Optocouplers/Photocouplers – Mouser United Kingdom

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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 (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Number of Channels	Output Type
Solid State Relays - PCB Mount 1-Form-A 100V 300mA Solid State Relay CPC1004NTR IXYS Integrated Circuits 1: £2.73 8,186On Order End of Life	Mfr. Part No. CPC1004NTR Mouser Part No 849-CPC1004NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 100V 300mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	8,186On Order On Order Ship Dates Mfr. No: CPC1004NTR Stock: 0 On Order: 2,186 Expected 13/01/2027 6,000 Expected 30/07/2027 Factory Lead Time: 36 Weeks	Cut Tape £2.73 £2.49 £2.30 £2.22 View Reel £1.80 £2.14 £2.04 £1.97 £1.90 £1.80 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1225NTR IXYS Integrated Circuits 1: £2.68 9,920Expected 12/08/2027 End of Life	Mfr. Part No. CPC1225NTR Mouser Part No 849-CPC1225NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	9,920Expected 12/08/2027	Cut Tape £2.68 £2.65 Reel £1.81 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 CPC1560GS IXYS Integrated Circuits 1: £6.28 3,298On Order End of Life	Mfr. Part No. CPC1560GS Mouser Part No 849-CPC1560GS 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	3,298On Order On Order Ship Dates Mfr. No: CPC1560GS Stock: 0 On Order: 998 Expected 08/12/2027 1,300 Expected 09/12/2027 1,000 Expected 29/12/2027 Factory Lead Time: 54 Weeks	£6.28 £5.88 £5.23 £4.97 View £4.71 £4.39	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1978J IXYS Integrated Circuits 1: £19.13 860On Order End of Life	Mfr. Part No. CPC1978J Mouser Part No 849-CPC1978J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	860On Order On Order Ship Dates Mfr. No: CPC1978J Stock: 0 On Order: 535 Expected 13/01/2027 325 Expected 31/03/2027 Factory Lead Time: 54 Weeks	£19.13 £17.58 £16.66 £15.74	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		MOSFET
Solid State Relays - PCB Mount SPST iso PLUS-264 CPC1979J IXYS Integrated Circuits 1: £30.20 6,034On Order End of Life	Mfr. Part No. CPC1979J Mouser Part No 849-CPC1979J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST iso PLUS-264 Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6,034On Order On Order Ship Dates Mfr. No: CPC1979J Stock: 0 On Order: 5,809 Expected 10/12/2027 225 Expected 16/12/2027 Factory Lead Time: 73 Weeks	£30.20 £27.00 £25.74 £24.80	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		MOSFET
Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation CPC1983Y IXYS Integrated Circuits 1: £8.06 7,435On Order End of Life	Mfr. Part No. CPC1983Y Mouser Part No 849-CPC1983Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,435On Order On Order Ship Dates Mfr. No: CPC1983Y Stock: 0 On Order: 5,510 Expected 29/07/2027 1,925 Expected 05/08/2027 Factory Lead Time: 40 Weeks	£8.06 £7.38 £6.78 £6.49 View £6.10 £5.82	Min.: 1 Mult.: 1	PCB Mount	SIP-4		MOSFET
Solid State Relays - PCB Mount RELAY, SS ICS CPC1983YE IXYS Integrated Circuits 1: £8.22 12,866On Order End of Life	Mfr. Part No. CPC1983YE Mouser Part No 849-CPC1983YE 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	12,866On Order On Order Ship Dates Mfr. No: CPC1983YE Stock: 0 On Order: 7,016 Expected 18/11/2026 5,850 Expected 29/01/2027 Factory Lead Time: 37 Weeks	£8.22 £7.65 £7.00 £6.76 View £6.52 £6.23	Min.: 1 Mult.: 1	PCB Mount	SIP-4		MOSFET
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108STR IXYS Integrated Circuits 1: £4.00 7,000On Order End of Life	Mfr. Part No. LAA108STR Mouser Part No 849-LAA108STR 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	7,000On Order On Order Ship Dates Mfr. No: LAA108STR Stock: 0 On Order: 5,000 Expected 28/07/2027 2,000 Expected 30/07/2027 Factory Lead Time: 36 Weeks	Cut Tape £4.00 £3.61 £3.33 £3.16 View Reel £2.64 £3.01 £2.87 £2.78 £2.64 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8		MOSFET
Triac & SCR Output Optocouplers AC SS Power Switch Dual Power SCR Out CPC1976YX6 IXYS Integrated Circuits 1: £7.96 455Expected 22/02/2027	Mfr. Part No. CPC1976YX6 Mouser Part No 849-CPC1976YX6	IXYS Integrated Circuits	Triac & SCR Output Optocouplers AC SS Power Switch Dual Power SCR Out Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	455Expected 22/02/2027	£7.96 £6.50 £5.62 £5.28	Min.: 1 Mult.: 1	Through Hole		1 Channel	PhotoSCR
Solid State Relays - PCB Mount 1-Form-A SSR LCA701 IXYS Integrated Circuits 1: £8.92 707On Order	Mfr. Part No. LCA701 Mouser Part No 849-LCA701	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	707On Order On Order Ship Dates Mfr. No: LCA701 Stock: 0 On Order: 107 Expected 16/11/2026 600 Expected 15/07/2027 Factory Lead Time: 36 Weeks	£8.92 £7.84 £7.47 £7.14 View £6.81 £6.09	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710R IXYS Integrated Circuits 1: £7.50 946Expected 02/12/2026	Mfr. Part No. LCA710R Mouser Part No 849-LCA710R	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	946Expected 02/12/2026	£7.50 £7.05 £6.32 £6.01 View £5.76 £5.50	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA712STR IXYS Integrated Circuits 1: £8.44 Lead-Time 36 Weeks	Mfr. Part No. LCA712STR Mouser Part No 849-LCA712STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Lead-Time 36 Weeks	Cut Tape £8.44 £7.53 £7.18 £6.92 View Reel £5.63 £6.63 £6.20 £5.98 £5.63 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount			MOSFET
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717S IXYS Integrated Circuits 1: £8.20 2,080Expected 23/10/2026	Mfr. Part No. LCA717S Mouser Part No 849-LCA717S	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	2,080Expected 23/10/2026	£8.20 £7.68 £6.83 £6.49 View £6.15 £5.61 £5.43 £5.24	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA110 IXYS Integrated Circuits 1: £10.75 485On Order	Mfr. Part No. PAA110 Mouser Part No 849-PAA110	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	485On Order On Order Ship Dates Mfr. No: PAA110 Stock: 0 On Order: 85 Expected 13/01/2027 400 Expected 17/05/2027 Factory Lead Time: 35 Weeks	£10.75 £9.55 £9.08 £8.44 £8.15	Min.: 1 Mult.: 1	PCB Mount	DIP-8		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150 IXYS Integrated Circuits 1: £10.68 192On Order	Mfr. Part No. PAA150 Mouser Part No 849-PAA150	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	192On Order On Order Ship Dates Mfr. No: PAA150 Stock: 0 On Order: 92 Expected 24/05/2027 100 Expected 19/07/2027 Factory Lead Time: 36 Weeks	£10.68 £9.50 £9.04 £8.56 £8.28	Min.: 1 Mult.: 1	PCB Mount	DIP-8		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA191S IXYS Integrated Circuits 1: £10.99 712Expected 08/02/2027	Mfr. Part No. PAA191S Mouser Part No 849-PAA191S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	712Expected 08/02/2027	£10.99 £9.80 £9.36 £9.02 View £8.71 £8.31	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110STR IXYS Integrated Circuits 1: £5.54 2,996Expected 08/02/2027	Mfr. Part No. PLA110STR Mouser Part No 849-PLA110STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,996Expected 08/02/2027	Cut Tape £5.54 £5.43 Reel £3.85 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA PLA192S IXYS Integrated Circuits 1: £5.32 1,825Expected 08/02/2027	Mfr. Part No. PLA192S Mouser Part No 849-PLA192S	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	1,825Expected 08/02/2027	£5.32 £4.74 £4.53 £4.37 View £4.22 £4.03	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR CPC1009NTR IXYS Integrated Circuits 1: £2.28 7,741On Order End of Life	Mfr. Part No. CPC1009NTR Mouser Part No 849-CPC1009NTR 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	7,741On Order On Order Ship Dates Mfr. No: CPC1009NTR Stock: 0 On Order: 5,741 Expected 24/05/2027 2,000 Expected 02/08/2027 Factory Lead Time: 36 Weeks	Cut Tape £2.28 £2.07 £1.90 £1.85 View Reel £1.48 £1.79 £1.71 £1.63 £1.48 £1.48 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1030N IXYS Integrated Circuits 1: £2.96 1,817Expected 19/04/2027 End of Life	Mfr. Part No. CPC1030N Mouser Part No 849-CPC1030N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,817Expected 19/04/2027	£2.96 £2.64 £2.52 £2.43 View £2.33 £2.22 £2.16 £2.08	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay CPC1030NTR IXYS Integrated Circuits 1: £2.86 3,731Expected 08/03/2027 End of Life	Mfr. Part No. CPC1030NTR Mouser Part No 849-CPC1030NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,731Expected 08/03/2027	Cut Tape £2.86 £2.62 £2.41 £2.33 View Reel £1.96 £2.23 £2.13 £2.07 £1.99 £1.96 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390GR IXYS Integrated Circuits 1: £3.43 600On Order End of Life	Mfr. Part No. CPC1390GR Mouser Part No 849-CPC1390GR 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	600On Order On Order Ship Dates Mfr. No: CPC1390GR Stock: 0 On Order: 500 Expected 04/11/2026 100 Expected 02/12/2026 Factory Lead Time: 36 Weeks	£3.43 £3.09 £2.89 £2.77 View £2.65 £2.54	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394G IXYS Integrated Circuits 1: £3.75 500Expected 03/02/2027 End of Life	Mfr. Part No. CPC1394G Mouser Part No 849-CPC1394G 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	500Expected 03/02/2027	£3.75 £3.43 £3.22 £3.11 View £3.00 £2.85 £2.77	Min.: 1 Mult.: 1	PCB Mount	DIP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay CPC1510GS IXYS Integrated Circuits 1: £5.21 2,502On Order End of Life	Mfr. Part No. CPC1510GS Mouser Part No 849-CPC1510GS 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	2,502On Order On Order Ship Dates Mfr. No: CPC1510GS Stock: 0 On Order: 1,752 Expected 14/01/2027 750 Expected 26/04/2027 Factory Lead Time: 61 Weeks	£5.21 £4.57 £4.36 £4.21 View £4.06 £3.88	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1563GS IXYS Integrated Circuits 1: £5.01 1,100Expected 15/04/2027 End of Life	Mfr. Part No. CPC1563GS Mouser Part No 849-CPC1563GS 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	1,100Expected 15/04/2027	£5.01 £4.58 £4.22 £4.00 View £3.86 £3.68	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6		MOSFET

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