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 (EUR) 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 Single-Pole Relay 400V 250mA PLA191 IXYS Integrated Circuits 1: €8.13 24In Stock	Mfr. Part No. PLA191 Mouser Part No 849-PLA191	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	24In Stock	€8.13 €7.25 €6.98 €6.80 View €6.04 €5.96 €5.92 Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA PLA192STR IXYS Integrated Circuits 1: €6.19 34In Stock 2,000Expected 26/07/2027	Mfr. Part No. PLA192STR Mouser Part No 849-PLA192STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	34In Stock 2,000Expected 26/07/2027	Cut Tape €6.19 €5.66 €5.25 €4.99 View Reel €4.11 €4.77 €4.53 €4.38 €4.11 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA193 IXYS Integrated Circuits 1: €5.53 51In Stock	Mfr. Part No. PLA193 Mouser Part No 849-PLA193	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	51In Stock	€5.53 €4.93 €4.89 €4.64 View €4.38 €3.94 €3.84 €3.78	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount 1-Form-A 100V 150mA Solid State Relay CPC1008NTR IXYS Integrated Circuits 1: €2.61 40In Stock 90,000On Order End of Life	Mfr. Part No. CPC1008NTR Mouser Part No 849-CPC1008NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 100V 150mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	40In Stock 90,000On Order On Order Ship Dates Mfr. No: CPC1008NTR Stock: 40 Can Dispatch Immediately On Order: 38,000 Expected 30/11/2026 52,000 Expected 18/02/2027 Factory Lead Time: 31 Weeks	Cut Tape €2.61 €2.52 Reel €2.52 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR CPC1009N IXYS Integrated Circuits 1: €2.90 204In Stock 7,900On Order End of Life	Mfr. Part No. CPC1009N Mouser Part No 849-CPC1009N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	204In Stock 7,900On Order On Order Ship Dates Mfr. No: CPC1009N Stock: 204 Can Dispatch Immediately On Order: 5,000 Expected 15/02/2027 2,900 Expected 22/03/2027 Factory Lead Time: 36 Weeks	€2.90 €2.59 €2.47 €2.38 View €2.30 €2.11 €2.00	Min.: 1 Mult.: 1	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay CPC1014NTR IXYS Integrated Circuits 1: €2.62 80In Stock 86,000On Order End of Life	Mfr. Part No. CPC1014NTR Mouser Part No 849-CPC1014NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 400mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	80In Stock 86,000On Order On Order Ship Dates Mfr. No: CPC1014NTR Stock: 80 Can Dispatch Immediately On Order: 38,000 Expected 13/01/2027 48,000 Expected 22/04/2027 Factory Lead Time: 29 Weeks	Cut Tape €2.62 €2.52 Reel €2.52 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay CPC1018NTR IXYS Integrated Circuits 1: €4.33 48In Stock 72,000On Order End of Life	Mfr. Part No. CPC1018NTR Mouser Part No 849-CPC1018NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	48In Stock 72,000On Order On Order Ship Dates Mfr. No: CPC1018NTR Stock: 48 Can Dispatch Immediately On Order: 22,000 Expected 09/12/2026 50,000 Expected 17/05/2027 Factory Lead Time: 29 Weeks	Cut Tape €4.33 €3.96 €3.64 €3.48 View Reel €2.89 €3.36 €3.21 €3.10 €2.99 €2.89 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4	MOSFET
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390G IXYS Integrated Circuits 1: €3.97 54In Stock 1,400On Order End of Life	Mfr. Part No. CPC1390G Mouser Part No 849-CPC1390G 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	54In Stock 1,400On Order On Order Ship Dates Mfr. No: CPC1390G Stock: 54 Can Dispatch Immediately On Order: 800 Expected 05/04/2027 600 Expected 09/08/2027 Factory Lead Time: 36 Weeks	€3.97 €3.59 €3.39 €3.27 View €2.95 €2.91	Min.: 1 Mult.: 1	PCB Mount	DIP-4	MOSFET
Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay CPC1393GR IXYS Integrated Circuits 1: €4.25 8In Stock End of Life	Mfr. Part No. CPC1393GR Mouser Part No 849-CPC1393GR 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	8In Stock	€4.25 €3.98 €3.54 €3.36 View €3.21 €3.06 €2.96	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-4	MOSFET
Solid State Relays - PCB Mount 600V 90mA Single OptoMOS Relay CPC1393GRTR IXYS Integrated Circuits 1: €4.06 281In Stock 14,000On Order End of Life	Mfr. Part No. CPC1393GRTR Mouser Part No 849-CPC1393GRTR 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	281In Stock 14,000On Order On Order Ship Dates Mfr. No: CPC1393GRTR Stock: 281 Can Dispatch Immediately On Order: 8,000 Expected 01/02/2027 6,000 Expected 09/08/2027 Factory Lead Time: 36 Weeks	Cut Tape €4.06 €3.99 €3.90 Reel €2.77 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	DIP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394GR IXYS Integrated Circuits 1: €4.09 2In Stock 600Expected 13/01/2027 End of Life	Mfr. Part No. CPC1394GR Mouser Part No 849-CPC1394GR 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	2In Stock 600Expected 13/01/2027	€4.09 €3.65 €3.48 €3.43 View €3.25 €3.07 €3.00	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-4	MOSFET
Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay CPC1510G IXYS Integrated Circuits 1: €6.05 9In Stock 1,050Expected 19/01/2028 End of Life	Mfr. Part No. CPC1510G Mouser Part No 849-CPC1510G 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	9In Stock 1,050Expected 19/01/2028	€6.05 €5.54 €5.10 €4.87 View €4.66 €4.14	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1540GSTR IXYS Integrated Circuits 1: €5.09 9In Stock End of Life	Mfr. Part No. CPC1540GSTR Mouser Part No 849-CPC1540GSTR 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	9In Stock	Cut Tape €5.09 €4.55 €4.28 €4.10 Reel €3.48 View €3.93 €3.74 €3.61 €3.25	Min.: 1 Mult.: 1 : 1,000	PCB Mount		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay CPC1560GSTR IXYS Integrated Circuits 1: €6.80 10In Stock End of Life	Mfr. Part No. CPC1560GSTR Mouser Part No 849-CPC1560GSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	10In Stock	Cut Tape €6.80 €6.37 €6.34 Reel €4.48 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount		MOSFET
Solid State Relays - PCB Mount RELAY, SS ICS CPC1561BTR IXYS Integrated Circuits 1: €9.76 187In Stock 1,000Expected 06/07/2027 End of Life	Mfr. Part No. CPC1561BTR Mouser Part No 849-CPC1561BTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY, SS ICS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	187In Stock 1,000Expected 06/07/2027	Cut Tape €9.76 €9.15 €8.14 €7.73 View Reel €6.24 €7.32 €6.70 €6.47 €6.24 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SOIC-16	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1709J IXYS Integrated Circuits 1: €15.85 13In Stock 9,850On Order End of Life	Mfr. Part No. CPC1709J Mouser Part No 849-CPC1709J 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	13In Stock 9,850On Order On Order Ship Dates Mfr. No: CPC1709J Stock: 13 Can Dispatch Immediately On Order: 6,750 Expected 31/05/2027 1,350 Expected 30/07/2027 1,750 Expected 02/08/2027 Factory Lead Time: 36 Weeks	€15.85 €14.10 €13.03 €12.58 €12.14	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1718J IXYS Integrated Circuits 1: €16.26 12In Stock End of Life	Mfr. Part No. CPC1718J Mouser Part No 849-CPC1718J 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	12In Stock	€16.26 €14.49 €13.83 €13.36 €12.87	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1786J IXYS Integrated Circuits 1: €23.50 43In Stock 75Expected 10/02/2028 End of Life	Mfr. Part No. CPC1786J Mouser Part No 849-CPC1786J 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	43In Stock 75Expected 10/02/2028	€23.50 €21.91 €20.76 €19.61 View €18.64 €17.80 €17.19	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1788J IXYS Integrated Circuits 1: €25.59 8In Stock 525On Order End of Life	Mfr. Part No. CPC1788J Mouser Part No 849-CPC1788J 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	8In Stock 525On Order On Order Ship Dates Mfr. No: CPC1788J Stock: 8 Can Dispatch Immediately On Order: 225 Expected 05/04/2027 300 Expected 18/11/2027 Factory Lead Time: 51 Weeks	€25.59 €22.34 €21.34 €20.61	Min.: 1 Mult.: 1	PCB Mount	i4-PAC	MOSFET
Solid State Relays - PCB Mount 100V Single Pole SIP Power Relay CPC1916Y IXYS Integrated Circuits 1: €11.64 19In Stock 1,400On Order End of Life	Mfr. Part No. CPC1916Y Mouser Part No 849-CPC1916Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 100V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	19In Stock 1,400On Order On Order Ship Dates Mfr. No: CPC1916Y Stock: 19 Can Dispatch Immediately On Order: 800 Expected 21/12/2026 600 Expected 31/12/2026 Factory Lead Time: 37 Weeks	€11.64 €10.17 €9.71 €9.37 €9.09	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264	MOSFET
Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch CPC1963G IXYS Integrated Circuits 1: €10.45 162In Stock End of Life	Mfr. Part No. CPC1963G Mouser Part No 849-CPC1963G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	162In Stock	€10.45 €9.31 €8.89 €8.57 View €8.26 €7.89 €7.35 €7.28 Quote	Min.: 1 Mult.: 1	PCB Mount		SCR
Solid State Relays - PCB Mount 400V Single Pole 400V Power Relay CPC1967J IXYS Integrated Circuits 1: €35.16 6In Stock 400On Order End of Life	Mfr. Part No. CPC1967J Mouser Part No 849-CPC1967J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 400V Single Pole 400V Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6In Stock 400On Order On Order Ship Dates Mfr. No: CPC1967J Stock: 6 Can Dispatch Immediately On Order: 75 Expected 13/01/2027 325 Expected 14/06/2027 Factory Lead Time: 54 Weeks	€35.16 €31.13 €29.64 €28.30	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay CPC1973Y IXYS Integrated Circuits 1: €8.82 116In Stock 100Expected 01/04/2027 End of Life	Mfr. Part No. CPC1973Y Mouser Part No 849-CPC1973Y End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 400V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	116In Stock 100Expected 01/04/2027	€8.82 €7.25 €6.48 €6.06 View €5.88 Quote	Min.: 1 Mult.: 1	Through Hole	Power SIP
Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay CPC1983B IXYS Integrated Circuits 1: €9.91 150In Stock End of Life	Mfr. Part No. CPC1983B Mouser Part No 849-CPC1983B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP-NO SS OptoMOS Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	150In Stock	€9.91 €9.29 €8.25 €7.83 View €6.79 €6.54 €6.43 €6.37	Min.: 1 Mult.: 1	PCB Mount		MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108 IXYS Integrated Circuits 1: €4.58 295In Stock End of Life	Mfr. Part No. LAA108 Mouser Part No 849-LAA108 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 100V 300mA Double Pole Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	295In Stock	€4.58 €4.09 €3.90 €3.76 View €3.61 €3.45 €3.33 €3.10 €3.09	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET