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 350V 120mA LCA110L IXYS Integrated Circuits 1: 3,77 € 1 116In Stock End of Life	Mfr. Part No. LCA110L Mouser Part No 849-LCA110L 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	1 116In Stock	3,77 € 3,51 € 3,35 € 3,24 € View 3,13 € 2,92 € 2,80 € 2,73 € 2,47 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA120 IXYS Integrated Circuits 1: 5,65 € 2 469In Stock End of Life	Mfr. Part No. LCA120 Mouser Part No 849-LCA120 End of Life	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	2 469In Stock	5,65 € 5,30 € 4,71 € 4,47 € View 4,24 € 4,02 € 3,88 € 3,75 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120L IXYS Integrated Circuits 1: 5,34 € 85In Stock End of Life	Mfr. Part No. LCA120L Mouser Part No 849-LCA120L 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	85In Stock	5,34 € 5,31 € 4,72 € 4,47 € View 4,13 € 4,02 € 3,89 € 3,84 € 3,83 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120LS IXYS Integrated Circuits 1: 5,71 € 84In Stock End of Life	Mfr. Part No. LCA120LS Mouser Part No 849-LCA120LS 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	84In Stock	5,71 € 5,36 € 4,76 € 4,52 € View 3,94 € 3,85 € 3,77 € 3,70 € 3,68 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN SMT LCA120S IXYS Integrated Circuits 1: 5,38 € 53In Stock End of Life	Mfr. Part No. LCA120S Mouser Part No 849-LCA120S End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 6PIN SMT Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	53In Stock	5,38 € 4,80 € 4,58 € 4,42 € View 3,94 € 3,88 € 3,82 € 3,77 € 3,76 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 170mA LCA120STR IXYS Integrated Circuits 1: 5,49 € 1 433In Stock 2 000Expected 8/4/2027 End of Life	Mfr. Part No. LCA120STR Mouser Part No 849-LCA120STR 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	1 433In Stock 2 000Expected 8/4/2027	Cut Tape 5,49 € 5,14 € 4,57 € 4,34 € View Reel 3,64 € 4,11 € 3,90 € 3,77 € 3,64 € MouseReel Available	Min.: 1 Mult.: 1 : 1 000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127 IXYS Integrated Circuits 1: 6,56 € 1 921In Stock End of Life	Mfr. Part No. LCA127 Mouser Part No 849-LCA127 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 921In Stock	6,56 € 6,15 € 5,46 € 5,19 € View 4,92 € 4,61 € 4,45 € 4,30 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127S IXYS Integrated Circuits 1: 6,67 € 93In Stock End of Life	Mfr. Part No. LCA127S Mouser Part No 849-LCA127S 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	93In Stock	6,67 € 6,25 € 5,56 € 5,27 € View 5,00 € 4,69 € 4,52 € 4,37 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA182 IXYS Integrated Circuits 1: 4,59 € 150In Stock End of Life	Mfr. Part No. LCA182 Mouser Part No 849-LCA182 End of Life	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	150In Stock	4,59 € 4,31 € 3,83 € 3,68 € View 3,55 € 3,19 € 3,09 € 2,99 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA182STR IXYS Integrated Circuits 1: 4,47 € 3 383In Stock End of Life	Mfr. Part No. LCA182STR Mouser Part No 849-LCA182STR 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	3 383In Stock	Cut Tape 4,47 € 4,19 € 3,72 € 3,53 € View Reel 2,99 € 3,36 € 3,21 € 3,10 € 2,99 € MouseReel Available	Min.: 1 Mult.: 1 : 1 000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA710 IXYS Integrated Circuits 1: 8,59 € 23In Stock 10 050On Order	Mfr. Part No. LCA710 Mouser Part No 849-LCA710	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	23In Stock 10 050On Order On Order Ship Dates Mfr. No: LCA710 Stock: 23 Can Dispatch Immediately On Order: 5 150 Expected 11/2/2026 4 900 Expected 2/10/2027 Factory Lead Time: 35 Weeks	8,59 € 8,08 € 7,24 € 6,97 € View 6,73 € 6,43 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717 IXYS Integrated Circuits 1: 8,59 € 201In Stock 300Expected 11/2/2026	Mfr. Part No. LCA717 Mouser Part No 849-LCA717	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	201In Stock 300Expected 11/2/2026	8,59 € 7,65 € 7,31 € 7,05 € View 6,81 € 6,25 € 6,07 € 5,94 € Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay OMA160S IXYS Integrated Circuits 1: 5,76 € 72In Stock	Mfr. Part No. OMA160S Mouser Part No 849-OMA160S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single 1-Form-A 250V 50mA relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	72In Stock	5,76 € 5,13 € 5,12 € 4,85 € View 4,52 € 4,41 € 4,31 € 4,16 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP PAA193 IXYS Integrated Circuits 1: 10,35 € 91In Stock	Mfr. Part No. PAA193 Mouser Part No 849-PAA193	IXYS Integrated Circuits	Solid State Relays - PCB Mount DPST-NO/NO 6PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	91In Stock	10,35 € 9,70 € 8,63 € 8,19 € View 7,76 € 7,10 € 6,85 € 6,61 €	Min.: 1 Mult.: 1	PCB Mount	DIP-8	MOSFET
Solid State Relays - PCB Mount Dual 1-Form-A 600V 100mA SSR PAA193S IXYS Integrated Circuits 1: 9,41 € 153In Stock 50Expected 1/7/2027	Mfr. Part No. PAA193S Mouser Part No 849-PAA193S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 600V 100mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	153In Stock 50Expected 1/7/2027	9,41 € 8,39 € 8,01 € 7,73 € View 7,46 € 6,90 € 6,78 € 6,66 € Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110L IXYS Integrated Circuits 1: 7,15 € 61In Stock	Mfr. Part No. PLA110L Mouser Part No 849-PLA110L	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	61In Stock	7,15 € 6,70 € 5,95 € 5,66 € View 5,36 € 5,01 € 4,83 € 4,66 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP PLA110S IXYS Integrated Circuits 1: 6,98 € 45In Stock 250Expected 7/5/2027	Mfr. Part No. PLA110S Mouser Part No 849-PLA110S	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	45In Stock 250Expected 7/5/2027	6,98 € 6,54 € 5,82 € 5,53 € View 5,24 € 4,88 € 4,72 € 4,56 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 150mA PLA110STR IXYS Integrated Circuits 1: 6,35 € 108In Stock 3 000On Order	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	108In Stock 3 000On Order On Order Ship Dates Mfr. No: PLA110STR Stock: 108 Can Dispatch Immediately On Order: 1 000 Expected 1/27/2027 2 000 Expected 3/22/2027 Factory Lead Time: 36 Weeks	Cut Tape 6,35 € 6,22 € Reel 4,41 € MouseReel Available	Min.: 1 Mult.: 1 : 1 000	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132 IXYS Integrated Circuits 1: 8,08 € 113In Stock	Mfr. Part No. PLA132 Mouser Part No 849-PLA132	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	113In Stock	8,08 € 7,21 € 6,88 € 6,64 € View 6,60 € 6,05 € 5,86 € 5,78 € Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA PLA132S IXYS Integrated Circuits 1: 8,08 € 66In Stock	Mfr. Part No. PLA132S Mouser Part No 849-PLA132S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 60V 600mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	66In Stock	8,08 € 7,21 € 6,88 € 6,64 € View 6,41 € 6,08 € 5,61 € 5,55 € Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 400V 250mA PLA140L IXYS Integrated Circuits 1: 8,18 € 38In Stock 100Expected 6/3/2027	Mfr. Part No. PLA140L Mouser Part No 849-PLA140L	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	38In Stock 100Expected 6/3/2027	8,18 € 7,28 € 6,96 € 6,72 € View 6,37 € 6,20 € 6,11 € 6,02 € Quote	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170 IXYS Integrated Circuits 1: 6,12 € 10In Stock 400Expected 7/29/2027	Mfr. Part No. PLA170 Mouser Part No 849-PLA170	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	10In Stock 400Expected 7/29/2027	6,12 € 5,60 € 5,12 € 4,85 € View 4,60 € 4,15 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA PLA170S IXYS Integrated Circuits 1: 6,13 € 15In Stock 1 250On Order	Mfr. Part No. PLA170S Mouser Part No 849-PLA170S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 800V 100mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	15In Stock 1 250On Order On Order Ship Dates Mfr. No: PLA170S Stock: 15 Can Dispatch Immediately On Order: 700 Expected 11/16/2026 550 Expected 11/23/2026 Factory Lead Time: 36 Weeks	6,13 € 5,74 € 5,11 € 4,85 € View 4,60 € 4,33 €	Min.: 1 Mult.: 1	PCB Mount	SMD DIP-6	MOSFET
Solid State Relays - PCB Mount Single Pole 1-Form-A, 250V,250mA PLA171PTR IXYS Integrated Circuits 1: 6,48 € 132In Stock 1 000Expected 6/28/2027	Mfr. Part No. PLA171PTR Mouser Part No 849-PLA171PTR	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	132In Stock 1 000Expected 6/28/2027	Cut Tape 6,48 € 5,93 € 5,50 € 5,31 € View Reel 4,27 € 5,13 € 4,58 € 4,42 € 4,27 € MouseReel Available	Min.: 1 Mult.: 1 : 1 000	PCB Mount	SMD DIP-8	MOSFET
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 6,00 € 5,92 € 5,87 €	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET

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

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