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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.
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA710STR IXYS Integrated Circuits 1: £7.53 4,817In Stock	Mfr. Part No. LCA710STR Mouser Part No 849-LCA710STR	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	4,817In Stock	Cut Tape £7.53 £7.06 £6.29 £5.97 View Reel £4.82 £5.66 £5.18 £4.99 £4.82 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715STR IXYS Integrated Circuits 1: £8.12 4,158In Stock 5,000Expected 16/06/2027	Mfr. Part No. LCA715STR Mouser Part No 849-LCA715STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4,158In Stock 5,000Expected 16/06/2027	Cut Tape £8.12 £7.23 £6.91 £6.67 View Reel £5.56 £6.44 £6.14 £5.93 £5.56 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP CPC1006NTR IXYS Integrated Circuits 1: £1.71 31,777In Stock End of Life	Mfr. Part No. CPC1006NTR Mouser Part No 849-CPC1006NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	31,777In Stock	Cut Tape £1.71 £1.61 £1.46 £1.41 Reel £1.20 View £1.36 £1.28 £1.26 £1.20 £1.11 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 250V, 1-Form-A SSR CPC1010NTR IXYS Integrated Circuits 1: £2.93 9,284In Stock 6,000Expected 24/05/2027 End of Life	Mfr. Part No. CPC1010NTR Mouser Part No 849-CPC1010NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V, 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	9,284In Stock 6,000Expected 24/05/2027	Cut Tape £2.93 £2.61 £2.50 £2.39 View Reel £2.05 £2.31 £2.21 £2.13 £2.06 £2.05 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 1-Form-A 100V 100mA Solid State Relay CPC1016N IXYS Integrated Circuits 1: £2.41 1,646In Stock End of Life	Mfr. Part No. CPC1016N Mouser Part No 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	1,646In Stock	£2.41 £2.26 £2.01 £1.94 View £1.87 £1.78 £1.72 £1.66	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPNO RELAY CPC1017N IXYS Integrated Circuits 1: £0.801 189,810In Stock 120,000Expected 12/05/2027 End of Life	Mfr. Part No. CPC1017N Mouser Part No 849-CPC1017N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPNO RELAY Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	189,810In Stock 120,000Expected 12/05/2027	£0.801	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A CPC1020N IXYS Integrated Circuits 1: £5.05 34,160In Stock End of Life	Mfr. Part No. CPC1020N Mouser Part No 849-CPC1020N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	34,160In Stock	£5.05 £4.50 £4.26 £4.08 View £3.89 £3.68 £3.34	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay CPC1020NTR IXYS Integrated Circuits 1: £4.55 107,781In Stock End of Life	Mfr. Part No. CPC1020NTR Mouser Part No 849-CPC1020NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	107,781In Stock	Cut Tape £4.55 £4.05 £3.88 £3.74 View Reel £3.20 £3.61 £3.44 £3.32 £3.25 £3.20 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025N IXYS Integrated Circuits 1: £2.44 7,390In Stock 400Expected 30/07/2027 End of Life	Mfr. Part No. CPC1025N Mouser Part No 849-CPC1025N 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	7,390In Stock 400Expected 30/07/2027	£2.44 £2.17 £2.07 £2.00 View £1.91 £1.82 £1.76 £1.70	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1230N IXYS Integrated Circuits 1: £2.82 1,753In Stock End of Life	Mfr. Part No. CPC1230N Mouser Part No 849-CPC1230N 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	1,753In Stock	£2.82 £2.58 £2.37 £2.28 View £2.19 £2.09 £2.03 £1.88 £1.82	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay CPC1230NTR IXYS Integrated Circuits 1: £2.61 2,649In Stock End of Life	Mfr. Part No. CPC1230NTR Mouser Part No 849-CPC1230NTR 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	2,649In Stock	Cut Tape £2.61 £2.44 £2.17 £2.08 View Reel £1.80 £2.01 £1.92 £1.85 £1.80 £1.80 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1708J IXYS Integrated Circuits 1: £14.47 527In Stock End of Life	Mfr. Part No. CPC1708J Mouser Part No 849-CPC1708J 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	527In Stock	£14.47 £12.89 £12.31 £11.88 View £11.48 £10.85 £10.48 £10.14	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 250V Single Pole DC Power Relay CPC1726Y IXYS Integrated Circuits 1: £6.30 572In Stock End of Life	Mfr. Part No. CPC1726Y Mouser Part No 849-CPC1726Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V