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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 (PEN) Filter the results in the table by unit price based on your quantity.	Qty.
Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay PLA172P IXYS Integrated Circuits 1: S/ 39.51 122In Stock	Mfr. Part # PLA172P Mouser Part # 849-PLA172P	IXYS Integrated Circuits	Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay Learn More about IXYS Integrated Circuits ixys pla172p relays	Datasheet	122In Stock	S/ 39.51 S/ 37.87 S/ 34.84 S/ 31.72 View S/ 30.91 S/ 27.75 S/ 27.09 S/ 26.43 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR OAA160S IXYS Integrated Circuits 1: S/ 41.73 167In Stock	Mfr. Part # OAA160S Mouser Part # 849-OAA160S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 250V 50mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	167In Stock	S/ 41.73 S/ 38.07 S/ 36.59 S/ 35.34 View S/ 34.88 S/ 32.07 S/ 31.22 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA191 IXYS Integrated Circuits 1: S/ 47.53 90In Stock	Mfr. Part # PAA191 Mouser Part # 849-PAA191	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	90In Stock	S/ 47.53 S/ 43.60 S/ 42.08 S/ 40.64 View S/ 37.84 S/ 37.29 S/ 36.86 S/ 36.75 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA PLA143S IXYS Integrated Circuits 1: S/ 25.57 244In Stock	Mfr. Part # PLA143S Mouser Part # 849-PLA143S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	244In Stock	S/ 25.57 S/ 23.74 S/ 22.27 S/ 21.45 View S/ 20.63 S/ 19.66 S/ 19.31 S/ 19.07 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 250mA PLA150S IXYS Integrated Circuits 1: S/ 34.10 137In Stock	Mfr. Part # PLA150S Mouser Part # 849-PLA150S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 250mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	137In Stock	S/ 34.10 S/ 30.40 S/ 29.04 S/ 25.26 View S/ 24.95 S/ 22.38 S/ 21.91 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA160 IXYS Integrated Circuits 1: S/ 28.57 213In Stock	Mfr. Part # PLA160 Mouser Part # 849-PLA160	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	213In Stock	S/ 28.57 S/ 27.25 S/ 26.90 S/ 22.81 View S/ 22.15 S/ 21.84 S/ 21.53	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay CPC1972G IXYS Integrated Circuits 1: S/ 11.41 424In Stock End of Life	Mfr. Part # CPC1972G Mouser Part # 849-CPC1972G End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	424In Stock	S/ 11.41 S/ 9.15 S/ 7.94 S/ 7.75 View S/ 7.08 S/ 6.81 Quote	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay CPC1972GS IXYS Integrated Circuits 1: S/ 11.41 489In Stock End of Life	Mfr. Part # CPC1972GS Mouser Part # 849-CPC1972GS End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 250V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	489In Stock	S/ 11.41 S/ 9.38 S/ 8.60 S/ 7.71 View S/ 7.36 S/ 7.24 S/ 7.01 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount RELAY OPTO 170MA SP-NO 6-SMD LCA125 IXYS Integrated Circuits 1: S/ 27.79 160In Stock End of Life	Mfr. Part # LCA125 Mouser Part # 849-LCA125 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY OPTO 170MA SP-NO 6-SMD Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	160In Stock	S/ 27.79 S/ 23.04 S/ 21.56 S/ 20.79 View S/ 19.81 S/ 19.70 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA PLA143STR IXYS Integrated Circuits 1: S/ 29.47 318In Stock	Mfr. Part # PLA143STR Mouser Part # 849-PLA143STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	318In Stock	Cut Tape S/ 29.47 S/ 27.64 S/ 24.56 S/ 23.32 Reel S/ 17.67 View S/ 22.11 S/ 20.75 S/ 20.01 S/ 17.59 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA PLA193S IXYS Integrated Circuits 1: S/ 25.03 294In Stock	Mfr. Part # PLA193S Mouser Part # 849-PLA193S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	294In Stock	S/ 25.03 S/ 22.30 S/ 21.29 S/ 20.55 View S/ 19.81 S/ 18.37 S/ 18.02 S/ 17.79 S/ 17.75	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SS Relay SP, NO 4-PIN SOP OptoMOS CPC1004N IXYS Integrated Circuits 1: S/ 14.25 12,100In Stock End of Life	Mfr. Part # CPC1004N Mouser Part # 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	12,100In Stock	S/ 14.25 S/ 12.73 S/ 12.03 S/ 11.60 View S/ 11.25 S/ 10.67 S/ 10.35 S/ 10.00	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP CPC1006N IXYS Integrated Circuits 1: S/ 4.90 138,291In Stock End of Life	Mfr. Part # CPC1006N Mouser Part # 849-CPC1006N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	138,291In Stock	S/ 4.90 S/ 4.40 S/ 4.20 S/ 4.05 View