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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.
Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay CPC1973Y IXYS Integrated Circuits 1: 8,82 € 116In Stock 100Expected 4/1/2027 End of Life	Mfr. Part No. CPC1973Y Mouser Part No 849-CPC1973Y End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	116In Stock 100Expected 4/1/2027	8,82 € 7,25 € 6,48 € 6,06 € View 5,88 € Quote	Min.: 1 Mult.: 1
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
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
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
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
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
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
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
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125S IXYS Integrated Circuits 1: 7,71 € 62In Stock 100Expected 10/30/2026 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 10/30/2026	7,71 € 6,98 € 6,63 € 5,68 € View 5,46 € 5,34 € 5,23 €	Min.: 1 Mult.: 1
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
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP LAA710 IXYS Integrated Circuits 1: 17,23 € 11In Stock 1.200On 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 1.200On Order On Order Ship Dates Mfr. No: LAA710 Stock: 11 Can Dispatch Immediately On Order: 550 Expected 11/20/2026 650 Expected 6/29/2027 Factory Lead Time: 35 Weeks	17,23 € 15,33 € 14,60 € 13,95 € 11,85 €	Min.: 1 Mult.: 1
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 3/8/2027 7.900 Expected 5/7/2027 Factory Lead Time: 36 Weeks	3,92 € 3,50 € 3,35 € 3,23 € View 3,12 € 2,98 € 2,87 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMD LCA110S IXYS Integrated Circuits 1: 3,73 € 507In Stock 800Expected 4/9/2027 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 4/9/2027	3,73 € 3,41 € 3,14 € 3,02 € View 2,92 € 2,79 €	Min.: 1 Mult.: 1
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
Solid State Relays - PCB Mount 1-Form-A 60V 700mA Solid State Relay CPC1002NTR IXYS Integrated Circuits 1: 2,35 € 200.903On 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	200.903On Order On Order Ship Dates Mfr. No: CPC1002NTR Stock: 0 On Order: 56.903 Expected 1/20/2027 64.000 Expected 2/18/2027 80.000 Expected 3/12/2027 Factory Lead Time: 31 Weeks	Cut Tape 2,35 € 2,34 € 1,55 € Reel 1,55 € MouseReel Available	Min.: 1 Mult.: 1 : 2.000
Solid State Relays - PCB Mount SS Relay SP, NO 4-PIN SOP OptoMOS CPC1004N IXYS Integrated Circuits 1: 3,15 € 6.600In Stock 9.000Expected 7/5/2027 End of Life	Mfr. Part No. CPC1004N Mouser Part No 849-CPC1004N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SS Relay SP, NO 4-PIN SOP OptoMOS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6.600In Stock 9.000Expected 7/5/2027	3,15 € 2,81 € 2,66 € 2,56 € View 2,49 € 2,36 € 2,29 € 2,21 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 100V 300mA Solid State Relay CPC1004NTR IXYS Integrated Circuits 1: 3,13 € 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 1/13/2027 6.000 Expected 7/30/2027 Factory Lead Time: 36 Weeks	Cut Tape 3,13 € 2,85 € 2,64 € 2,54 € View Reel 2,06 € 2,45 € 2,34 € 2,26 € 2,18 € 2,06 € MouseReel Available	Min.: 1 Mult.: 1 : 2.000
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225NTR IXYS Integrated Circuits 1: 3,07 € 9.920Expected 8/12/2027 End of Life	Mfr. Part No. CPC1225NTR Mouser Part No 849-CPC1225NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	9.920Expected 8/12/2027	Cut Tape 3,07 € 3,04 € Reel 2,07 € MouseReel Available	Min.: 1 Mult.: 1 : 2.000
Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay CPC1560GS IXYS Integrated Circuits 1: 7,19 € 3.298On Order End of Life	Mfr. Part No. CPC1560GS Mouser Part No 849-CPC1560GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3.298On Order On Order Ship Dates Mfr. No: CPC1560GS Stock: 0 On Order: 998 Expected 11/9/2026 1.000 Expected 12/8/2027 1.300 Expected 12/9/2027 Factory Lead Time: 54 Weeks	7,19 € 6,74 € 5,99 € 5,69 € View 5,39 € 5,03 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST i4-PAC 600V CPC1977J IXYS Integrated Circuits 1: 19,58 € 1.483On Order End of Life	Mfr. Part No. CPC1977J Mouser Part No 849-CPC1977J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST i4-PAC 600V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1.483On Order On Order Ship Dates Mfr. No: CPC1977J Stock: 0 On Order: 8 Expected 1/25/2027 1.475 TBD Factory Lead Time: 54 Weeks	19,58 € 17,49 € 16,69 € 16,08 € 13,76 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1978J IXYS Integrated Circuits 1: 21,91 € 860On Order End of Life	Mfr. Part No. CPC1978J Mouser Part No 849-CPC1978J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	860On Order On Order Ship Dates Mfr. No: CPC1978J Stock: 0 On Order: 535 Expected 1/13/2027 325 Expected 3/31/2027 Factory Lead Time: 54 Weeks	21,91 € 20,14 € 19,08 € 18,03 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST iso PLUS-264 CPC1979J IXYS Integrated Circuits 1: 34,59 € 6.034On Order End of Life	Mfr. Part No. CPC1979J Mouser Part No 849-CPC1979J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST iso PLUS-264 Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6.034On Order On Order Ship Dates Mfr. No: CPC1979J Stock: 0 On Order: 5.809 Expected 12/10/2027 225 Expected 12/16/2027 Factory Lead Time: 73 Weeks	34,59 € 30,93 € 29,48 € 28,41 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation CPC1983Y IXYS Integrated Circuits 1: 9,23 € 7.435On Order End of Life	Mfr. Part No. CPC1983Y Mouser Part No 849-CPC1983Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7.435On Order On Order Ship Dates Mfr. No: CPC1983Y Stock: 0 On Order: 5.510 Expected 7/29/2027 1.925 Expected 8/5/2027 Factory Lead Time: 40 Weeks	9,23 € 8,45 € 7,77 € 7,43 € View 6,99 € 6,67 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount RELAY, SS ICS CPC1983YE IXYS Integrated Circuits 1: 9,42 € 12.866On Order End of Life	Mfr. Part No. CPC1983YE Mouser Part No 849-CPC1983YE End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY, SS ICS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	12.866On Order On Order Ship Dates Mfr. No: CPC1983YE Stock: 0 On Order: 7.016 Expected 11/18/2026 5.850 Expected 1/29/2027 Factory Lead Time: 37 Weeks	9,42 € 8,76 € 8,02 € 7,74 € View 7,47 € 7,14 €	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108STR IXYS Integrated Circuits 1: 4,58 € 7.000On Order End of Life	Mfr. Part No. LAA108STR Mouser Part No 849-LAA108STR 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	7.000On Order On Order Ship Dates Mfr. No: LAA108STR Stock: 0 On Order: 5.000 Expected 7/28/2027 2.000 Expected 7/30/2027 Factory Lead Time: 36 Weeks	Cut Tape 4,58 € 4,14 € 3,82 € 3,62 € View Reel 3,01 € 3,45 € 3,29 € 3,18 € 3,01 € MouseReel Available	Min.: 1 Mult.: 1 : 1.000