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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 AC Switch 3A, 600V CPC1966Y IXYS Integrated Circuits 1: $8.60 374In Stock 7,650Expected 11/23/2026	Mfr. Part # CPC1966Y Mouser Part # 849-CPC1966Y	IXYS Integrated Circuits	Solid State Relays - PCB Mount AC Switch 3A, 600V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	374In Stock 7,650Expected 11/23/2026	$8.60 $7.66 $7.09 $6.87 View $6.57 $6.31 $6.17 $6.05	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay CPC1976Y IXYS Integrated Circuits 1: $7.73 2,696In Stock 4,175On Order	Mfr. Part # CPC1976Y Mouser Part # 849-CPC1976Y	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,696In Stock 4,175On Order On Order Ship Dates Mfr. #: CPC1976Y Stock: 2,696 Can Ship Immediately On Order: 75 Expected 11/4/2026 4,100 Expected 1/8/2027 Factory Lead-Time: 23 Weeks	$7.73 $6.36 $5.54 $5.18 View $5.00 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay IXYS Integrated Circuits CPC1965G CPC1965G IXYS Integrated Circuits 1: $8.47 11,329In Stock 10,775Expected 8/26/2027 End of Life	Mfr. Part # CPC1965G Mouser Part # 849-CPC1965G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	11,329In Stock 10,775Expected 8/26/2027	$8.47 $7.55 $6.79 $6.55 View $6.31 $5.84 $5.73 $5.60 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay CPC1017NTR IXYS Integrated Circuits 1: $1.92 3,781In Stock 136,000On Order End of Life	Mfr. Part # CPC1017NTR Mouser Part # 849-CPC1017NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,781In Stock 136,000On Order On Order Ship Dates Mfr. #: CPC1017NTR Stock: 3,781 Can Ship Immediately On Order: 68,000 Expected 11/6/2026 68,000 Expected 6/17/2027 Factory Lead-Time: 30 Weeks	Cut Tape $1.92 $1.77 $1.63 $1.58 View Reel $1.36 $1.52 $1.44 $1.40 $1.36 $1.36 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay CPC1019N IXYS Integrated Circuits 1: $4.27 4,926In Stock 4,100Expected 6/2/2027 End of Life	Mfr. Part # CPC1019N Mouser Part # 849-CPC1019N 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	4,926In Stock 4,100Expected 6/2/2027	$4.27 $3.85 $3.60 $3.44 View $3.31 $3.15 $3.05 $2.95 $2.94	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay CPC1393G IXYS Integrated Circuits 1: $4.75 1,005In Stock End of Life	Mfr. Part # CPC1393G Mouser Part # 849-CPC1393G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,005In Stock	$4.75 $4.24 $4.05 $3.91 View $3.75 $3.56 $3.48 $3.32 $3.18	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394GRTR IXYS Integrated Circuits 1: $4.19 3,657In Stock 3,000Expected 7/30/2027 End of Life	Mfr. Part # CPC1394GRTR Mouser Part # 849-CPC1394GRTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,657In Stock 3,000Expected 7/30/2027	Cut Tape $4.19 $3.86 $3.73 $3.59 Reel $3.25 View $3.43 $3.35 $3.23 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay CPC1510GSTR IXYS Integrated Circuits 1: $6.71 7,202Expected 1/6/2028 End of Life	Mfr. Part # CPC1510GSTR Mouser Part # 849-CPC1510GSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,202Expected 1/6/2028	Cut Tape $6.71 $6.14 $5.65 $5.50 Reel $5.50 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1540GS IXYS Integrated Circuits 1: $6.18 448In Stock 2,950Expected 4/19/2027 End of Life	Mfr. Part # CPC1540GS Mouser Part # 849-CPC1540GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	448In Stock 2,950Expected 4/19/2027	$6.18 $5.79 $5.15 $4.89 View $4.63 $4.40 $4.24 $4.10	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A; 60V, 4ADC 2500Vrms Isolation CPC1706Y IXYS Integrated Circuits 1: $7.37 1,035In Stock 8,875On Order End of Life	Mfr. Part # CPC1706Y Mouser Part # 849-CPC1706Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 60V, 4ADC 2500Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,035In Stock 8,875On Order On Order Ship Dates Mfr. #: CPC1706Y Stock: 1,035 Can Ship Immediately On Order: 5,100 Expected 5/10/2027 3,775 Expected 7/23/2027 Factory Lead-Time: 39 Weeks	$7.37 $6.74 $6.26 $6.04 View $5.84 $5.57	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 60V Single Pole 60V Power Relay CPC1909J IXYS Integrated Circuits 1: $21.01 479In Stock 325Expected 7/23/2027 End of Life	Mfr. Part # CPC1909J Mouser Part # 849-CPC1909J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 60V Single Pole 60V Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	479In Stock 325Expected 7/23/2027	$21.01 $19.32 $18.30 $17.29 View $16.66 $15.91 $15.36	