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 (DKK) 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 Dual Power Relay 60V, 1-Form-A CPC2907B IXYS Integrated Circuits 1: 134,43 kr. 5In Stock 550Expected 03/11/2026 End of Life	Mfr. Part No. CPC2907B Mouser Part No 849-CPC2907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual Power Relay 60V, 1-Form-A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	5In Stock 550Expected 03/11/2026	134,43 kr. 119,58 kr. 109,81 kr. 106,08 kr. 102,43 kr.	Min.: 1 Mult.: 1	PCB Mount	SOIC-8	MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108 IXYS Integrated Circuits 1: 35,81 kr. 305In 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	305In Stock	35,81 kr. 33,57 kr. 29,84 kr. 28,35 kr. View 26,78 kr. 25,51 kr. 24,69 kr. 23,80 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108S IXYS Integrated Circuits 1: 35,06 kr. 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	35,06 kr. 32,00 kr. 29,54 kr. 28,20 kr. View 26,93 kr. 25,74 kr. 23,65 kr.	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: 57,22 kr. 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	57,22 kr. 52,59 kr. 51,32 kr. 42,30 kr. View 39,76 kr. 38,72 kr.	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: 62,59 kr. 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	62,59 kr. 58,64 kr. 53,71 kr. 45,58 kr. View 35,06 kr. 34,99 kr. 34,91 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120S IXYS Integrated Circuits 1: 61,02 kr. 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	61,02 kr. 54,38 kr. 52,00 kr. 49,76 kr. View 43,34 kr. 42,45 kr. 41,78 kr. 41,48 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount DUAL POLE LAA125 IXYS Integrated Circuits 1: 57,52 kr. 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	57,52 kr. 51,32 kr. 49,01 kr. 47,30 kr. View 46,85 kr. 41,33 kr. 40,96 kr. 39,99 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125S IXYS Integrated Circuits 1: 62,51 kr. 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	62,51 kr. 58,56 kr. 52,00 kr. 49,46 kr. View 46,85 kr. 42,82 kr. 41,40 kr. 39,99 kr.	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: 81,46 kr. 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	81,46 kr. 72,51 kr. 69,08 kr. 66,02 kr. View 63,34 kr. 56,77 kr. 56,02 kr. 55,20 kr. 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: 128,54 kr. 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	128,54 kr. 114,36 kr. 108,92 kr. 104,07 kr. 88,40 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA110 IXYS Integrated Circuits 1: 29,24 kr. 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	29,24 kr. 26,11 kr. 24,99 kr. 24,10 kr. View 23,28 kr. 22,23 kr. 21,41 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN SMD LCA110S IXYS Integrated Circuits 1: 27,83 kr. 499In 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	499In Stock 800Expected 09/04/2027	27,83 kr. 25,44 kr. 23,42 kr. 22,53 kr. View 21,78 kr. 20,81 kr.	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: 50,36 kr. 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	50,36 kr. 44,91 kr. 42,67 kr. 40,81 kr. View 39,09 kr. 34,99 kr. 34,47 kr. 34,02 kr. 33,87 kr.	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: 102,58 kr. 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	102,58 kr. 91,16 kr. 86,61 kr. 82,06 kr. View 77,51 kr. 72,81 kr. 70,35 kr.	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: 62,07 kr. 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	62,07 kr. 55,28 kr. 52,82 kr. 47,37 kr. View 45,51 kr. 41,93 kr.	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: 75,05 kr. 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	75,05 kr. 66,69 kr. 63,41 kr. 59,68 kr. View 57,59 kr. 55,20 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140S IXYS Integrated Circuits 1: 98,77 kr. 2.994On Order	Mfr. Part No. PAA140S Mouser Part No 849-PAA140S	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	98,77 kr. 89,97 kr. 85,49 kr. 83,63 kr. 80,87 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA140STR IXYS Integrated Circuits 1: 96,31 kr. 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 96,31 kr. 85,57 kr. 81,31 kr. 77,06 kr. View Reel 66,77 kr. 72,74 kr. 69,15 kr. 66,77 kr. 66,77 kr. 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: 49,68 kr. 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	49,68 kr. 44,24 kr. 40,81 kr. 39,39 kr. View 38,05 kr. 36,33 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA140 IXYS Integrated Circuits 1: 64,53 kr. 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	64,53 kr. 60,50 kr. 53,79 kr. 51,03 kr. View 48,34 kr. 45,88 kr. 44,24 kr. 42,75 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140LSTR IXYS Integrated Circuits 1: 60,80 kr. 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 60,80 kr. 55,65 kr. 51,18 kr. 49,01 kr. View Reel 41,18 kr. 46,92 kr. 44,24 kr. 42,67 kr. 41,18 kr. 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: 61,77 kr. 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 61,77 kr. 57,89 kr. 51,47 kr. 48,86 kr. View Reel 39,91 kr. 46,33 kr. 42,82 kr. 41,33 kr. 39,91 kr. 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: 42,52 kr. 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 42,52 kr. 41,55 kr. 41,03 kr. Reel 29,09 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay CPC1002NTR IXYS Integrated Circuits 1: 17,53 kr. 214.142On 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	214.142On Order On Order Ship Dates Mfr. No: CPC1002NTR Stock: 0 On Order: 20.142 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 17,53 kr. 17,46 kr. 11,56 kr. Reel 11,56 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 100V 300mA Solid State Relay CPC1004NTR IXYS Integrated Circuits 1: 22,83 kr. 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 22,83 kr. 21,41 kr. 19,02 kr. 18,13 kr. View Reel 15,67 kr. 17,68 kr. 16,79 kr. 16,26 kr. 15,67 kr. 15,67 kr. 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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