2027 End of Life	Mfr. Part # CPC1225N Mouser Part # 849-CPC1225N 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	501Expected 2/19/2027	₩5,896.8 ₩5,522.4 ₩4,914 ₩4,664.4 View ₩4,524 ₩4,321.2 ₩4,180.8	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay CPC1926Y IXYS Integrated Circuits 1: ₩17,628 188Expected 11/23/2026 End of Life	Mfr. Part # CPC1926Y Mouser Part # 849-CPC1926Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	188Expected 11/23/2026	₩17,628 ₩16,130.4 ₩14,523.6 ₩13,930.8 View ₩13,322.4 ₩12,714	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST i4-PAC 600V CPC1977J IXYS Integrated Circuits 1: ₩35,396.4 8Expected 2/19/2027 End of Life	Mfr. Part # CPC1977J Mouser Part # 849-CPC1977J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST i4-PAC 600V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	8Expected 2/19/2027	₩35,396.4 ₩32,541.6 ₩30,825.6 ₩29,109.6 View ₩28,064.4 ₩26,800.8 ₩25,864.8	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay CPC1983B IXYS Integrated Circuits 1: ₩16,380 50In Stock 100Expected 10/30/2026 End of Life	Mfr. Part # CPC1983B Mouser Part # 849-CPC1983B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	50In Stock 100Expected 10/30/2026	₩16,380 ₩14,601.6 ₩13,930.8 ₩13,447.2 View ₩12,121.2 ₩11,887.2 ₩11,668.8 ₩11,559.6	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225NTR IXYS Integrated Circuits 1: ₩5,506.8 Lead-Time 36 Weeks End of Life	Mfr. Part # CPC1225NTR Mouser Part # 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	Lead-Time 36 Weeks	Cut Tape ₩5,506.8 ₩4,914 ₩4,695.6 ₩4,477.2 View Reel ₩3,759.6 ₩4,336.8 ₩4,180.8 ₩4,040.4 ₩3,900 ₩3,759.6 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710RTR IXYS Integrated Circuits 1,000: ₩10,077.6 Non-Stocked Lead-Time 35 Weeks	Mfr. Part # LCA710RTR Mouser Part # 849-LCA710RTR	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	Non-Stocked Lead-Time 35 Weeks	Reel ₩10,077.6	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP OAA160 IXYS Integrated Circuits 1: ₩18,969.6 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # OAA160 Mouser Part # 849-OAA160	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	Non-Stocked Lead-Time 36 Weeks	₩18,969.6 ₩16,894.8 ₩16,146 ₩15,568.8 View ₩15,022.8 ₩13,088.4	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR OAA160STR IXYS Integrated Circuits 1: ₩18,267.6 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # OAA160STR Mouser Part # 849-OAA160STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Cut Tape ₩18,267.6 ₩16,286.4 ₩15,553.2 ₩15,022.8 Reel ₩12,916.8 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160STR IXYS Integrated Circuits 1,000: ₩7,051.2 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # OMA160STR Mouser Part # 849-OMA160STR	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	Non-Stocked Lead-Time 36 Weeks	Reel ₩7,051.2	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110L IXYS Integrated Circuits 100: ₩20,451.6 Non-Stocked Lead-Time 35 Weeks	Mfr. Part # PAA110L Mouser Part # 849-PAA110L	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	Non-Stocked Lead-Time 35 Weeks	₩20,451.6	Min.: 100 Mult.: 50
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LS IXYS Integrated Circuits 1: ₩21,574.8 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA110LS Mouser Part # 849-PAA110LS	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	Non-Stocked Lead-Time 36 Weeks	₩21,574.8 ₩20,170.8 ₩19,234.8 ₩18,220.8 ₩16,239.6	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LSTR IXYS Integrated Circuits 1,000: ₩14,929.2 Non-Stocked Lead-Time 35 Weeks	Mfr. Part # PAA110LSTR Mouser Part # 849-PAA110LSTR	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	Non-Stocked Lead-Time 35 Weeks	Reel ₩14,929.2	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount DUAL POLE CIRCUITS PAA127 IXYS Integrated Circuits 1: ₩11,512.8 Non-Stocked	Mfr. Part # PAA127 Mouser Part # 849-PAA127	IXYS Integrated Circuits	Solid State Relays - PCB Mount DUAL POLE CIRCUITS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked	₩11,512.8 ₩10,795.2 ₩9,594 ₩9,110.4 View ₩8,626.8 ₩8,096.4 ₩7,815.6 ₩7,550.4	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual Single-Pole 1-Form-A, 280V,200mA PAA127STR IXYS Integrated Circuits 1,000: ₩7,222.8 Non-Stocked	Mfr. Part # PAA127STR Mouser Part # 849-PAA127STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual Single-Pole 1-Form-A, 280V,200mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked	Reel ₩7,222.8	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140L IXYS Integrated Circuits 100: ₩18,782.4 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA140L Mouser Part # 849-PAA140L	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	Non-Stocked Lead-Time 36 Weeks	₩18,782.4	Min.: 100 Mult.: 50
Solid State Relays - PCB Mount Single Pole Dual 1-Form-A Relay PAA140LSTR IXYS Integrated Circuits 1,000: ₩16,114.8 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA140LSTR Mouser Part # 849-PAA140LSTR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole Dual 1-Form-A Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Reel ₩16,114.8	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150STR IXYS Integrated Circuits 1: ₩20,685.6 Lead-Time 36 Weeks	Mfr. Part # PAA150STR Mouser Part # 849-PAA150STR	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	Lead-Time 36 Weeks	Cut Tape ₩20,685.6 ₩18,439.2 ₩17,612.4 ₩17,004 ₩16,426.8 Reel ₩14,617.2 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA190 IXYS Integrated Circuits 100: ₩16,380 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA190 Mouser Part # 849-PAA190	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	Non-Stocked Lead-Time 36 Weeks	₩16,380	Min.: 100 Mult.: 50
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA190S IXYS Integrated Circuits 100: ₩16,380 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA190S Mouser Part # 849-PAA190S	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	Non-Stocked Lead-Time 36 Weeks	₩16,380	Min.: 100 Mult.: 50
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA190STR IXYS Integrated Circuits 1,000: ₩14,008.8 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA190STR Mouser Part # 849-PAA190STR	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	Non-Stocked Lead-Time 36 Weeks	Reel ₩14,008.8	Min.: 1,000 Mult.: 1,000 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA191STR IXYS Integrated Circuits 1: ₩22,822.8 Non-Stocked Lead-Time 36 Weeks	Mfr. Part # PAA191STR Mouser Part # 849-PAA191STR	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	Non-Stocked Lead-Time 36 Weeks	Cut Tape ₩22,822.8 ₩20,295.6 ₩19,281.6 ₩18,267.6 View Reel ₩15,475.2 ₩17,238 ₩16,395.6 ₩15,834 ₩15,475.2 MouseReel Available	Min.: 1 Mult.: 1 : 1,000