Optocouplers/Photocouplers

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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 (DKK) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Output Type
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150S IXYS Integrated Circuits 1: 93,25 kr. 267In Stock	Mfr. Part No. PAA150S Mouser Part No 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	93,25 kr. 82,88 kr. 78,78 kr. 74,60 kr. View 70,42 kr. 66,99 kr. 64,68 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 250mA PLA150 IXYS Integrated Circuits 1: 55,80 kr. 835In Stock	Mfr. Part No. PLA150 Mouser Part No 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	55,80 kr. 49,76 kr. 47,52 kr. 42,15 kr. View 40,28 kr. 38,42 kr. 36,18 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA150STR IXYS Integrated Circuits 1: 58,04 kr. 1.089In Stock	Mfr. Part No. PLA150STR Mouser Part No 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 58,04 kr. 54,76 kr. Reel 38,72 kr. 34,39 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 300V 50mA PLA160STR IXYS Integrated Circuits 1: 56,17 kr. 754In Stock	Mfr. Part No. PLA160STR Mouser Part No 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 56,17 kr. 50,13 kr. 47,74 kr. 45,36 kr. View Reel 37,08 kr. 42,97 kr. 39,84 kr. 38,49 kr. 37,08 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount		MOSFET
Solid State Relays - PCB Mount Single Pole 800V, 100mA SSR PLA171P IXYS Integrated Circuits 1: 45,88 kr. 971In Stock	Mfr. Part No. PLA171P Mouser Part No 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	45,88 kr. 42,07 kr. 40,51 kr. 39,02 kr. View 37,67 kr. 36,85 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay PLA172PTR IXYS Integrated Circuits 1: 62,14 kr. 429In Stock	Mfr. Part No. PLA172PTR Mouser Part No 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 62,14 kr. 55,43 kr. 52,97 kr. 51,10 kr. Reel 43,64 kr. View 49,39 kr. 46,92 kr. 45,28 kr. 43,04 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA191S IXYS Integrated Circuits 1: 61,02 kr. 731In Stock	Mfr. Part No. PLA191S Mouser Part No 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	61,02 kr. 54,31 kr. 52,59 kr. 49,83 kr. View 46,25 kr. 44,24 kr. Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 600V 100mA PLA193STR IXYS Integrated Circuits 1: 41,78 kr. 1.719In Stock 2.000Expected 13/11/2026	Mfr. Part No. PLA193STR Mouser Part No 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 13/11/2026	Cut Tape 41,78 kr. 40,21 kr. Reel 28,42 kr. 26,78 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount 600V, 1A AC Solid State Relay IXYS Integrated Circuits CPC1965G CPC1965G IXYS Integrated Circuits 1: 54,31 kr. 11.365In Stock 10.775Expected 26/08/2027 End of Life	Mfr. Part No. CPC1965G Mouser Part No 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 26/08/2027	54,31 kr. 48,42 kr. 43,64 kr. 42,07 kr. View 40,58 kr. 37,52 kr. 36,48 kr. 35,96 kr. Quote	Min.: 1 Mult.: 1	PCB Mount		SCR
Solid State Relays - PCB Mount 1-Form-A 60V 100mA Solid State Relay CPC1017NTR IXYS Integrated Circuits 1: 12,31 kr. 5.169In Stock 136.000On Order End of Life	Mfr. Part No. CPC1017NTR Mouser Part No 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	5.169In Stock 136.000On Order On Order Ship Dates Mfr. No: CPC1017NTR Stock: 5.169 Can Dispatch Immediately On Order: 68.000 Expected 02/12/2026 68.000 Expected 17/06/2027 Factory Lead Time: 30 Weeks	Cut Tape 12,31 kr. 11,34 kr. 10,44 kr. 10,15 kr. View Reel 8,73 kr. 9,77 kr. 9,25 kr. 8,95 kr. 8,73 kr. 8,73 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay CPC1019N IXYS Integrated Circuits 1: 27,38 kr. 4.936In Stock 4.100Expected 02/06/2027 End of Life	Mfr. Part No. CPC1019N Mouser Part No 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 02/06/2027	27,38 kr. 24,69 kr. 23,13 kr. 22,08 kr. View 21,26 kr. 20,22 kr. 19,55 kr. 18,95 kr. 18,87 kr.	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay CPC1330G IXYS Integrated Circuits 1: 24,99 kr. 439In Stock End of Life	Mfr. Part No. CPC1330G Mouser Part No 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	24,99 kr. 23,50 kr. 20,89 kr. 19,92 kr. View 19,17 kr. 18,28 kr. 17,68 kr. 17,08 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-4	MOSFET
Solid State Relays - PCB Mount 350V 120mA Single OptoMOS Relay CPC1330GR IXYS Integrated Circuits 1: 24,99 kr. 1.570In Stock 500Expected 13/01/2027 End of Life	Mfr. Part No. CPC1330GR Mouser Part No 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 13/01/2027	24,99 kr. 23,50 kr. 20,89 kr. 19,92 kr. View 19,17 kr. 18,28 kr. 17,68 kr. 17,08 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-4	MOSFET
Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay CPC1393G IXYS Integrated Circuits 1: 30,51 kr. 1.005In Stock End of Life	Mfr. Part No. CPC1393G Mouser Part No 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	30,51 kr. 27,23 kr. 25,96 kr. 25,07 kr. View 24,10 kr. 22,83 kr. 22,31 kr. 21,34 kr. 20,37 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394GRTR IXYS Integrated Circuits 1: 27,15 kr. 2.527In Stock 5.000On Order End of Life	Mfr. Part No. CPC1394GRTR Mouser Part No 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. No: CPC1394GRTR Stock: 2.527 Can Dispatch Immediately On Order: 2.000 Expected 02/11/2026 3.000 Expected 30/07/2027 Factory Lead Time: 36 Weeks	Cut Tape 27,15 kr. 24,84 kr. 23,95 kr. 22,98 kr. View Reel 20,37 kr. 21,86 kr. 21,19 kr. 20,37 kr. MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount		MOSFET
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1540GS IXYS Integrated Circuits 1: 39,61 kr. 448In Stock 2.950On Order End of Life	Mfr. Part No. CPC1540GS Mouser Part No 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. No: CPC1540GS Stock: 448 Can Dispatch Immediately On Order: 950 Expected 07/12/2026 2.000 Expected 01/03/2027 Factory Lead Time: 54 Weeks	39,61 kr. 37,15 kr. 33,05 kr. 31,41 kr. View 29,69 kr. 28,20 kr. 27,30 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1727J IXYS Integrated Circuits 1: 147,48 kr. 344In Stock End of Life	Mfr. Part No. CPC1727J Mouser Part No 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	147,48 kr. 141,14 kr. 119,88 kr. 104,89 kr. Quote Quote	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount 60V Single Pole 60V Power Relay CPC1909J IXYS Integrated Circuits 1: 134,80 kr. 479In Stock 325Expected 23/07/2027 End of Life	Mfr. Part No. CPC1909J Mouser Part No 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 23/07/2027	134,80 kr. 123,99 kr. 117,42 kr. 110,93 kr. View 106,90 kr. 102,05 kr. 98,55 kr.	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Triac & SCR Output Optocouplers 400V, 1mA AC Solid State Relay CPC1945G IXYS Integrated Circuits 1: 61,17 kr. 105In Stock End of Life	Mfr. Part No. CPC1945G Mouser Part No 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	61,17 kr. 47,37 kr. 38,27 kr. 35,14 kr. View 33,42 kr. 32,67 kr.	Min.: 1 Mult.: 1	Through Hole	DIP-16
Solid State Relays - PCB Mount 1000V Single Pole SIP Power Relay CPC1981Y IXYS Integrated Circuits 1: 52,74 kr. 355In Stock 2.925On Order End of Life	Mfr. Part No. CPC1981Y Mouser Part No 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	355In Stock 2.925On Order On Order Ship Dates Mfr. No: CPC1981Y Stock: 355 Can Dispatch Immediately On Order: 1.500 Expected 08/02/2027 1.425 Expected 12/02/2027 Factory Lead Time: 54 Weeks	52,74 kr. 48,27 kr. 44,31 kr. 42,37 kr. View 40,58 kr. 35,44 kr.	Min.: 1 Mult.: 1	PCB Mount	SIP-4	MOSFET
Solid State Relays - PCB Mount 120MA DPST 8-DIP LAA110 IXYS Integrated Circuits 1: 61,84 kr. 2.075In Stock 5.400On Order End of Life	Mfr. Part No. LAA110 Mouser Part No 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	2.075In Stock 5.400On Order On Order Ship Dates Mfr. No: LAA110 Stock: 2.075 Can Dispatch Immediately On Order: 2.800 Expected 15/07/2027 1.050 Expected 19/07/2027 1.550 Expected 23/07/2027 Factory Lead Time: 36 Weeks	61,84 kr. 56,70 kr. 52,00 kr. 49,68 kr. View 47,45 kr. 44,69 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110L IXYS Integrated Circuits 1: 60,28 kr. 94In Stock End of Life	Mfr. Part No. LAA110L Mouser Part No 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	60,28 kr. 53,79 kr. 51,32 kr. 49,53 kr. View 44,24 kr. 42,67 kr. 41,48 kr. 40,88 kr.	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125LS IXYS Integrated Circuits 1: 68,04 kr. 83In Stock End of Life	Mfr. Part No. LAA125LS Mouser Part No 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	68,04 kr. 63,78 kr. 56,70 kr. 53,86 kr. View 51,03 kr. 46,70 kr. 45,13 kr. 43,57 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127LS IXYS Integrated Circuits 1: 80,57 kr. 90In Stock End of Life	Mfr. Part No. LAA127LS Mouser Part No 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	80,57 kr. 71,62 kr. 68,04 kr. 64,45 kr. View 61,32 kr. 58,56 kr. 56,62 kr. 54,61 kr.	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127STR IXYS Integrated Circuits 1: 74,15 kr. 442In Stock End of Life	Mfr. Part No. LAA127STR Mouser Part No 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 74,15 kr. 66,10 kr. 63,11 kr. 60,95 kr. View Reel 52,22 kr. 58,71 kr. 56,02 kr. 54,09 kr. 52,22 kr. Quote MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-8	MOSFET

OptoMOS 1-Form-A (SPST-NO) Solid State Relays

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