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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 350V 170mA Dual Single-Pole LAA125LS IXYS Integrated Circuits 1: Rp194.651,06 83In Stock End of Life	Mfr. Part No. LAA125LS Mouser Part No 849-LAA125LS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	83In Stock	Rp194.651,06 Rp182.359,24 Rp162.178,64 Rp153.922,94 View Rp145.850,70 Rp133.558,88 Rp128.972,38 Rp124.569,34	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127LS IXYS Integrated Circuits 1: Rp230.425,76 90In Stock End of Life	Mfr. Part No. LAA127LS Mouser Part No 849-LAA127LS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	90In Stock	Rp230.425,76 Rp204.741,36 Rp194.651,06 Rp184.377,30 View Rp175.387,76 Rp167.498,98 Rp161.811,72 Rp156.124,46	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127STR IXYS Integrated Circuits 1: Rp212.079,76 442In Stock End of Life	Mfr. Part No. LAA127STR Mouser Part No 849-LAA127STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	442In Stock	Cut Tape Rp212.079,76 Rp188.963,80 Rp180.524,64 Rp174.287,00 View Reel Rp148.786,06 Rp167.315,52 Rp159.610,20 Rp154.289,86 Rp148.786,06 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA120 IXYS Integrated Circuits 1: Rp120.533,22 1.119In Stock End of Life	Mfr. Part No. LCA120 Mouser Part No 849-LCA120 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1.119In Stock	Rp120.533,22 Rp113.011,36 Rp100.536,08 Rp95.399,20 View Rp90.445,78 Rp85.675,82 Rp82.740,46 Rp79.988,56	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120L IXYS Integrated Circuits 1: Rp113.928,66 85In Stock 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	85In Stock	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 Relay 250V 170mA LCA120LS IXYS Integrated Circuits 1: Rp121.817,44 84In Stock End of Life	Mfr. Part No. LCA120LS Mouser Part No 849-LCA120LS 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	84In Stock	Rp121.817,44 Rp114.295,58 Rp101.636,84 Rp96.316,50 View Rp84.024,68 Rp82.190,08 Rp80.355,48 Rp78.887,80 Rp78.520,88	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMT LCA120S IXYS Integrated Circuits 1: Rp114.845,96 53In Stock End of Life	Mfr. Part No. LCA120S Mouser Part No 849-LCA120S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN SMT Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	53In Stock	Rp114.845,96 Rp102.370,68 Rp97.784,18 Rp94.298,44 View Rp86.042,74 Rp84.391,60 Rp82.923,92 Rp81.456,24 Rp81.089,32	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120STR IXYS Integrated Circuits 1: Rp110.626,38 1.433In Stock 2.000Expected 04/08/2027 End of Life	Mfr. Part No. LCA120STR Mouser Part No 849-LCA120STR 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	1.433In Stock 2.000Expected 04/08/2027	Cut Tape Rp110.626,38 Rp98.701,48 Rp94.298,44 Rp90.996,16 Reel Rp77.787,04 View Rp87.877,34 Rp83.657,76 Rp80.722,40 Rp75.402,06 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127 IXYS Integrated Circuits 1: Rp130.990,44 1.921In Stock End of Life	Mfr. Part No. LCA127 Mouser Part No 849-LCA127 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	1.921In Stock	Rp130.990,44 Rp116.680,56 Rp111.543,68 Rp107.507,56 View Rp103.838,36 Rp98.701,48 Rp95.399,20 Rp92.096,92	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127S IXYS Integrated Circuits 1: Rp142.181,50 93In Stock End of Life	Mfr. Part No. LCA127S Mouser Part No 849-LCA127S 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	93In Stock	Rp142.181,50 Rp133.375,42 Rp118.515,16 Rp112.460,98 View Rp106.590,26 Rp99.985,70 Rp96.499,96 Rp93.197,68	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA182 IXYS Integrated Circuits 1: Rp93.564,60 150In Stock End of Life	Mfr. Part No. LCA182 Mouser Part No 849-LCA182 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	150In Stock	Rp93.564,60 Rp83.474,30 Rp79.805,10 Rp75.768,98 View Rp72.650,16 Rp69.347,88 Rp65.862,14 Rp63.844,08	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182STR IXYS Integrated Circuits 1: Rp91.363,08 3.383In Stock End of Life	Mfr. Part No. LCA182STR Mouser Part No 849-LCA182STR 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	3.383In Stock	Cut Tape Rp91.363,08 Rp81.456,24 Rp77.787,04 Rp75.218,60 Reel Rp64.211,00 View Rp72.283,24 Rp68.980,96 Rp66.595,98 Rp62.192,94 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA710 IXYS Integrated Circuits 1: Rp182.726,16 23In Stock 10.050On Order	Mfr. Part No. LCA710 Mouser Part No 849-LCA710	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	23In Stock 10.050On Order On Order Ship Dates Mfr. No: LCA710 Stock: 23 Can Dispatch Immediately On