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 (USD) 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 60V, 1A, Single Pole, Normally Open Current Limiting Relay CPC1561B IXYS Integrated Circuits 1: $14.09 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # CPC1561B Mouser Part # 849-CPC1561B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 60V, 1A, Single Pole, Normally Open Current Limiting Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$14.09 $12.56 $11.99 $11.57 View $11.17 $9.89	Min.: 1 Mult.: 1	PCB Mount	SOIC-16	MOSFET
Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch CPC1943G IXYS Integrated Circuits 1: $19.51 Non-Stocked Lead-Time 43 Weeks End of Life	Mfr. Part # CPC1943G Mouser Part # 849-CPC1943G End of Life	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 400V, 500mA AC Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 43 Weeks	$19.51	Min.: 1 Mult.: 1	Through Hole	DIP-6
Solid State Relays - PCB Mount 600V 0.2mA AC Power Switch CPC1961G IXYS Integrated Circuits 1: $6.06 Non-Stocked Lead-Time 23 Weeks End of Life	Mfr. Part # CPC1961G Mouser Part # 849-CPC1961G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V 0.2mA AC Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 23 Weeks	$6.06 $5.67 $5.04 $4.78 View $4.59 $4.38 $4.23 $4.08	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 600V 0.2mA AC Power Switch CPC1961GS IXYS Integrated Circuits 1: $6.06 Non-Stocked Lead-Time 23 Weeks End of Life	Mfr. Part # CPC1961GS Mouser Part # 849-CPC1961GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V 0.2mA AC Power Switch Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 23 Weeks	$6.06 $5.67 $5.04 $4.78 View $4.59 $4.38 $4.23 $4.08	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 600V, 0.5mA AC Power Switch CPC1963GS IXYS Integrated Circuits 1: $16.56 Non-Stocked Lead-Time 47 Weeks End of Life	Mfr. Part # CPC1963GS Mouser Part # 849-CPC1963GS 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	Non-Stocked Lead-Time 47 Weeks	$16.56 $14.74 $14.05 $13.43 View $12.87 $11.34	Min.: 1 Mult.: 1	PCB Mount		SCR
Solid State Relays - PCB Mount AC Switch w/ Dual Power Outputs CPC1964B IXYS Integrated Circuits Non-Stocked Lead-Time 23 Weeks	Mfr. Part # CPC1964B Mouser Part # 849-CPC1964B	IXYS Integrated Circuits	Solid State Relays - PCB Mount AC Switch w/ Dual Power Outputs Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 23 Weeks		Request a Quote	PCB Mount		SCR
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA100 IXYS Integrated Circuits 1: $13.79 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA100 Mouser Part # 849-LAA100 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	Non-Stocked Lead-Time 36 Weeks	$13.79 $12.92 $11.49 $10.91 View $10.34 $9.46	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA100LS IXYS Integrated Circuits 1: $13.38 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA100LS Mouser Part # 849-LAA100LS 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	Non-Stocked Lead-Time 36 Weeks	$13.38 $12.23 $11.26 $10.76 View $10.30 $9.69	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA100LSTR IXYS Integrated Circuits 1: $12.75 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA100LSTR Mouser Part # 849-LAA100LSTR 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	Non-Stocked Lead-Time 36 Weeks	Cut Tape $12.75 $12.34 $12.21 Reel $8.63 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120L IXYS Integrated Circuits 1: $13.81 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA120L Mouser Part # 849-LAA120L End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$13.81 $12.94 $11.51 $10.91 $9.93	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole LAA120LS IXYS Integrated Circuits 1: $13.81 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA120LS Mouser Part # 849-LAA120LS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V 170mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$13.81 $12.94 $11.51 $10.91 $9.93	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 350V 170mA Dual Single-Pole LAA125L IXYS Integrated Circuits 1: $12.64 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA125L Mouser Part # 849-LAA125L 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	Non-Stocked Lead-Time 36 Weeks	$12.64 $11.27 $10.76 $10.37 View $10.02 $9.40	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127L IXYS Integrated Circuits 1: $15.73 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA127L Mouser Part # 849-LAA127L 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	Non-Stocked Lead-Time 36 Weeks	$15.73 $14.03 $13.39 $12.92	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount 250V 200mA Dual Single-Pole LAA127LSTR IXYS Integrated Circuits 1: $15.56 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LAA127LSTR Mouser Part # 849-LAA127LSTR 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	Non-Stocked Lead-Time 36 Weeks	Cut Tape $15.56 $13.83 $13.14 $12.45 View Reel $10.54 $11.86 $11.31 $10.93 $10.54 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA100 IXYS Integrated Circuits 1: $8.23 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA100 Mouser Part # 849-LCA100 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	Non-Stocked Lead-Time 36 Weeks	$8.23 $7.71 $6.85 $6.50 View $6.16 $5.85	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA100LS IXYS Integrated Circuits 1: $8.07 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA100LS Mouser Part # 849-LCA100LS 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	Non-Stocked Lead-Time 36 Weeks	$8.07 $7.19	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA100LSTR IXYS Integrated Circuits 1: $8.15 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA100LSTR Mouser Part # 849-LCA100LSTR 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	Non-Stocked Lead-Time 36 Weeks	Cut Tape $8.15 $7.64 $6.79 $6.45 View Reel $5.40 $6.11 $5.80 $5.60 $5.40 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA100STR IXYS Integrated Circuits 1: $7.64 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA100STR Mouser Part # 849-LCA100STR 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	Non-Stocked Lead-Time 36 Weeks	Cut Tape $7.64 $7.45 $7.44 Reel $5.27 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120LSTR IXYS Integrated Circuits 1: $8.32 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA120LSTR Mouser Part # 849-LCA120LSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	Cut Tape $8.32 $7.41 $7.01 $6.71 View Reel $5.55 $6.42 $6.11 $5.90 $5.55 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA LCA125L IXYS Integrated Circuits 1: $10.15 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA125L Mouser Part # 849-LCA125L End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$10.15 $9.52 $8.46 $8.03 View $7.62 $7.15	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A,300V,170mA LCA125LS IXYS Integrated Circuits 1: $10.17 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA125LS Mouser Part # 849-LCA125LS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A,300V,170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$10.17 $9.53 $8.48 $8.03 $7.46	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6
Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA LCA125S IXYS Integrated Circuits 1: $10.00 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA125S Mouser Part # 849-LCA125S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 300V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$10.00 $9.37 $8.33 $7.92 View $7.50 $7.03	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127L IXYS Integrated Circuits 1: $10.24 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA127L Mouser Part # 849-LCA127L 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	Non-Stocked Lead-Time 36 Weeks	$10.24 $9.59 $8.53 $8.10 View $7.67 $7.16	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA129 IXYS Integrated Circuits 1: $7.50 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA129 Mouser Part # 849-LCA129 End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$7.50 $7.02 $6.24 $5.93 View $5.62 $5.36	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA129S IXYS Integrated Circuits 1: $7.07 Non-Stocked Lead-Time 36 Weeks End of Life	Mfr. Part # LCA129S Mouser Part # 849-LCA129S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	Non-Stocked Lead-Time 36 Weeks	$7.07 $6.72 $6.38 $5.92 $5.67	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET