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 250V 200mA Dual Single-Pole LAA127STR IXYS Integrated Circuits 1: 9,94 € 442In Stock End of Life	Mfr. Part No. LAA127STR Mouser Part No 849-LAA127STR 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	442In Stock	Cut Tape 9,94 € 8,86 € 8,46 € 8,17 € View Reel 6,97 € 7,84 € 7,48 € 7,23 € 6,97 € MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount SPST-NO 6PIN DIP LCA120 IXYS Integrated Circuits 1: 5,65 € 2.459In 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	2.459In 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 4,22 € 4,14 € 4,08 € 4,01 € 3,99 €	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 4,03 € 3,96 € 3,89 € 3,82 € 3,80 €	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: 5,19 € 1.433In Stock 2.000Expected 04/08/2027 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 04/08/2027	Cut Tape 5,19 € 4,63 € 4,42 € 4,27 € Reel 3,65 € View 4,12 € 3,92 € 3,78 € 3,53 € 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: 6,14 € 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	6,14 € 5,47 € 5,23 € 5,04 € View 4,87 € 4,63 € 4,47 € 4,32 €	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: 4,39 € 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	4,39 € 3,91 € 3,74 € 3,55 € View 3,41 € 3,25 € 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: 4,28 € 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 4,28 € 3,82 € 3,65 € 3,53 € Reel 3,01 € View 3,39 € 3,23 € 3,12 € 2,92 € 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: 8,57 € 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 02/11/2026 4.900 Expected 10/02/2027 Factory Lead Time: 35 Weeks	8,57 € 8,05 € 7,22 € 6,86 € View 6,60 € 6,30 €	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 02/11/2026	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 02/11/2026	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: 9,41 € 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	9,41 € 8,39 € 8,01 € 7,73 € View 7,46 € 7,11 € 6,50 € 6,40 €	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 07/01/2027	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 07/01/2027	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: 6,65 € 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	6,65 € 5,93 € 5,66 € 5,46 € View 5,27 € 4,78 € 4,72 € 4,67 € 4,65 €	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 05/07/2027	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 05/07/2027	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 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 € 5,94 € 5,88 € 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 03/06/2027	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 03/06/2027	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 29/07/2027	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 29/07/2027	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: 6,14 € 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 16/11/2026 550 Expected 23/11/2026 Factory Lead Time: 36 Weeks	6,14 € 5,75 € 4,92 € 4,74 € View 4,58 € 4,37 €	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 28/06/2027	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 28/06/2027	Cut Tape 6,48 € 5,93 € 5,50 € 5,31 € View Reel 4,37 € 5,13 € 4,72 € 4,56 € 4,37 € MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-8	MOSFET
Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay PLA172PTR IXYS Integrated Circuits 1: 8,33 € 79In Stock	Mfr. Part No. PLA172PTR Mouser Part No 849-PLA172PTR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 800V Normally-Open 6-Pin OptoMOS Relay Learn More about IXYS Integrated Circuits ixys pla172p relays	Datasheet	79In Stock	Cut Tape 8,33 € 7,43 € 7,10 € 6,85 € Reel 5,78 € View 6,62 € 6,29 € 6,07 € 5,77 € MouseReel Available	Min.: 1 Mult.: 1 : 1.000	PCB Mount	SMD DIP-6	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 6,04 € 5,96 € 5,92 € Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-6	MOSFET

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

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