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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 (IDR) Filter the results in the table by unit price based on your quantity.	Qty.
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R CPC1593GSTR IXYS Integrated Circuits 1: Rp114.295,58 1.742Expected 04/11/2027 End of Life	Mfr. Part No. CPC1593GSTR Mouser Part No 849-CPC1593GSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1.742Expected 04/11/2027	Cut Tape Rp114.295,58 Rp101.820,30 Rp97.233,80 Rp93.931,52 Reel Rp81.823,16 View Rp90.812,70 Rp86.409,66 Rp84.575,06 Rp81.456,24 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1779J IXYS Integrated Circuits 1: Rp505.248,84 100On Order End of Life	Mfr. Part No. CPC1779J Mouser Part No 849-CPC1779J 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	100On Order	Rp505.248,84 Rp455.714,64 Rp433.332,52 Rp414.986,52	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 4PIN SIP CPC1906Y IXYS Integrated Circuits 1: Rp229.508,46 291Expected 23/07/2027 End of Life	Mfr. Part No. CPC1906Y Mouser Part No 849-CPC1906Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	291Expected 23/07/2027	Rp229.508,46 Rp204.557,90 Rp194.834,52 Rp188.596,88 View Rp181.808,86 Rp159.059,82	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch CPC1943GS IXYS Integrated Circuits 1: Rp250.055,98 250Expected 14/12/2026 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 14/12/2026	Rp250.055,98 Rp195.384,90 Rp174.837,38 Rp168.783,20	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A CPC2907B IXYS Integrated Circuits 1: Rp384.348,70 785On Order End of Life	Mfr. Part No. CPC2907B Mouser Part No 849-CPC2907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	785On Order On Order Ship Dates Mfr. No: CPC2907B Stock: 0 On Order: 435 Expected 09/11/2026 350 Expected 13/11/2026 Factory Lead Time: 39 Weeks	Rp384.348,70 Rp341.969,44 Rp314.083,52 Rp303.442,84 Rp292.985,62	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110LSTR IXYS Integrated Circuits 1: Rp80.172,02 2.000Expected 08/02/2027 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 08/02/2027	Cut Tape Rp80.172,02 Rp73.200,54 Rp67.513,28 Rp64.761,38 View Reel Rp55.588,38 Rp62.559,86 Rp59.624,50 Rp57.606,44 Rp55.588,38 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182S IXYS Integrated Circuits 1: Rp99.068,40 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	Rp99.068,40 Rp89.345,02 Rp82.557,00 Rp78.337,42 View Rp74.301,30 Rp70.999,02 Rp65.495,22	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMD PLA140S IXYS Integrated Circuits 1: Rp173.553,16 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	Rp173.553,16 Rp159.426,74 Rp146.951,46 Rp140.897,28 View Rp135.393,48 Rp129.339,30	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225N IXYS Integrated Circuits 1: Rp69.347,88 326Expected 13/01/2027 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	326Expected 13/01/2027	Rp69.347,88 Rp64.944,84 Rp57.789,90 Rp54.854,54 View Rp53.203,40 Rp50.818,42 Rp49.167,28	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V Single Pole SIP Power Relay CPC1926Y IXYS Integrated Circuits 1: Rp207.309,80 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	Rp207.309,80 Rp189.697,64 Rp170.801,26 Rp163.829,78 View Rp156.674,84 Rp149.519,90	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST i4-PAC 600V CPC1977J IXYS Integrated Circuits 1: Rp417.738,42 8Expected 25/01/2027 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 25/01/2027	Rp417.738,42 Rp373.157,64 Rp356.095,86 Rp343.070,20 View Rp330.961,84 Rp292.985,62 Rp287.298,36 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110LS IXYS Integrated Circuits 1: Rp85.492,36 249Expected 30/06/2027 End of Life	Mfr. Part No. LCA110LS Mouser Part No 849-LCA110LS 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	249Expected 30/06/2027	Rp85.492,36 Rp80.172,02 Rp71.182,48 Rp63.110,24 View Rp60.541,80 Rp56.322,22 Rp55.038,00 Rp54.120,70 Rp53.753,78	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120L IXYS Integrated Circuits 1: Rp113.928,66 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part No. LCA120L Mouser Part No 849-LCA120L End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Rp113.928,66 Rp113.194,82 Rp100.719,54 Rp95.399,20 View Rp90.078,86 Rp88.244,26 Rp86.960,04 Rp85.492,36 Rp85.125,44	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710RTR IXYS Integrated Circuits 1.000: Rp118.515,16 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 Rp118.515,16	Min.: 1.000 Mult.: 1.000 : 1.000
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP OAA160 IXYS Integrated Circuits 1: Rp223.087,36 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	Rp223.087,36 Rp198.687,18 Rp189.881,10 Rp183.276,54 View Rp177.038,90 Rp168.966,66	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR OAA160STR IXYS Integrated Circuits 1: Rp214.831,66 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 Rp214.831,66 Rp191.532,24 Rp182.909,62 Rp176.671,98 Reel Rp151.904,88 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: Rp82.923,92 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 Rp82.923,92	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: Rp240.516,06 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	Rp240.516,06	Min.: 100 Mult.: 50
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LS IXYS Integrated Circuits 1: Rp253.725,18 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	Rp253.725,18 Rp237.213,78 Rp226.206,18 Rp214.281,28 Rp190.981,86	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 400V 150mA SSR PAA110LSTR IXYS Integrated Circuits 1.000: Rp175.571,22 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 Rp175.571,22	Min.: 1.000 Mult.: 1.000 : 1.000
Solid State Relays - PCB Mount DUAL POLE CIRCUITS PAA127 IXYS Integrated Circuits 1: Rp135.393,48 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	Rp135.393,48 Rp126.954,32 Rp112.827,90 Rp107.140,64 View Rp101.453,38 Rp95.215,74 Rp91.913,46 Rp88.794,64	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual Single-Pole 1-Form-A, 280V,200mA PAA127STR IXYS Integrated Circuits 1.000: Rp84.941,98 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 Rp84.941,98	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: Rp220.335,46 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	Rp220.335,46	Min.: 100 Mult.: 50
Solid State Relays - PCB Mount Single Pole Dual 1-Form-A Relay PAA140LSTR IXYS Integrated Circuits 1.000: Rp191.532,24 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 Rp191.532,24	Min.: 1.000 Mult.: 1.000 : 1.000
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA190 IXYS Integrated Circuits 100: Rp192.633,00 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	Rp192.633,00	Min.: 100 Mult.: 50