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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 100V 300mA Double Pole Relay LAA108S IXYS Integrated Circuits 1: Rp100.169 3In Stock End of Life	Mfr. Part No. LAA108S Mouser Part No 849-LAA108S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 100V 300mA Double Pole Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3In Stock	Rp100.169 Rp91.547 Rp84.392 Rp80.539 View Rp77.053 Rp73.567 Rp67.697	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LS IXYS Integrated Circuits 1: Rp163.646 6In Stock End of Life	Mfr. Part No. LAA110LS Mouser Part No 849-LAA110LS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6In Stock	Rp163.646 Rp150.437 Rp146.768 Rp120.900 View Rp113.745 Rp110.810	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120 IXYS Integrated Circuits 1: Rp178.874 156In Stock End of Life	Mfr. Part No. LAA120 Mouser Part No 849-LAA120 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	156In Stock	Rp178.874 Rp167.682 Rp153.556 Rp130.257 View Rp99.986 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120S IXYS Integrated Circuits 1: Rp174.470 3In Stock End of Life	Mfr. Part No. LAA120S Mouser Part No 849-LAA120S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3In Stock	Rp174.470 Rp155.574 Rp148.603 Rp142.365 View Rp123.285 Rp120.717 Rp118.332 Rp117.598 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DUAL POLE LAA125 IXYS Integrated Circuits 1: Rp164.564 125In Stock End of Life	Mfr. Part No. LAA125 Mouser Part No 849-LAA125 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount DUAL POLE Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	125In Stock	Rp164.564 Rp146.768 Rp140.163 Rp135.210 View Rp133.926 Rp119.983 Rp118.148 Rp116.497 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125S IXYS Integrated Circuits 1: Rp164.564 62In Stock 100Expected 30/10/2026 End of Life	Mfr. Part No. LAA125S Mouser Part No 849-LAA125S 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	62In Stock 100Expected 30/10/2026	Rp164.564 Rp148.970 Rp141.448 Rp121.084 View Rp116.497 Rp113.929 Rp111.544	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127S IXYS Integrated Circuits 1: Rp232.994 48In Stock End of Life	Mfr. Part No. LAA127S Mouser Part No 849-LAA127S 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	48In Stock	Rp232.994 Rp207.310 Rp197.586 Rp188.780 View Rp181.075 Rp165.114 Rp162.362 Rp159.610 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP LAA710 IXYS Integrated Circuits 1: Rp367.470 11In Stock 1.250On Order End of Life	Mfr. Part No. LAA710 Mouser Part No 849-LAA710 End of Life	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	11In Stock 1.250On Order On Order Ship Dates Mfr. No: LAA710 Stock: 11 Can Dispatch Immediately On Order: 550 Expected 20/11/2026 700 Expected 17/05/2027 Factory Lead Time: 35 Weeks	Rp367.470 Rp326.926 Rp311.515 Rp297.572 Rp252.808	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA110 IXYS Integrated Circuits 1: Rp83.658 56In Stock 17.250On Order End of Life	Mfr. Part No. LCA110 Mouser Part No 849-LCA110 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	56In Stock 17.250On Order On Order Ship Dates Mfr. No: LCA110 Stock: 56 Can Dispatch Immediately On Order: 9.350 Expected 08/03/2027 7.900 Expected 07/05/2027 Factory Lead Time: 36 Weeks	Rp83.658 Rp74.668 Rp71.366 Rp68.798 View Rp66.596 Rp63.477 Rp61.276	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMD LCA110S IXYS Integrated Circuits 1: Rp79.622 507In Stock 800Expected 09/04/2027 End of Life	Mfr. Part No. LCA110S Mouser Part No 849-LCA110S End of Life	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	507In Stock 800Expected 09/04/2027	Rp79.622 Rp72.834 Rp66.963 Rp64.394 View Rp62.193 Rp59.258 Rp55.588	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127LS IXYS Integrated Circuits 1: Rp144.016 14In Stock End of Life	Mfr. Part No. LCA127LS Mouser Part No 849-LCA127LS 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	14In Stock	Rp144.016 Rp128.422 Rp122.001 Rp116.681 View Rp111.727 Rp99.986 Rp98.518 Rp97.234 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140LS IXYS Integrated Circuits 1: Rp278.492 41In Stock	Mfr. Part No. PAA140LS Mouser Part No 849-PAA140LS	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	41In Stock	Rp278.492 Rp248.221 Rp237.030 Rp228.775 View Rp212.997 Rp208.594 Rp205.842 Rp204.741 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6 Pin SMD LCA710S IXYS Integrated Circuits 1: Rp177.406 23In Stock 5.850On Order	Mfr. Part No. LCA710S Mouser Part No 849-LCA710S	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6 Pin SMD Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	23In Stock 5.850On Order On Order Ship Dates Mfr. No: LCA710S Stock: 23 Can Dispatch Immediately On Order: 2.750 Expected 02/07/2027 3.100 Expected 09/07/2027 Factory Lead Time: 36 Weeks	Rp177.406 Rp158.143 Rp150.988 Rp135.393 View Rp130.073 Rp119.983	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715S IXYS Integrated Circuits 1: Rp214.648 