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Updated: 06 Apr 2026

10 Best Optocouplers

#1 Best Pick
100PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler

100PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler

Brand: Rivermidfish AU
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  • 100PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler
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#2 Best Value
2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insulation Module (CH2)

2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insulation Module (CH2)

Brand: Senzooe
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  • 2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insulation Module
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#3 Budget Pick
Mellisso 50Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Mellisso 50Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Brand: Mellisso
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  • color:black
  • Material:metal
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#4 Top Choice
2 Channel Relay Module Optocoupler Isolation High Low Level Trigger Best for Smart Home System (24V)

2 Channel Relay Module Optocoupler Isolation High Low Level Trigger Best for Smart Home System (24V)

Brand: Domary
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  • [Flexible Triggering] Easily set high or low levels through wire jumper for customized control.
  • [Powerful Performance] Ac /10a, dc 30v/10a. trigger current at 5ma ensures operation.
  • [ Design] Equipped with fault-tolerant feature that prevents relay movement if control line is broken.
  • [User-friendly Interface] Humanized interface design allows for easy direct connection through terminals.
  • [Versatile Applications] for smart home automation systems, providing convenient and stable performance.
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#5 Popular Choice
2 Channel Relay Module Optocoupler Isolation High Low Level Trigger Best for Smart Home System (5V)

2 Channel Relay Module Optocoupler Isolation High Low Level Trigger Best for Smart Home System (5V)

Brand: Domary
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  • [Flexible Triggering] Easily set high or low levels through wire jumper for customized control.
  • [Powerful Performance] Ac /10a, dc 30v/10a. trigger current at 5ma ensures operation.
  • [ Design] Equipped with fault-tolerant feature that prevents relay movement if control line is broken.
  • [User-friendly Interface] Humanized interface design allows for easy direct connection through terminals.
  • [Versatile Applications] for smart home automation systems, providing convenient and stable performance.
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#6 Top Pick
2 Channel Relay Module Optocoupler Isolation High Low Level Trigger Best for Smart Home System (12V)

2 Channel Relay Module Optocoupler Isolation High Low Level Trigger Best for Smart Home System (12V)

Brand: Domary
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  • [Flexible Triggering] Easily set high or low levels through wire jumper for customized control.
  • [Powerful Performance] Ac /10a, dc 30v/10a. trigger current at 5ma ensures operation.
  • [ Design] Equipped with fault-tolerant feature that prevents relay movement if control line is broken.
  • [User-friendly Interface] Humanized interface design allows for easy direct connection through terminals.
  • [Versatile Applications] for smart home automation systems, providing convenient and stable performance.
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#7 Top Pick
100Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

100Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Brand: Lrocaoai
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  • color:black
  • Material:metal
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#8 Top Pick
Kaifucy 50Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Kaifucy 50Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Brand: Kaifucy
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  • color:black
  • Material:metal
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#9 Top Pick
Suesacy 50Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Suesacy 50Pcs PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER for Best

Brand: Suesacy
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#10 Top Pick
eMagTech 50PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler for Computer Terminals Timers Osciallators Dual Opamps Quad Opamp

eMagTech 50PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler for Computer Terminals Timers Osciallators Dual Opamps Quad Opamp

Brand: eMagTech
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  • Feature : Integrated circuits have the advantages of small size, light weight, small solder joints, long life, high reliability, and good performance.
  • Application : PC817 photocoupler is widely used in computer terminals, timers, osciallators, dual opamps, quad opamps, comperators, audio amplifiers, echo processors, current mode controllers, darlington arrays, voltage charge pump,etc.
  • Low input : Low input bias current, low input offset voltage and offset current. Common mode input voltage range, including ground.
  • Durable material : The chip is made of metal oxide semiconductor material, which has good thermal stability and long service life.
  • Package includes : 50pcs PC817C 2.54mm pitch 4-pin DIP-4 transistor output optocoupler.
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