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay CPC1945G IXYS Integrated Circuits 1: $9.54 105In Stock End of Life	Mfr. Part # CPC1945G Mouser Part # 849-CPC1945G End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	105In Stock	$9.54 $7.38 $5.97 $5.48 View $5.21 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1000V Single Pole SIP Power Relay CPC1981Y IXYS Integrated Circuits 1: $8.22 394In Stock 2,925On Order End of Life	Mfr. Part # CPC1981Y Mouser Part # 849-CPC1981Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1000V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	394In Stock 2,925On Order On Order Ship Dates Mfr. #: CPC1981Y Stock: 394 Can Ship Immediately On Order: 1,500 Expected 2/8/2027 1,425 Expected 2/12/2027 Factory Lead-Time: 54 Weeks	$8.22 $7.52 $6.91 $6.61 View $6.33 $5.52	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 120MA DPST 8-DIP LAA110 IXYS Integrated Circuits 1: $9.64 956In Stock 5,400On Order End of Life	Mfr. Part # LAA110 Mouser Part # 849-LAA110 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 120MA DPST 8-DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	956In Stock 5,400On Order On Order Ship Dates Mfr. #: LAA110 Stock: 956 Can Ship Immediately On Order: 2,800 Expected 7/15/2027 1,050 Expected 7/19/2027 1,550 Expected 7/23/2027 Factory Lead-Time: 36 Weeks	$9.64 $8.84 $8.10 $7.74 View $7.40 $6.96	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110L IXYS Integrated Circuits 1: $9.40 94In Stock End of Life	Mfr. Part # LAA110L Mouser Part # 849-LAA110L 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	94In Stock	$9.40 $8.38 $8.00 $7.72 View $7.06 $6.77 $6.56 $6.41 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP LAA110S IXYS Integrated Circuits 1: $9.19 1,861In Stock 100Expected 7/12/2027 End of Life	Mfr. Part # LAA110S Mouser Part # 849-LAA110S 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	1,861In Stock 100Expected 7/12/2027	$9.19 $8.19 $7.82 $7.54 View $7.28 $6.90 $6.87 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125LS IXYS Integrated Circuits 1: $10.61 83In Stock End of Life	Mfr. Part # LAA125LS Mouser Part # 849-LAA125LS 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	83In Stock	$10.61 $9.94 $8.84 $8.39 View $7.95 $7.28 $7.03 $6.79	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127LS IXYS Integrated Circuits 1: $12.56 90In Stock End of Life	Mfr. Part # LAA127LS Mouser Part # 849-LAA127LS 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	90In Stock	$12.56 $11.16 $10.61 $10.05 View $9.56 $9.13 $8.82 $8.51	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127STR IXYS Integrated Circuits 1: $11.56 442In Stock End of Life	Mfr. Part # LAA127STR Mouser Part # 849-LAA127STR 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	442In Stock	Cut Tape $11.56 $10.30 $9.84 $9.50 View Reel $8.11 $9.12 $8.70 $8.41 $8.11 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA120 IXYS Integrated Circuits 1: $6.57 1,119In Stock 2,150Expected 7/5/2027 End of Life	Mfr. Part # LCA120 Mouser Part # 849-LCA120 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	1,119In Stock 2,150Expected 7/5/2027	$6.57 $6.16 $5.48 $5.20 View $4.93 $4.67 $4.51 $4.36	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120LS IXYS Integrated Circuits 1: $6.64 84In Stock End of Life	Mfr. Part # LCA120LS Mouser Part # 849-LCA120LS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	84In Stock	$6.64 $6.23 $5.54 $5.25 View $4.58 $4.48 $4.38 $4.30 $4.28	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 6PIN SMT LCA120S IXYS Integrated Circuits 1: $6.26 53In Stock End of Life	Mfr. Part # LCA120S Mouser Part # 849-LCA120S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN SMT Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	53In Stock	$6.26 $5.58 $5.33 $5.14 View $4.69 $4.60 $4.52 $4.44 $4.42	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120STR IXYS Integrated Circuits 1: $6.03 1,433In Stock 2,000Expected 8/4/2027 End of Life	Mfr. Part # LCA120STR Mouser Part # 849-LCA120STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,433In Stock 2,000Expected 8/4/2027	Cut Tape $6.03 $5.38 $5.14 $4.96 Reel $4.24 View $4.79 $4.56 $4.40 $4.11 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127 IXYS Integrated Circuits 1: $7.14 1,921In Stock End of Life	Mfr. Part # LCA127 Mouser Part # 849-LCA127 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	1,921In Stock	$7.14 $6.36 $6.08 $5.86 View $5.66 $5.38 $5.20 $5.02	Min.: 1 Mult.: 1