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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 30V 2000 mA Solid State Relay LCA717STR IXYS Integrated Circuits 1: $9.54 812In Stock 2,000Expected 7/15/2027	Mfr. Part # LCA717STR Mouser Part # 849-LCA717STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	812In Stock 2,000Expected 7/15/2027	Cut Tape $9.54 $8.50 $8.12 $7.84 View Reel $6.66 $7.57 $7.19 $7.02 $6.66 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150S IXYS Integrated Circuits 1: $14.55 236In Stock	Mfr. Part # PAA150S Mouser Part # 849-PAA150S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	236In Stock	$14.55 $12.93 $12.29 $11.64 View $10.98 $10.73 $9.48 $9.40 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 250mA PLA150 IXYS Integrated Circuits 1: $8.70 835In Stock	Mfr. Part # PLA150 Mouser Part # 849-PLA150	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	835In Stock	$8.70 $7.76 $7.41 $7.15 View $6.90 $6.56 $6.31 $5.75 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA150STR IXYS Integrated Circuits 1: $9.05 1,089In Stock	Mfr. Part # PLA150STR Mouser Part # 849-PLA150STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,089In Stock	Cut Tape $9.05 $8.54 Reel $6.03 $5.33 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA PLA160STR IXYS Integrated Circuits 1: $8.76 754In Stock	Mfr. Part # PLA160STR Mouser Part # 849-PLA160STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	754In Stock	Cut Tape $8.76 $7.81 $7.45 $7.14 View Reel $5.98 $6.83 $6.43 $6.21 $5.98 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single Pole 800V, 100mA SSR PLA171P IXYS Integrated Circuits 1: $7.15 971In Stock	Mfr. Part # PLA171P Mouser Part # 849-PLA171P	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole 800V, 100mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	971In Stock	$7.15 $6.56 $6.31 $6.08 View $5.87 $5.73 $5.53 $5.34 $4.70	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA191S IXYS Integrated Circuits 1: $9.51 731In Stock	Mfr. Part # PLA191S Mouser Part # 849-PLA191S	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	731In Stock	$9.51 $8.47 $8.20 $7.77 View $7.21 $6.89 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA PLA193STR IXYS Integrated Circuits 1: $6.51 1,719In Stock 2,000Expected 11/13/2026	Mfr. Part # PLA193STR Mouser Part # 849-PLA193STR	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	1,719In Stock 2,000Expected 11/13/2026	Cut Tape $6.51 $6.27 Reel $4.43 $4.22 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay IXYS Integrated Circuits CPC1965G CPC1965G IXYS Integrated Circuits 1: $8.47 11,344In 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	11,344In 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 100V 100mA Solid State Relay CPC1016N IXYS Integrated Circuits 1: $3.21 1,067In Stock End of Life	Mfr. Part # CPC1016N Mouser Part # 849-CPC1016N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,067In Stock	$3.21 $3.01 $2.68 $2.58 View $2.49 $2.37 $2.29 $2.21	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay CPC1017NTR IXYS Integrated Circuits 1: $1.92 5,505In 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	5,505In Stock 136,000On Order On Order Ship Dates Mfr. #: CPC1017NTR Stock: 5,505 Can Ship Immediately On Order: 68,000 Expected 12/2/2026 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 2,527In Stock 5,000On Order 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	2,527In Stock 5,000On Order On Order Ship Dates Mfr. #: CPC1394GRTR Stock: 2,527 Can Ship Immediately On Order: 2,000 Expected 11/2/2026 3,000 Expected 7/30/2027 Factory Lead-Time: 36 Weeks	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 SP, Normally-Open OptoMOS Relay CPC1540GS IXYS Integrated Circuits 1: $6.18 448In Stock 2,950On Order 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 2,950On Order On Order Ship Dates Mfr. #: CPC1540GS Stock: 448 Can Ship Immediately On Order: 950 Expected 12/7/2026 2,000 Expected 3/1/2027 Factory Lead-Time: 54 Weeks	$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 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 SPST i4-PAC 600V CPC1977J IXYS Integrated Circuits 1: $22.77 308In Stock 425Expected 2/19/2027 End of Life	Mfr. Part # CPC1977J Mouser Part # 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	308In Stock 425Expected 2/19/2027	$22.77 $20.34 $19.41 $18.70 View $18.04 $15.97 $15.66 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1000V Single Pole SIP Power Relay CPC1981Y IXYS Integrated Circuits 1: $8.22 398In 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	398In Stock 2,925On Order On Order Ship Dates Mfr. #: CPC1981Y Stock: 398 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: $8.22 1,865In Stock 100Expected 4/5/2027 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	1,865In Stock 100Expected 4/5/2027	$8.22 $7.66 $7.18 $6.93 View $6.72 $6.48	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