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 (EUR) 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: 9,91 € 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	9,91 € 9,29 € 8,25 € 7,83 € View 6,79 € 6,54 € 6,43 € 6,37 €	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108 IXYS Integrated Circuits 1: 4,58 € 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	4,58 € 4,09 € 3,90 € 3,76 € View 3,61 € 3,45 € 3,33 € 3,10 € 3,09 €	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108S IXYS Integrated Circuits 1: 4,70 € 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	4,70 € 4,29 € 3,96 € 3,78 € View 3,61 € 3,45 € 3,17 €	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: 7,67 € 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	7,67 € 7,05 € 6,88 € 5,67 € View 5,33 € 5,19 €	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: 8,39 € 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	8,39 € 7,86 € 7,20 € 6,11 € View 4,69 € 4,67 €	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120S IXYS Integrated Circuits 1: 8,18 € 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	8,18 € 7,29 € 6,97 € 6,67 € View 5,78 € 5,66 € 5,55 € 5,51 € Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DUAL POLE LAA125 IXYS Integrated Circuits 1: 7,71 € 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	7,71 € 6,88 € 6,57 € 6,34 € View 6,28 € 5,62 € 5,54 € 5,46 € 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: 7,71 € 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	7,71 € 6,98 € 6,63 € 5,68 € View 5,46 € 5,34 € 5,23 €	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: 10,92 € 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	10,92 € 9,72 € 9,26 € 8,85 € View 8,49 € 7,74 € 7,61 € 7,48 € 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: 17,23 € 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	17,23 € 15,33 € 14,60 € 13,95 € 11,85 €	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA110 IXYS Integrated Circuits 1: 3,92 € 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	3,92 € 3,50 € 3,35 € 3,23 € View 3,12 € 2,98 € 2,87 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN SMD LCA110S IXYS Integrated Circuits 1: 3,73 € 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	3,73 € 3,41 € 3,14 € 3,02 € View 2,92 € 2,79 €	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: 6,75 € 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	6,75 € 6,02 € 5,72 € 5,47 € View 5,24 € 4,69 € 4,62 € 4,56 € 4,54 €	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: 13,05 € 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	13,05 € 11,64 € 11,11 € 10,72 € View 9,98 € 9,78 € 9,65 € 9,60 € 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: 8,32 € 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	8,32 € 7,41 € 7,08 € 6,35 € View 6,10 € 5,62 €	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: 10,06 € 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	10,06 € 8,94 € 8,50 € 8,00 € View 7,72 € 7,40 €	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: 12,91 € 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 12,91 € 11,47 € 10,90 € 10,33 € View Reel 8,95 € 9,75 € 9,27 € 8,95 € 8,95 € 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: 11,40 € 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 11,40 € 10,17 € 9,71 € 9,37 € 9,06 € Reel 8,06 € 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: 6,66 € 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	6,66 € 5,93 € 5,47 € 5,28 € View 5,10 € 4,87 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA140 IXYS Integrated Circuits 1: 8,65 € 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	8,65 € 8,11 € 7,21 € 6,84 € View 6,48 € 6,15 € 5,93 € 5,73 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140LSTR IXYS Integrated Circuits 1: 8,15 € 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 8,15 € 7,46 € 6,86 € 6,57 € View Reel 5,52 € 6,29 € 5,93 € 5,72 € 5,52 € 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: 8,28 € 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 8,28 € 7,76 € 6,90 € 6,55 € View Reel 5,35 € 6,21 € 5,74 € 5,54 € 5,35 € 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: 5,68 € 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 5,68 € 5,50 € Reel 3,90 € 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: 12,89 € 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	12,89 € 11,87 € 11,35 € 10,90 € 10,22 €	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: 2,35 € 201 542On 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 542On Order On Order Ship Dates Mfr. No: CPC1002NTR Stock: 0 On Order: 7 542 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 2,35 € 2,34 € 1,55 € Reel 1,55 € MouseReel Available	Min.: 1 Mult.: 1 : 2 000	PCB Mount	SOP-4	MOSFET

OptoMOS 1-Form-A (SPST-NO) Solid State Relays

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