S/ 3.88 S/ 3.72 S/ 3.20 S/ 3.09 S/ 2.91	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1008N IXYS Integrated Circuits 1: S/ 9.50 64,112In Stock End of Life	Mfr. Part # CPC1008N Mouser Part # 849-CPC1008N 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	64,112In Stock	S/ 9.50 S/ 8.84 S/ 8.56 S/ 8.37 View S/ 7.32 S/ 7.08 S/ 6.97 S/ 6.93	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay CPC1019NTR IXYS Integrated Circuits 1: S/ 15.22 61,688In Stock End of Life	Mfr. Part # CPC1019NTR Mouser Part # 849-CPC1019NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	61,688In Stock	Cut Tape S/ 15.22 S/ 13.55 S/ 12.96 S/ 12.49 View Reel S/ 10.35 S/ 12.07 S/ 11.52 S/ 11.13 S/ 10.74 S/ 10.35 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025NTR IXYS Integrated Circuits 1: S/ 12.18 104,956In Stock End of Life	Mfr. Part # CPC1025NTR Mouser Part # 849-CPC1025NTR 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	104,956In Stock	Cut Tape S/ 12.18 S/ 11.41 S/ 10.16 S/ 9.81 Reel S/ 8.41 View S/ 9.46 S/ 9.03 S/ 8.72 S/ 8.41 S/ 7.75 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390GRTR IXYS Integrated Circuits 1: S/ 16.19 10,206In Stock End of Life	Mfr. Part # CPC1390GRTR Mouser Part # 849-CPC1390GRTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole Relay 400V 140mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	10,206In Stock	Cut Tape S/ 16.19 S/ 14.48 S/ 13.82 S/ 13.27 Reel S/ 11.72 View S/ 12.81 S/ 12.22 S/ 11.79 S/ 11.29 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 600V AC/DC 1-FORM-A ENHANCED ISO PSIP CPC1984Y IXYS Integrated Circuits 1: S/ 67.50 4,085In Stock End of Life	Mfr. Part # CPC1984Y Mouser Part # 849-CPC1984Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V AC/DC 1-FORM-A ENHANCED ISO PSIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4,085In Stock	S/ 67.50 S/ 60.14 S/ 57.41 S/ 55.43 View S/ 53.41 S/ 50.56 S/ 48.85 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay CPC1988J IXYS Integrated Circuits 1: S/ 157.26 583In Stock End of Life	Mfr. Part # CPC1988J Mouser Part # 849-CPC1988J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	583In Stock	S/ 157.26 S/ 150.91 S/ 144.06 S/ 139.12 View S/ 134.33 S/ 127.60 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole LAA710S IXYS Integrated Circuits 1: S/ 75.28 4,928In Stock End of Life	Mfr. Part # LAA710S Mouser Part # 849-LAA710S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4,928In Stock	S/ 75.28 S/ 67.07 S/ 64.07 S/ 61.81 View S/ 59.71 S/ 56.67 S/ 54.73 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole LAA710STR IXYS Integrated Circuits 1: S/ 76.25 3,105In Stock End of Life	Mfr. Part # LAA710STR Mouser Part # 849-LAA710STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,105In Stock	Cut Tape S/ 76.25 S/ 67.92 S/ 64.85 S/ 61.42 View Reel S/ 52.24 S/ 58.04 S/ 54.73 S/ 52.82 S/ 52.24 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount AC SS Power Switch Dual Power SCR Out CPC1966YX6 IXYS Integrated Circuits 1: S/ 54.22 2,139In Stock	Mfr. Part # CPC1966YX6 Mouser Part # 849-CPC1966YX6	IXYS Integrated Circuits	Solid State Relays - PCB Mount AC SS Power Switch Dual Power SCR Out Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,139In Stock	S/ 54.22 S/ 48.31 S/ 46.09 S/ 44.30 View S/ 42.27 S/ 40.29 S/ 38.89 S/ 38.19 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP AC Solid State Power Switch CPC1998J IXYS Integrated Circuits 1: S/ 84.66 3,500In Stock 7,700Expected 4/15/2027	Mfr. Part # CPC1998J Mouser Part # 849-CPC1998J	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP AC Solid State Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,500In Stock 7,700Expected 4/15/2027	S/ 84.66 S/ 76.88 S/ 73.22 S/ 70.03 View S/ 67.65 S/ 64.73 S/ 63.10	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay LCA701S IXYS Integrated Circuits 1: S/ 40.13 6,626In Stock	Mfr. Part # LCA701S Mouser Part # 849-LCA701S	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6,626In Stock	S/ 40.13 S/ 35.77 S/ 34.14 S/ 32.46 View S/ 30.40 S/ 29.08 S/ 28.45 S/ 28.22 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay LCA701STR IXYS Integrated Circuits 1: S/ 38.34 2,664In Stock	Mfr. Part # LCA701STR Mouser Part # 849-LCA701STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP-NO SS OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,664In Stock	Cut Tape S/ 38.34 S/ 34.18 S/ 32.62 S/ 31.49 View Reel S/ 26.94 S/ 30.44 S/ 28.92 S/ 27.91 S/ 26.94 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000