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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 (CLP) Filter the results in the table by unit price based on your quantity.	Qty.
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150S IXYS Integrated Circuits 1: $16.565 267In 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	267In Stock	$16.565 $14.719 $13.990 $13.250 View $12.509 $11.894 $11.484	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 250V 250mA PLA150 IXYS Integrated Circuits 1: $9.912 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	$9.912 $8.841 $8.442 $7.485 View $7.155 $6.824 $6.426	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA150STR IXYS Integrated Circuits 1: $10.310 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 $10.310 $9.729 Reel $6.870 $6.107 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA PLA160STR IXYS Integrated Circuits 1: $9.980 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 $9.980 $8.898 $8.476 $8.055 View Reel $6.585 $7.633 $7.075 $6.836 $6.585 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single Pole 800V, 100mA SSR PLA171P IXYS Integrated Circuits 1: $8.146 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	$8.146 $7.474 $7.189 $6.927 View $6.688 $6.528 $6.300 $6.084 $5.355	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay PLA172PTR IXYS Integrated Circuits 1: $11.040 429In Stock	Mfr. Part # PLA172PTR Mouser Part # 849-PLA172PTR	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	429In Stock	Cut Tape $11.040 $9.843 $9.399 $9.080 View Reel $7.747 $8.772 $8.328 $8.043 $7.747 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA191S IXYS Integrated Circuits 1: $10.835 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	$10.835 $9.650 $9.342 $8.852 View $8.214 $7.850 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA PLA193STR IXYS Integrated Circuits 1: $7.417 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 $7.417 $7.143 Reel $5.047 $4.751 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: $9.650 11.365In 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	11.365In Stock 10.775Expected 8/26/2027	$9.650 $8.602 $7.747 $7.474 View $7.200 $6.665 $6.482 $6.380 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay CPC1017NTR IXYS Integrated Circuits 1: $2.187 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 $2.187 $2.017 $1.857 $1.800 View Reel $1.549 $1.732 $1.641 $1.595 $1.549 $1.549 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: $4.865 4.936In 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	4.936In Stock 4.100Expected 6/2/2027	$4.865 $4.386 $4.101 $3.919 View $3.771 $3.589 $3.475 $3.361 $3.349	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay CPC1330G IXYS Integrated Circuits 1: $4.443 439In Stock End of Life	Mfr. Part # CPC1330G Mouser Part # 849-CPC1330G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	439In Stock	$4.443 $4.170 $3.703 $3.532 View $3.406 $3.247 $3.144 $3.030	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay CPC1330GR IXYS Integrated Circuits 1: $4.443 1.570In Stock 500Expected 1/13/2027 End of Life	Mfr. Part # CPC1330GR Mouser Part # 849-CPC1330GR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1.570In Stock 500Expected 1/13/2027	$4.443 $4.170 $3.703 $3.532 View $3.406 $3.247 $3.144 $3.030	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay CPC1393G IXYS Integrated Circuits 1: $5.412 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	$5.412 $4.831 $4.614 $4.455 View $4.272 $4.056 $3.965 $3.782 $3.623	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394GRTR IXYS Integrated Circuits 1: $4.819 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 $4.819 $4.409 $4.249 $4.079 View Reel $3.612 $3.885 $3.760 $3.612 MouseReel Available	Min.: 1 Mult.: 1 : 1.000
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1540GS IXYS Integrated Circuits 1: $7.041 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	$7.041 $6.596 $5.867 $5.571 View $5.275 $5.013 $4.831 $4.671	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1727J IXYS Integrated Circuits 1: $26.192 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	$26.192 $25.064 $21.293 $18.627 Quote Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 60V Single Pole 60V Power Relay CPC1909J IXYS Integrated Circuits 1: $23.936 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	$23.936 $22.011 $20.849 $19.698 View $18.980 $18.126 $17.499	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay CPC1945G IXYS Integrated Circuits 1: $10.869 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	$10.869 $8.408 $6.801 $6.243 View $5.936 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1000V Single Pole SIP Power Relay CPC1981Y IXYS Integrated Circuits 1: $9.365 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	$9.365 $8.567 $7.872 $7.531 View $7.212 $6.289	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 120MA DPST 8-DIP LAA110 IXYS Integrated Circuits 1: $10.983 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	$10.983 $10.071 $9.228 $8.818 View $8.431 $7.929	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110L IXYS Integrated Circuits 1: $10.709 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	$10.709 $9.547 $9.114 $8.795 View $7.861 $7.576 $7.360 $7.257	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125LS IXYS Integrated Circuits 1: $12.088 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	$12.088 $11.324 $10.071 $9.559 View $9.057 $8.294 $8.009 $7.736	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127LS IXYS Integrated Circuits 1: $14.309 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	$14.309 $12.714 $12.088 $11.450 View $10.891 $10.402 $10.048 $9.695	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127STR IXYS Integrated Circuits 1: $13.170 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 $13.170 $11.735 $11.210 $10.823 View Reel $9.274 $10.424 $9.946 $9.604 $9.274 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1.000