Order: 5.150 Expected 02/11/2026 4.900 Expected 02/08/2027 Factory Lead Time: 35 Weeks	Rp182.726,16 Rp171.718,56 Rp153.922,94 Rp146.401,08 View Rp140.897,28 Rp134.476,18	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717 IXYS Integrated Circuits 1: Rp183.276,54 201In Stock 300Expected 02/11/2026	Mfr. Part No. LCA717 Mouser Part No 849-LCA717	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	201In Stock 300Expected 02/11/2026	Rp183.276,54 Rp163.279,40 Rp155.941,00 Rp150.437,20 View Rp145.300,32 Rp133.375,42 Rp129.522,76 Rp126.770,86 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160S IXYS Integrated Circuits 1: Rp122.918,20 72In Stock	Mfr. Part No. OMA160S Mouser Part No 849-OMA160S	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	72In Stock	Rp122.918,20 Rp109.525,62 Rp109.158,70 Rp103.471,44 View Rp96.316,50 Rp94.114,98 Rp91.913,46 Rp88.794,64	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP PAA193 IXYS Integrated Circuits 1: Rp200.705,24 91In Stock	Mfr. Part No. PAA193 Mouser Part No 849-PAA193	IXYS Integrated Circuits	Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	91In Stock	Rp200.705,24 Rp178.873,50 Rp170.801,26 Rp164.930,54 View Rp159.243,28 Rp151.721,42 Rp138.695,76 Rp136.494,24	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 600V 100mA SSR PAA193S IXYS Integrated Circuits 1: Rp200.705,24 153In Stock 50Expected 07/01/2027	Mfr. Part No. PAA193S Mouser Part No 849-PAA193S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 600V 100mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	153In Stock 50Expected 07/01/2027	Rp200.705,24 Rp178.873,50 Rp170.801,26 Rp164.930,54 View Rp159.243,28 Rp147.134,92 Rp144.566,48 Rp141.998,04 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110L IXYS Integrated Circuits 1: Rp141.814,58 61In Stock	Mfr. Part No. PLA110L Mouser Part No 849-PLA110L	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	61In Stock	Rp141.814,58 Rp126.403,94 Rp120.716,68 Rp116.497,10 View Rp112.460,98 Rp102.003,76 Rp100.719,54 Rp99.618,78 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA110S IXYS Integrated Circuits 1: Rp148.969,52 45In Stock 250Expected 26/02/2027	Mfr. Part No. PLA110S Mouser Part No 849-PLA110S	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	45In Stock 250Expected 26/02/2027	Rp148.969,52 Rp139.613,06 Rp124.202,42 Rp117.964,78 View Rp111.727,14 Rp104.205,28 Rp100.719,54 Rp97.233,80	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132 IXYS Integrated Circuits 1: Rp172.452,40 113In Stock	Mfr. Part No. PLA132 Mouser Part No 849-PLA132	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	113In Stock	Rp172.452,40 Rp153.739,48 Rp146.768,00 Rp141.631,12 View Rp140.713,82 Rp129.155,84 Rp126.770,86 Rp125.486,64 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132S IXYS Integrated Circuits 1: Rp172.452,40 66In Stock	Mfr. Part No. PLA132S Mouser Part No 849-PLA132S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	66In Stock	Rp172.452,40 Rp153.739,48 Rp146.768,00 Rp141.631,12 View Rp136.677,70 Rp129.706,22 Rp119.615,92 Rp118.331,70 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140L IXYS Integrated Circuits 1: Rp174.470,46 38In Stock 100Expected 03/06/2027	Mfr. Part No. PLA140L Mouser Part No 849-PLA140L	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	38In Stock 100Expected 03/06/2027	Rp174.470,46 Rp155.390,62 Rp148.419,14 Rp143.282,26 View Rp135.943,86 Rp132.274,66 Rp130.256,60 Rp128.422,00 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170 IXYS Integrated Circuits 1: Rp130.623,52 10In Stock 400Expected 01/03/2027	Mfr. Part No. PLA170 Mouser Part No 849-PLA170	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	10In Stock 400Expected 01/03/2027	Rp130.623,52 Rp119.432,46 Rp109.158,70 Rp103.471,44 View Rp98.151,10 Rp88.611,18	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170S IXYS Integrated Circuits 1: Rp130.990,44 15In Stock 1.250Expected 07/12/2026	Mfr. Part No. PLA170S Mouser Part No 849-PLA170S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	15In Stock 1.250Expected 07/12/2026	Rp130.990,44 Rp122.734,74 Rp104.939,12 Rp101.086,46 View Rp97.600,72 Rp93.197,68	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA171PTR IXYS Integrated Circuits 1: Rp138.328,84 132In Stock 1.000Expected 28/06/2027	Mfr. Part No. PLA171PTR Mouser Part No 849-PLA171PTR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	132In Stock 1.000Expected 28/06/2027	Cut Tape Rp138.328,84 Rp126.403,94 Rp117.230,94 Rp113.194,82 View Reel Rp93.197,68 Rp109.342,16 Rp100.719,54 Rp97.233,80 Rp93.197,68 MouseReel Available	Min.: 1 Mult.: 1 : 1.000