Optocouplers/Photocouplers

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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 (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Output Type
Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay CPC1983B IXYS Integrated Circuits 1: $11.52 150In Stock End of Life	Mfr. Part No. CPC1983B Mouser Part No 849-CPC1983B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	150In Stock	$11.52 $10.80 $9.59 $9.11 View $7.89 $7.60 $7.48 $7.41	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108 IXYS Integrated Circuits 1: $5.32 295In Stock End of Life	Mfr. Part No. LAA108 Mouser Part No 849-LAA108 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	295In Stock	$5.32 $4.75 $4.53 $4.37 View $4.20 $4.01 $3.87 $3.61 $3.59	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108S IXYS Integrated Circuits 1: $5.46 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	$5.46 $4.99 $4.60 $4.39 View $4.20 $4.01 $3.69	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LS IXYS Integrated Circuits 1: $8.92 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	$8.92 $8.20 $8.00 $6.59 View $6.20 $6.04	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120 IXYS Integrated Circuits 1: $9.75 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	$9.75 $9.14 $8.37 $7.10 View $5.45 Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120S IXYS Integrated Circuits 1: $9.51 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	$9.51 $8.48 $8.10 $7.76 View $6.72 $6.58 $6.45 $6.41 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DUAL POLE LAA125 IXYS Integrated Circuits 1: $8.97 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	$8.97 $8.00 $7.64 $7.37 View $7.30 $6.54 $6.44 $6.35 Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125S IXYS Integrated Circuits 1: $8.97 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	$8.97 $8.12 $7.71 $6.60 View $6.35 $6.21 $6.08	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127S IXYS Integrated Circuits 1: $12.70 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	$12.70 $11.30 $10.77 $10.29 View $9.87 $9.00 $8.85 $8.70 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP LAA710 IXYS Integrated Circuits 1: $20.03 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	$20.03 $17.82 $16.98 $16.22 $13.78	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA110 IXYS Integrated Circuits 1: $4.56 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 19/02/2027 7,900 Expected 21/04/2027 Factory Lead Time: 36 Weeks	$4.56 $4.07 $3.89 $3.75 View $3.63 $3.46 $3.34	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN SMD LCA110S IXYS Integrated Circuits 1: $4.34 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	$4.34 $3.97 $3.65 $3.51 View $3.39 $3.23 $3.03	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127LS IXYS Integrated Circuits 1: $7.85 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	$7.85 $7.00 $6.65 $6.36 View $6.09 $5.45 $5.37 $5.30 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140LS IXYS Integrated Circuits 1: $15.18 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	$15.18 $13.53 $12.92 $12.47 View $11.61 $11.37 $11.22 $11.16 Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount SPST-NO 6 Pin SMD LCA710S IXYS Integrated Circuits 1: $9.67 6,250On 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	6,250On Order On Order Ship Dates Mfr. No: LCA710S Stock: 0 On Order: 400 Expected 23/10/2026 3,100 Expected 18/01/2027 2,750 Expected 02/07/2027 Factory Lead Time: 36 Weeks	$9.67 $8.62 $8.23 $7.38 View $7.09 $6.54	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715S IXYS Integrated Circuits 1: $11.70 4,588Expected 28/06/2027	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 28/06/2027	$11.70 $10.40 $9.88 $9.30 View $8.98 $8.58	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140STR IXYS Integrated Circuits 1: $15.01 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 27/01/2027 2,000 Expected 01/04/2027 Factory Lead Time: 36 Weeks	Cut Tape $15.01 $13.34 $12.67 $12.01 View Reel $10.41 $11.34 $10.78 $10.41 $10.41 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150STR IXYS Integrated Circuits 1: $13.26 1,656Expected 26/07/2027	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 26/07/2027	Cut Tape $13.26 $11.82 $11.29 $10.90 $10.53 Reel $9.37 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA110 IXYS Integrated Circuits 1: $7.74 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	$7.74 $6.90 $6.36 $6.14 View $5.93 $5.66	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA140 IXYS Integrated Circuits 1: $10.06 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 2,650 Expected 19/03/2027 3,200 Expected 21/07/2027 Factory Lead Time: 35 Weeks	$10.06 $9.43 $8.38 $7.95 View $7.53 $7.15 $6.90 $6.66	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140LSTR IXYS Integrated Circuits 1: $9.48 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 $9.48 $8.68 $7.98 $7.64 View Reel $6.42 $7.31 $6.89 $6.65 $6.42 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140STR IXYS Integrated Circuits 1: $9.63 8,993Expected 17/05/2027	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 17/05/2027	Cut Tape $9.63 $9.02 $8.02 $7.62 View Reel $6.22 $7.22 $6.67 $6.44 $6.22 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170STR IXYS Integrated Circuits 1: $6.60 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: 656 Expected 25/01/2027 42,000 Expected 23/06/2027 24,000 Expected 30/07/2027 Factory Lead Time: 36 Weeks	Cut Tape $6.60 $6.40 Reel $4.53 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140S IXYS Integrated Circuits 1: $14.99 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 01/03/2027 1,650 Expected 07/07/2027 Factory Lead Time: 36 Weeks	$14.99 $13.80 $13.20 $12.67 $11.88	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay CPC1002NTR IXYS Integrated Circuits 1: $2.73 201,642On 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	201,642On Order On Order Ship Dates Mfr. No: CPC1002NTR Stock: 0 On Order: 7,642 Expected 28/12/2026 50,000 Expected 04/01/2027 64,000 Expected 20/01/2027 80,000 Expected 25/03/2027 Factory Lead Time: 31 Weeks	Cut Tape $2.73 $2.72 $1.80 Reel $1.80 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET

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