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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 (PHP) 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: ₱268.71 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	₱268.71 ₱250.31 ₱239.27 ₱231.29 View ₱223.31 ₱208.59 ₱199.39 ₱195.09 ₱176.07	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA120 IXYS Integrated Circuits 1: ₱403.07 2,459In 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	2,459In Stock	₱403.07 ₱377.92 ₱336.20 ₱319.02 View ₱302.46 ₱286.50 ₱276.69 ₱267.49	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120L IXYS Integrated Circuits 1: ₱380.98 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	₱380.98 ₱378.53 ₱336.81 ₱319.02 View ₱301.23 ₱295.09 ₱290.80 ₱285.89 ₱284.66	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120LS IXYS Integrated Circuits 1: ₱407.36 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	₱407.36 ₱382.21 ₱339.88 ₱322.09 View ₱280.98 ₱274.85 ₱268.71 ₱263.81 ₱262.58	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMT LCA120S IXYS Integrated Circuits 1: ₱384.05 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	₱384.05 ₱342.33 ₱327.00 ₱315.34 View ₱287.73 ₱282.21 ₱277.30 ₱272.39 ₱271.17	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120STR IXYS Integrated Circuits 1: ₱369.94 1,433In Stock 2,000Expected 04/08/2027 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 04/08/2027	Cut Tape ₱369.94 ₱330.06 ₱315.34 ₱304.30 Reel ₱260.12 View ₱293.87 ₱279.76 ₱269.94 ₱252.15 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127 IXYS Integrated Circuits 1: ₱438.04 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	₱438.04 ₱390.19 ₱373.01 ₱359.51 View ₱347.24 ₱330.06 ₱319.02 ₱307.98	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127S IXYS Integrated Circuits 1: ₱475.46 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	₱475.46 ₱446.01 ₱396.32 ₱376.08 View ₱356.44 ₱334.36 ₱322.70 ₱311.66	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA182 IXYS Integrated Circuits 1: ₱312.89 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	₱312.89 ₱279.14 ₱266.87 ₱253.38 View ₱242.95 ₱231.90 ₱220.25 ₱213.50	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182STR IXYS Integrated Circuits 1: ₱305.52 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 ₱305.52 ₱272.39 ₱260.12 ₱251.54 Reel ₱214.73 View ₱241.72 ₱230.68 ₱222.70 ₱207.98 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA710 IXYS Integrated Circuits 1: ₱611.05 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 02/11/2026 4,900 Expected 10/02/2027 Factory Lead-Time: 35 Weeks	₱611.05 ₱574.24 ₱514.73 ₱489.57 View ₱471.17 ₱449.70	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717 IXYS Integrated Circuits 1: ₱612.89 201In Stock 300Expected 02/11/2026	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 02/11/2026	₱612.89 ₱546.02 ₱521.48 ₱503.07 View ₱485.89 ₱446.01 ₱433.13 ₱423.93 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160S IXYS Integrated Circuits 1: ₱411.05 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	₱411.05 ₱366.26 ₱365.03 ₱346.01 View ₱322.09 ₱314.73 ₱307.36 ₱296.93	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP PAA193 IXYS Integrated Circuits 1: ₱671.17 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	₱671.17 ₱598.16 ₱571.17 ₱551.54 View ₱532.52 ₱507.36 ₱463.81 ₱456.44	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 600V 100mA SSR PAA193S IXYS Integrated Circuits 1: ₱671.17 153In Stock 50Expected 07/01/2027	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 07/01/2027	₱671.17 ₱598.16 ₱571.17 ₱551.54 View ₱532.52 ₱492.03 ₱483.44 ₱474.85 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110L IXYS Integrated Circuits 1: ₱474.24 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	₱474.24 ₱422.70 ₱403.68 ₱389.57 View ₱376.08 ₱341.11 ₱336.81 ₱333.13 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA110S IXYS Integrated Circuits 1: ₱498.16 45In Stock 250Expected 05/07/2027	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 05/07/2027	₱498.16 ₱466.87 ₱415.34 ₱394.48 View ₱373.62 ₱348.47 ₱336.81 ₱325.16	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110STR IXYS Integrated Circuits 1: ₱452.76 2,996On 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	2,996On Order On Order Ship Dates Mfr. #: PLA110STR Stock: 0 On Order: 996 Expected 27/01/2027 2,000 Expected 22/03/2027 Factory Lead-Time: 36 Weeks	Cut Tape ₱452.76 ₱443.56 Reel ₱313.50 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132 IXYS Integrated Circuits 1: ₱576.69 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	₱576.69 ₱514.11 ₱490.80 ₱473.62 View ₱470.55 ₱431.90 ₱423.93 ₱419.63 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132S IXYS Integrated Circuits 1: ₱576.69 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	₱576.69 ₱514.11 ₱490.80 ₱473.62 View ₱457.06 ₱433.74 ₱400.00 ₱395.71 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140L IXYS Integrated Circuits 1: ₱583.44 38In Stock 100Expected 03/06/2027	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 03/06/2027	₱583.44 ₱519.63 ₱496.32 ₱479.14 View ₱454.60 ₱442.33 ₱435.59 ₱429.45 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170 IXYS Integrated Circuits 1: ₱436.81 10In Stock 400Expected 29/07/2027	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 29/07/2027	₱436.81 ₱399.39 ₱365.03 ₱346.01 View ₱328.22 ₱296.32	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170S IXYS Integrated Circuits 1: ₱438.04 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 16/11/2026 550 Expected 23/11/2026 Factory Lead-Time: 36 Weeks	₱438.04 ₱410.43 ₱350.92 ₱338.04 View ₱326.38 ₱311.66	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA171PTR IXYS Integrated Circuits 1: ₱462.58 132In Stock 1,000Expected 28/06/2027	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 28/06/2027	Cut Tape ₱462.58 ₱422.70 ₱392.03 ₱378.53 View Reel ₱311.66 ₱365.65 ₱336.81 ₱325.16 ₱311.66 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA191 IXYS Integrated Circuits 1: ₱579.76 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	₱579.76 ₱517.18 ₱498.16 ₱485.28 View ₱430.68 ₱425.16 ₱422.09 Quote	Min.: 1 Mult.: 1