Single Pole DC Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	572In Stock	£6.30 £5.90 £5.25 £4.98 View £4.72 £4.41 £4.26 £4.10	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay CPC1907B IXYS Integrated Circuits 1: £9.03 13,117In Stock 17,625Expected 12/02/2027 End of Life	Mfr. Part No. CPC1907B Mouser Part No 849-CPC1907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	13,117In Stock 17,625Expected 12/02/2027	£9.03 £8.03 £6.53 £6.31 View £6.12 £5.93 £5.89	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP, NO ISOPLUS-264 CPC1927J IXYS Integrated Circuits 1: £23.96 218In Stock End of Life	Mfr. Part No. CPC1927J Mouser Part No 849-CPC1927J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP, NO ISOPLUS-264 Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	218In Stock	£23.96 £21.43 £20.46 £19.76 View £19.01 £16.75	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay CPC1968J IXYS Integrated Circuits 1: £34.06 921In Stock 375Expected 30/11/2026 End of Life	Mfr. Part No. CPC1968J Mouser Part No 849-CPC1968J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	921In Stock 375Expected 30/11/2026	£34.06 £31.88 £28.97	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LSTR IXYS Integrated Circuits 1: £6.74 698In Stock End of Life	Mfr. Part No. LAA110LSTR Mouser Part No 849-LAA110LSTR 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	698In Stock	Cut Tape £6.74 £6.01 £5.74 £5.54 Reel £4.72 View £5.35 £5.07 £4.90 £4.37 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110STR IXYS Integrated Circuits 1: £3.06 11,199In Stock 4,000Expected 13/01/2027 End of Life	Mfr. Part No. LCA110STR Mouser Part No 849-LCA110STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	11,199In Stock 4,000Expected 13/01/2027	Cut Tape £3.06 £2.72 £2.60 £2.51 Reel £2.09 View £2.43 £2.31 £2.23 £2.03 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127STR IXYS Integrated Circuits 1: £5.54 1,404In Stock End of Life	Mfr. Part No. LCA127STR Mouser Part No 849-LCA127STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,404In Stock	Cut Tape £5.54 £5.19 £4.62 £4.38 View Reel £3.63 £4.16 £3.89 £3.76 £3.63 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 8-Pin Power SOIC CPC1966B IXYS Integrated Circuits 1: £7.38 1,905In Stock 1,725Expected 24/03/2027	Mfr. Part No. CPC1966B Mouser Part No 849-CPC1966B	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8-Pin Power SOIC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,905In Stock 1,725Expected 24/03/2027	£7.38 £6.57 £6.27 £6.05 View £5.83 £5.46 £5.34 £5.21	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount AC Switch 3A, 600V CPC1966Y IXYS Integrated Circuits 1: £6.46 456In Stock 7,650Expected 23/11/2026	Mfr. Part No. CPC1966Y Mouser Part No 849-CPC1966Y	IXYS Integrated Circuits	Solid State Relays - PCB Mount AC Switch 3A, 600V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	456In Stock 7,650Expected 23/11/2026	£6.46 £5.75 £5.33 £5.30 £5.13	Min.: 1 Mult.: 1
Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay CPC1976Y IXYS Integrated Circuits 1: £5.81 946In Stock 5,975On Order	Mfr. Part No. CPC1976Y Mouser Part No 849-CPC1976Y	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	946In Stock 5,975On Order On Order Ship Dates Mfr. No: CPC1976Y Stock: 946 Can Dispatch Immediately On Order: 1,750 Expected 22/10/2026 4,225 Expected 08/01/2027 Factory Lead Time: 23 Weeks	£5.81 £4.78 £4.16 £3.90	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA712S IXYS Integrated Circuits 1: £8.60 283In Stock	Mfr. Part No. LCA712S Mouser Part No 849-LCA712S	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	283In Stock	£8.60 £7.64 £7.26 £6.88 View £6.55 £6.25 £6.03 £5.82	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715 IXYS Integrated Circuits 1: £9.00 833In Stock	Mfr. Part No. LCA715 Mouser Part No 849-LCA715	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	833In Stock	£9.00 £8.01 £7.63 £7.29 View £6.99 £6.68 £6.45 £6.22 Quote	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717STR IXYS Integrated Circuits 1: £7.80 812In Stock 2,000Expected 15/07/2027	Mfr. Part No. LCA717STR Mouser Part No 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 15/07/2027	Cut Tape £7.80 £7.32 £6.50 £6.18 View Reel £4.99 £5.86 £5.35 £5.18 £4.99 MouseReel Available	Min.: 1 Mult.: 1 : 1,000