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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.
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
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA120 IXYS Integrated Circuits 1: ¥1,091.3 2,469In Stock End of Life	Mfr. Part # LCA120 Mouser Part # 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	2,469In Stock	¥1,091.3 ¥1,023.2 ¥910.2 ¥863.7 View ¥818.9 ¥775.7 ¥749.1 ¥724.2	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120L IXYS Integrated Circuits 1: ¥1,031.5 85In Stock End of Life	Mfr. Part # LCA120L Mouser Part # 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	¥1,031.5 ¥1,024.8 ¥911.9 ¥863.7 View ¥797.3 ¥775.7 ¥750.8 ¥740.8 ¥739.1	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120LS IXYS Integrated Circuits 1: ¥1,102.9 84In Stock End of Life	Mfr. Part # LCA120LS Mouser Part # 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	¥1,102.9 ¥1,034.8 ¥920.2 ¥872 View ¥760.7 ¥744.1 ¥727.5 ¥714.2 ¥710.9	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMT LCA120S IXYS Integrated Circuits 1: ¥1,039.8 53In Stock End of Life	Mfr. Part # LCA120S Mouser Part # 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	¥1,039.8 ¥926.8 ¥885.3 ¥853.8 View ¥760.7 ¥749.1 ¥737.5 ¥727.5 ¥725.9	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120STR IXYS Integrated Circuits 1: ¥1,059.7 1,433In Stock 2,000Expected 8/4/2027 End of Life	Mfr. Part # LCA120STR Mouser Part # 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 8/4/2027	Cut Tape ¥1,059.7 ¥993.3 ¥882 ¥838.8 View Reel ¥702.6 ¥794 ¥754.1 ¥727.5 ¥702.6 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127 IXYS Integrated Circuits 1: ¥1,267.3 1,921In Stock End of Life	Mfr. Part # LCA127 Mouser Part # 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	¥1,267.3 ¥1,187.6 ¥1,054.7 ¥1,003.2 View ¥950.1 ¥890.3 ¥860.4 ¥830.5	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127S IXYS Integrated Circuits 1: ¥1,287.3 93In Stock End of Life	Mfr. Part # LCA127S Mouser Part # 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	¥1,287.3 ¥1,207.5 ¥1,073 ¥1,018.2 View ¥965 ¥905.2 ¥873.7 ¥843.8	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA182 IXYS Integrated Circuits 1: ¥887 150In Stock End of Life	Mfr. Part # LCA182 Mouser Part # 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	¥887 ¥832.2 ¥739.1 ¥710.9 View ¥686 ¥616.2 ¥596.3 ¥578	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182STR IXYS Integrated Circuits 1: ¥863.7 3,383In Stock End of Life	Mfr. Part # LCA182STR Mouser Part # 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 ¥863.7 ¥808.9 ¥719.2 ¥682.7 View Reel ¥578 ¥649.5 ¥619.6 ¥598 ¥578 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA710 IXYS Integrated Circuits 1: ¥1,659.3 23In Stock 10,050On Order	Mfr. Part # LCA710 Mouser Part # 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. #: LCA710 Stock: 23 Can Ship Immediately On Order: 5,150 Expected 11/2/2026 4,900 Expected 2/10/2027 Factory Lead-Time: 35 Weeks	¥1,659.3 ¥1,561.3 ¥1,398.6 ¥1,347.1 View ¥1,300.6 ¥1,242.4	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717 IXYS Integrated Circuits 1: ¥1,659.3 201In Stock 300Expected 11/2/2026	Mfr. Part # LCA717 Mouser Part # 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 11/2/2026	¥1,659.3 ¥1,478.3 ¥1,411.9 ¥1,362 View ¥1,315.5 ¥1,207.5 ¥1,172.7 ¥1,147.8 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160S IXYS Integrated Circuits 1: ¥1,112.9 72In Stock	Mfr. Part # OMA160S Mouser Part # 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	¥1,112.9 ¥991.6 ¥988.3 ¥936.8 View ¥872 ¥852.1 ¥832.2 ¥803.9	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP PAA193 IXYS Integrated Circuits 1: ¥1,998.2 91In Stock	Mfr. Part # PAA193 Mouser Part # 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	¥1,998.2 ¥1,873.6 ¥1,666 ¥1,581.3 View ¥1,498.2 ¥1,370.3 ¥1,323.8 ¥1,277.3	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 600V 100mA SSR PAA193S IXYS Integrated Circuits 1: ¥1,817.1 153In Stock 50Expected 1/7/2027	Mfr. Part # PAA193S Mouser Part # 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 1/7/2027	¥1,817.1 ¥1,619.5 ¥1,546.4 ¥1,493.2 View ¥1,441.7 ¥1,332.1 ¥1,308.9 ¥1,285.6 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110L IXYS Integrated Circuits 1: ¥1,380.3 61In Stock	Mfr. Part # PLA110L Mouser Part # 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	¥1,380.3 ¥1,293.9 ¥1,149.4 ¥1,092.9 View ¥1,034.8 ¥966.7 ¥933.5 ¥900.3	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA110S IXYS Integrated Circuits 1: ¥1,348.7 45In Stock 250Expected 7/5/2027	Mfr. Part # PLA110S Mouser Part # 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 7/5/2027	¥1,348.7 ¥1,264 ¥1,124.5 ¥1,068 View ¥1,011.5 ¥943.4 ¥911.9 ¥880.3	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110STR IXYS Integrated Circuits 1: ¥1,225.8 108In Stock 3,000On Order	Mfr. Part # PLA110STR Mouser Part # 849-PLA110STR	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	108In Stock 3,000On Order On Order Ship Dates Mfr. #: PLA110STR Stock: 108 Can Ship Immediately On Order: 1,000 Expected 1/27/2027 2,000 Expected 3/22/2027 Factory Lead-Time: 36 Weeks	Cut Tape ¥1,225.8 ¥1,200.9 Reel ¥848.8 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132 IXYS Integrated Circuits 1: ¥1,561.3 113In Stock	Mfr. Part # PLA132 Mouser Part # 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	¥1,561.3 ¥1,391.9 ¥1,328.8 ¥1,282.3 View ¥1,274 ¥1,169.3 ¥1,131.1 ¥1,116.2 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132S IXYS Integrated Circuits 1: ¥1,561.3 66In Stock	Mfr. Part # PLA132S Mouser Part # 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	¥1,561.3 ¥1,391.9 ¥1,328.8 ¥1,282.3 View ¥1,237.4 ¥1,174.3 ¥1,083 ¥1,071.3 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140L IXYS Integrated Circuits 1: ¥1,579.6 38In Stock 100Expected 6/3/2027	Mfr. Part # PLA140L Mouser Part # 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 6/3/2027	¥1,579.6 ¥1,406.9 ¥1,343.7 ¥1,297.2 View ¥1,230.8 ¥1,197.6 ¥1,179.3 ¥1,162.7 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170 IXYS Integrated Circuits 1: ¥1,182.6 10In Stock 400Expected 7/29/2027	Mfr. Part # PLA170 Mouser Part # 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 7/29/2027	¥1,182.6 ¥1,081.3 ¥988.3 ¥936.8 View ¥888.6 ¥802.3	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170S IXYS Integrated Circuits 1: ¥1,184.3 15In Stock 1,250On Order	Mfr. Part # PLA170S Mouser Part # 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 1,250On Order On Order Ship Dates Mfr. #: PLA170S Stock: 15 Can Ship Immediately On Order: 700 Expected 11/16/2026 550 Expected 11/23/2026 Factory Lead-Time: 36 Weeks	¥1,184.3 ¥1,109.5 ¥986.6 ¥936.8 View ¥888.6 ¥837.1	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA171PTR IXYS Integrated Circuits 1: ¥1,252.4 132In Stock 1,000Expected 6/28/2027	Mfr. Part # PLA171PTR Mouser Part # 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 6/28/2027	Cut Tape ¥1,252.4 ¥1,144.4 ¥1,061.4 ¥1,024.8 View Reel ¥823.9 ¥990 ¥885.3 ¥853.8 ¥823.9 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA191 IXYS Integrated Circuits 1: ¥1,569.6 24In Stock	Mfr. Part # PLA191 Mouser Part # 849-PLA191	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	24In Stock	¥1,569.6 ¥1,400.2 ¥1,348.7 ¥1,313.9 View ¥1,159.4 ¥1,142.8 ¥1,132.8	Min.: 1 Mult.: 1