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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.
Solid State Relays - PCB Mount 1-Form-A 350V 100mA Solid State Relay CPC1035NTR IXYS Integrated Circuits 1: $3.25 8,648In Stock End of Life	Mfr. Part # CPC1035NTR Mouser Part # 849-CPC1035NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 350V 100mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	8,648In Stock	Cut Tape $3.25 $2.97 $2.76 $2.65 View Reel $2.03 $2.55 $2.45 $2.36 $2.28 $2.03 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390GRTR IXYS Integrated Circuits 1: $4.16 9,676In 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	9,676In Stock	Cut Tape $4.16 $3.72 $3.55 $3.42 Reel $3.01 View $3.29 $3.14 $3.03 $2.92 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 1000V Single Pole 1000V Power Relay CPC1988J IXYS Integrated Circuits 1: $40.40 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	$40.40 $38.77 $37.01 $35.74 View $34.51 $32.78 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110STR IXYS Integrated Circuits 1: $8.78 9,758In Stock End of Life	Mfr. Part # LAA110STR Mouser Part # 849-LAA110STR 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	9,758In Stock	Cut Tape $8.78 $7.82 $7.47 $7.21 View Reel $4.84 $6.96 $6.60 $6.37 $4.84 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 60V 1000mA Dual Single-Pole LAA710S IXYS Integrated Circuits 1: $19.34 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	$19.34 $17.23 $16.46 $15.88 View $15.34 $14.57 $14.00 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP AC Solid State Power Switch IXYS Integrated Circuits CPC1998J CPC1998J IXYS Integrated Circuits 1: $21.75 3,155In 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	3,155In Stock 7,700Expected 4/15/2027	$21.75 $19.75 $18.81 $17.99 View $17.38 $16.63 $16.21	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SS Relay SP, NO 4-PIN SOP OptoMOS CPC1004N IXYS Integrated Circuits 1: $3.66 6,600In Stock 9,000Expected 7/5/2027 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	6,600In Stock 9,000Expected 7/5/2027	$3.66 $3.27 $3.09 $2.98 View $2.89 $2.74 $2.66 $2.57	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP CPC1006NTR IXYS Integrated Circuits 1: $2.14 30,057In Stock End of Life	Mfr. Part # CPC1006NTR Mouser Part # 849-CPC1006NTR 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	30,057In Stock	Cut Tape $2.14 $2.06 $1.96 $1.89 Reel $1.52 View $1.82 $1.73 $1.68 $1.52 $1.46 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 250V, 1-Form-A SSR CPC1010NTR IXYS Integrated Circuits 1: $3.91 8,979In Stock 10,000Expected 7/6/2027 End of Life	Mfr. Part # CPC1010NTR Mouser Part # 849-CPC1010NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V, 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	8,979In Stock 10,000Expected 7/6/2027	Cut Tape $3.91 $3.48 $3.33 $3.19 View Reel $2.73 $3.08 $2.94 $2.84 $2.74 $2.73 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount SPNO RELAY CPC1017N IXYS Integrated Circuits 1: $0.86 187,040In Stock 120,000Expected 2/22/2027 End of Life	Mfr. Part # CPC1017N Mouser Part # 849-CPC1017N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPNO RELAY Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	187,040In Stock 120,000Expected 2/22/2027	$0.86 $0.769 $0.74 $0.591 View $0.568 $0.557 $0.531	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay CPC1019NTR IXYS Integrated Circuits 1: $3.91 60,697In 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	60,697In Stock	Cut Tape $3.91 $3.48 $3.33 $3.20 View Reel $2.66 $3.09 $2.95 $2.85 $2.75 $2.66 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A CPC1020N IXYS Integrated Circuits 1: $6.72 34,130In Stock End of Life	Mfr. Part # CPC1020N Mouser Part # 849-CPC1020N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	34,130In Stock	$6.72 $6.00 $5.67 $5.43 View $5.09 $4.81 $4.42	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay CPC1020NTR IXYS Integrated Circuits 1: $6.06 101,556In Stock End of Life	Mfr. Part # CPC1020NTR Mouser Part # 849-CPC1020NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	101,556In Stock	Cut Tape $6.06 $5.40 $5.16 $4.98 View Reel $4.26 $4.81 $4.58 $4.42 $4.32 $4.26 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025N IXYS Integrated Circuits 1: $3.24 7,425In Stock 400Expected 12/25/2026 End of Life	Mfr. Part # CPC1025N Mouser Part # 849-CPC1025N 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	7,425In Stock 400Expected 12/25/2026	$3.24 $2.89 $2.75 $2.66 View $2.55 $2.43 $2.35 $2.27	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025NTR IXYS Integrated Circuits 1: $3.10 64,106In 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	64,106In Stock	Cut Tape $3.10 $2.76 $2.63 $2.54 Reel $2.00 View $2.45 $2.34 $2.26 $2.00 $1.99 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1230N IXYS Integrated Circuits 1: $3.76 1,328In Stock End of Life	Mfr. Part # CPC1230N Mouser Part # 849-CPC1230N 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	1,328In Stock	$3.76 $3.43 $3.15 $2.99 View $2.89 $2.75 $2.67 $2.50 $2.42	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1708J IXYS Integrated Circuits 1: $19.28 492In Stock End of Life	Mfr. Part # CPC1708J Mouser Part # 849-CPC1708J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount DC Only Single Pole i4-PAC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	492In Stock	$19.28 $17.18 $16.39 $15.83 View $15.29 $14.45 $13.95 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V Single Pole DC Power Relay CPC1726Y IXYS Integrated Circuits 1: $8.39 572In Stock End of Life	Mfr. Part # CPC1726Y Mouser Part # 849-CPC1726Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V Single Pole DC Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	572In Stock	$8.39 $7.86 $6.99 $6.64 View $6.29 $5.87 $5.67 $5.47	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1727J IXYS Integrated Circuits 1: $22.99 344In Stock End of Life	Mfr. Part # CPC1727J Mouser Part # 849-CPC1727J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount DC Only Single Pole i4-PAC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	344In Stock	$22.99 $22.00 $18.69 $16.35 Quote Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay CPC1907B IXYS Integrated Circuits 1: $12.02 9,828In Stock 17,625Expected 2/12/2027 End of Life	Mfr. Part # CPC1907B Mouser Part # 849-CPC1907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	9,828In Stock 17,625Expected 2/12/2027	$12.02 $10.70 $10.18 $9.74 View $9.34 $8.92 $8.61 $8.32 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay CPC1968J IXYS Integrated Circuits 1: $45.37 1,146In Stock 150Expected 11/9/2026 End of Life	Mfr. Part # CPC1968J Mouser Part # 849-CPC1968J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,146In Stock 150Expected 11/9/2026	$45.37 $42.47 $38.58	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LSTR IXYS Integrated Circuits 1: $8.98 698In Stock End of Life	Mfr. Part # LAA110LSTR Mouser Part # 849-LAA110LSTR 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	698In Stock	Cut Tape $8.98 $8.01 $7.65 $7.38 Reel $6.29 View $7.13 $6.75 $6.52 $5.93 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110L IXYS Integrated Circuits 1: $4.38 1,116In Stock End of Life	Mfr. Part # LCA110L Mouser Part # 849-LCA110L End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,116In Stock	$4.38 $4.08 $3.90 $3.77 View $3.64 $3.40 $3.25 $3.18 $2.87	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110STR IXYS Integrated Circuits 1: $4.07 8,782In Stock 4,000Expected 8/9/2027 End of Life	Mfr. Part # LCA110STR Mouser Part # 849-LCA110STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	8,782In Stock 4,000Expected 8/9/2027	Cut Tape $4.07 $3.63 $3.47 $3.34 Reel $2.80 View $3.22 $3.08 $2.97 $2.77 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127STR IXYS Integrated Circuits 1: $6.92 1,404In Stock End of Life	Mfr. Part # LCA127STR Mouser Part # 849-LCA127STR 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	1,404In Stock	Cut Tape $6.92 $6.17 $5.89 $5.69 Reel $4.86 View $5.50 $5.23 $5.05 $4.72 MouseReel Available	Min.: 1 Mult.: 1 : 1,000