4.588Expected 19/04/2027	Mfr. Part No. LCA715S Mouser Part No 849-LCA715S	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4.588Expected 19/04/2027	Rp214.648 Rp190.798 Rp181.258 Rp170.618 View Rp164.747 Rp157.409	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140STR IXYS Integrated Circuits 1: Rp275.373 4.000On Order	Mfr. Part No. PAA140STR Mouser Part No 849-PAA140STR	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	4.000On Order On Order Ship Dates Mfr. No: PAA140STR Stock: 0 On Order: 2.000 Expected 10/02/2027 2.000 Expected 11/03/2027 Factory Lead Time: 36 Weeks	Cut Tape Rp275.373 Rp244.736 Rp232.444 Rp220.335 View Reel Rp190.982 Rp208.044 Rp197.770 Rp190.982 Rp190.982 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150STR IXYS Integrated Circuits 1: Rp243.268 1.656Expected 29/06/2027	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	1.656Expected 29/06/2027	Cut Tape Rp243.268 Rp216.850 Rp207.126 Rp199.971 Rp193.183 Reel Rp171.902 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA110 IXYS Integrated Circuits 1: Rp141.998 4.141Expected 30/07/2027	Mfr. Part No. PLA110 Mouser Part No 849-PLA110	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	4.141Expected 30/07/2027	Rp141.998 Rp126.587 Rp116.681 Rp112.644 View Rp108.792 Rp103.838	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA140 IXYS Integrated Circuits 1: Rp184.561 8.550On Order	Mfr. Part No. PLA140 Mouser Part No 849-PLA140	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	8.550On Order On Order Ship Dates Mfr. No: PLA140 Stock: 0 On Order: 2.700 Expected 25/01/2027 3.200 Expected 21/07/2027 2.650 Expected 02/08/2027 Factory Lead Time: 35 Weeks	Rp184.561 Rp173.003 Rp153.739 Rp145.851 View Rp138.145 Rp131.174 Rp126.587 Rp122.184	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140LSTR IXYS Integrated Circuits 1: Rp173.920 3.000Expected 21/07/2027	Mfr. Part No. PLA140LSTR Mouser Part No 849-PLA140LSTR	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	3.000Expected 21/07/2027	Cut Tape Rp173.920 Rp159.243 Rp146.401 Rp140.163 View Reel Rp117.781 Rp134.109 Rp126.404 Rp122.001 Rp117.781 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140STR IXYS Integrated Circuits 1: Rp176.672 8.993Expected 02/08/2027	Mfr. Part No. PLA140STR Mouser Part No 849-PLA140STR	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	8.993Expected 02/08/2027	Cut Tape Rp176.672 Rp165.481 Rp147.135 Rp139.797 View Reel Rp114.112 Rp132.458 Rp122.368 Rp118.148 Rp114.112 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170STR IXYS Integrated Circuits 1: Rp121.084 66.656On Order	Mfr. Part No. PLA170STR Mouser Part No 849-PLA170STR	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	66.656On Order On Order Ship Dates Mfr. No: PLA170STR Stock: 0 On Order: 21.656 Expected 30/07/2027 42.000 Expected 06/08/2027 3.000 Expected 09/08/2027 Factory Lead Time: 36 Weeks	Cut Tape Rp121.084 Rp117.414 Reel Rp83.107 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140S IXYS Integrated Circuits 1: Rp275.007 2.994On Order NRND	Mfr. Part No. PAA140S Mouser Part No 849-PAA140S NRND	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	2.994On Order On Order Ship Dates Mfr. No: PAA140S Stock: 0 On Order: 1.344 Expected 08/02/2027 1.650 Expected 01/03/2027 Factory Lead Time: 36 Weeks	Rp275.007 Rp253.175 Rp242.167 Rp232.444 Rp217.950	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay CPC1002N IXYS Integrated Circuits 1: Rp57.240 5.157In Stock 111.300On Order End of Life	Mfr. Part No. CPC1002N Mouser Part No 849-CPC1002N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	5.157In Stock 111.300On Order On Order Ship Dates Mfr. No: CPC1002N Stock: 5.157 Can Dispatch Immediately On Order: 44.600 Expected 25/05/2027 46.600 Expected 23/06/2027 20.100 Expected 25/06/2027 Factory Lead Time: 31 Weeks	Rp57.240 Rp51.002 Rp48.800 Rp47.149 View Rp45.498 Rp43.113 Rp42.012	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay CPC1002NTR IXYS Integrated Circuits 1: Rp50.085 200.935On Order End of Life	Mfr. Part No. CPC1002NTR Mouser Part No 849-CPC1002NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	200.935On Order On Order Ship Dates Mfr. No: CPC1002NTR Stock: 0 On Order: 56.935 Expected 20/01/2027 64.000 Expected 18/02/2027 80.000 Expected 12/03/2027 Factory Lead Time: 31 Weeks	Cut Tape Rp50.085 Rp49.901 Rp33.023 Reel Rp33.023 MouseReel Available	Min.: 1 Mult.: 1 : 2.000
Solid State Relays - PCB Mount 1-Form-A 100V 300mA Solid State Relay CPC1004NTR IXYS Integrated Circuits 1: Rp66.779 8.186On Order End of Life	Mfr. Part No. CPC1004NTR Mouser Part No 849-CPC1004NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 100V 300mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	8.186On Order On Order Ship Dates Mfr. No: CPC1004NTR Stock: 0 On Order: 2.186 Expected 13/01/2027 6.000 Expected 30/07/2027 Factory Lead Time: 36 Weeks	Cut Tape Rp66.779 Rp60.725 Rp56.322 Rp54.121 View Reel Rp43.847 Rp52.286 Rp49.901 Rp48.250 Rp46.599 Rp43.847 MouseReel Available	Min.: 1 Mult.: 1 : 2.000