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 (DKK) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Output Type
Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch CPC1943GS IXYS Integrated Circuits 1: 92,80 kr. 250Expected 30/11/2026 End of Life	Mfr. Part No. CPC1943GS Mouser Part No 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 30/11/2026	92,80 kr. 71,91 kr. 59,68 kr. 54,38 kr.	Min.: 1 Mult.: 1	SMD/SMT	SMD-DIP-6
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110LSTR IXYS Integrated Circuits 1: 28,42 kr. 2.000Expected 14/01/2027 End of Life	Mfr. Part No. LCA110LSTR Mouser Part No 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 14/01/2027	Cut Tape 28,42 kr. 26,63 kr. 23,65 kr. 22,45 kr. View Reel 19,32 kr. 21,63 kr. 20,59 kr. 19,92 kr. 19,32 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182S IXYS Integrated Circuits 1: 34,61 kr. 499On Order End of Life	Mfr. Part No. LCA182S Mouser Part No 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. No: LCA182S Stock: 0 On Order: 249 Expected 19/05/2027 250 Expected 09/06/2027 Factory Lead Time: 36 Weeks	34,61 kr. 31,26 kr. 28,87 kr. 27,38 kr. View 25,96 kr. 24,84 kr. 22,90 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN SMD PLA140S IXYS Integrated Circuits 1: 60,72 kr. 200Expected 15/03/2027	Mfr. Part No. PLA140S Mouser Part No 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 15/03/2027	60,72 kr. 55,73 kr. 51,40 kr. 49,24 kr. View 47,37 kr. 45,36 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225N IXYS Integrated Circuits 1: 24,25 kr. 501Expected 19/02/2027 End of Life	Mfr. Part No. CPC1225N Mouser Part No 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 19/02/2027	24,25 kr. 22,68 kr. 20,22 kr. 19,17 kr. View 18,58 kr. 17,75 kr. 17,16 kr.	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay CPC1926Y IXYS Integrated Circuits 1: 72,51 kr. 188Expected 23/11/2026 End of Life	Mfr. Part No. CPC1926Y Mouser Part No 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 23/11/2026	72,51 kr. 66,32 kr. 59,75 kr. 57,29 kr. 54,98 kr.	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount SPST i4-PAC 600V CPC1977J IXYS Integrated Circuits 1: 145,54 kr. 8Expected 19/02/2027 End of Life	Mfr. Part No. CPC1977J Mouser Part No 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 19/02/2027	145,54 kr. 133,83 kr. 126,75 kr. 119,73 kr. View 115,41 kr. 110,18 kr. 106,38 kr.	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay CPC1983B IXYS Integrated Circuits 1: 67,36 kr. 50In Stock 100Expected 30/10/2026 End of Life	Mfr. Part No. CPC1983B Mouser Part No 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 30/10/2026	67,36 kr. 60,05 kr. 57,29 kr. 55,28 kr. View 49,83 kr. 48,86 kr. 47,97 kr. 47,52 kr.	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225NTR IXYS Integrated Circuits 1: 22,68 kr. Lead-Time 36 Weeks 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	Lead-Time 36 Weeks	Cut Tape 22,68 kr. 20,22 kr. 19,32 kr. 18,43 kr. View Reel 15,44 kr. 17,83 kr. 17,16 kr. 16,64 kr. 16,04 kr. 15,44 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710RTR IXYS Integrated Circuits 1.000: 41,48 kr. Non-Stocked Lead-Time 35 Weeks	Mfr. Part No. LCA710RTR Mouser Part No 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 41,48 kr.	Min.: 1.000 Mult.: 1.000 : 1.000	PCB Mount		MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP OAA160 IXYS Integrated Circuits 1: 78,03 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. OAA160 Mouser Part No 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	78,03 kr. 69,45 kr. 66,39 kr. 64,01 kr. View 61,77 kr. 53,86 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR OAA160STR IXYS Integrated Circuits 1: 75,12 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. OAA160STR Mouser Part No 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 75,12 kr. 66,99 kr. 63,93 kr. 61,77 kr. Reel 53,12 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160STR IXYS Integrated Circuits 1.000: 29,09 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. OMA160STR Mouser Part No 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 29,09 kr.	Min.: 1.000 Mult.: 1.000 : 1.000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110L IXYS Integrated Circuits 100: 84,07 kr. Non-Stocked Lead-Time 35 Weeks	Mfr. Part No. PAA110L Mouser Part No 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	84,07 kr.	Min.: 100 Mult.: 50	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LS IXYS Integrated Circuits 1: 88,70 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA110LS Mouser Part No 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	88,70 kr. 82,96 kr. 79,08 kr. 74,90 kr. 66,77 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LSTR IXYS Integrated Circuits 1.000: 61,40 kr. Non-Stocked Lead-Time 35 Weeks	Mfr. Part No. PAA110LSTR Mouser Part No 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 61,40 kr.	Min.: 1.000 Mult.: 1.000 : 1.000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DUAL POLE CIRCUITS PAA127 IXYS Integrated Circuits 1: 47,37 kr. Non-Stocked	Mfr. Part No. PAA127 Mouser Part No 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	47,37 kr. 44,39 kr. 39,46 kr. 37,45 kr. View 35,51 kr. 33,27 kr. 32,15 kr. 31,03 kr.	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Solid State Relays - PCB Mount Dual Single-Pole 1-Form-A, 280V,200mA PAA127STR IXYS Integrated Circuits 1.000: 29,69 kr. Non-Stocked	Mfr. Part No. PAA127STR Mouser Part No 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 29,69 kr.	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: 77,21 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA140L Mouser Part No 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	77,21 kr.	Min.: 100 Mult.: 50	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Single Pole Dual 1-Form-A Relay PAA140LSTR IXYS Integrated Circuits 1.000: 66,24 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA140LSTR Mouser Part No 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 66,24 kr.	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: 85,04 kr. Lead-Time 36 Weeks	Mfr. Part No. PAA150STR Mouser Part No 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 85,04 kr. 75,87 kr. 72,44 kr. 69,90 kr. 67,59 kr. Reel 60,13 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA190 IXYS Integrated Circuits 100: 67,36 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA190 Mouser Part No 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	67,36 kr.	Min.: 100 Mult.: 50	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA190S IXYS Integrated Circuits 100: 67,36 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA190S Mouser Part No 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	67,36 kr.	Min.: 100 Mult.: 50	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA190STR IXYS Integrated Circuits 1.000: 57,59 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA190STR Mouser Part No 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 57,59 kr.	Min.: 1.000 Mult.: 1.000 : 1.000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA191STR IXYS Integrated Circuits 1: 93,85 kr. Non-Stocked Lead-Time 36 Weeks	Mfr. Part No. PAA191STR Mouser Part No 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 93,85 kr. 83,48 kr. 79,30 kr. 75,12 kr. View Reel 63,63 kr. 70,87 kr. 67,44 kr. 65,13 kr. 63,63 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-8	MOSFET

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

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