Best Optocouplers 2026

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Last Updated - 22.07.2026

Best Choice

01

Waveshare

Industrial ESP32-S3 Control Board With RS485 And CAN Communication Interfaces, Supports Wi-Fi/Bluetooth/RS485/CAN and other Interfaces,Built-in ower Isolation and Optocoupler Isolation Circuits

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9.8

Exceptional

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Supports Arduino Development.Comprehensive SDK, Dev Resources, And Tutorials To Help You Easily Get Started
Onboard Multiple Isolation Protection Circuit.Multiple Protections, More Safe And Reliable
Based On ESP32-S3, Designed For AIoT Market.Equipped With Xtensa 32-Bit LX7 Dual-Core Processor, Capable Of Running At 240 MHz, With Powerful AI Computing Performance And Security Encryption Mechanism; Integrated 2.4GHz Wi-Fi And Bluetooth 5 (LE) Dual-Mode Wireless Communication
Application Scenario.Allows Users To Access The Relevant Webpage Via A Mobile Phone Or PC Browser To Control The Device And Send Data
Application Examples.Provides Demo Code For IoT Connectivity By Integrating Communication Interfaces With A Web Page, Enabling Data Visualization Services

27,99 €
02

DONGKER

Optocoupler Insulation Module, 8-Channel Optocoupler Insulation Module, 24 V to 3.3 V Level Voltage Converter PNP Output PLC Signal Optocoupler Voltage Insulation Board

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9.5

Excellent

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SHOP WITH CONFIDENCE: To provide you with the highest quality service, please feel free to contact us if you have any questions. We provide after-sales service until you are satisfied.
Optocoupler.
Conversion frequency limit: 20 kHz.
Applications: for signal separation; MCUs and PLC level conversion of signals; converting PNP, NPN signals into PNP signals; signal level voltage conversion
Appearance size: 85 x 98 x 18 mm.

16,99 €
Value for Money

03

Hailege

Hailege 2pcs PC817 8 Channel Optocoupler Insulation Module 817 Voltage Insulation Voltage Converter Module 3.6-30V Light Cabinet Insulated Module (2/4/8 Channel Optional)

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9.3

Excellent

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We offer the declaration of conformity. This product also includes an electronic user manual available in English, German, French, Spanish, Italian, Polish and Dutch. If you need support, please contact us.
The jumper cap allows you to determine whether the output port is a high or low output.
Pack of 2, which means you will receive two same units in one type, not two mixed types.
PC817 Optocoupler Insulation Board 2/4/8 Channel 817 Voltage Isolation Module
Each channel of the PC817 optocoupler insulation board is independent and can control different voltages at the same time

8,49 €
04

RUNCCI-YUN

RUNCCI-YUN 60pcs PC817 2.54mm Pitch 4 Pin DIY DIP-4 Optocoupler

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9.2

Excellent

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Pin spacing: 2.54 mm, peak forward current strength: 1A
Pack of 60 optocouplers, DIP-4, PC817C.
Optocoupler output form: optical transistor
Number of pins: 4 pins
High insulation voltage: 5000 V (effective value)

6,99 €
05

Hailege

Hailege 2pcs PC817 2-Channel Optocoupler Insulation Module 817 Voltage Insulation Voltage Converter Module 3.6-30V Photoelectric Insulated Module (2/4/8 Channel Optional)

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

We offer the declaration of conformity. This product also includes an electronic user manual available in English, German, French, Spanish, Italian, Polish and Dutch. If you need support, please contact us.
The jumper cap allows you to determine whether the output port is a high or low output.
Pack of 2, which means you will receive two same units in one type, not two mixed types.
PC817 Optocoupler Insulation Board 2/4/8 Channel 817 Voltage Isolation Module
Each channel of the PC817 optocoupler insulation board is independent and can control different voltages at the same time

5,99 €
06

Jadeshay

8 Channel Optocoupler Insulation Board Module 817 3.6-30V Optoelectronic Insulated Module Optocoupler Insulation Board

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8.7

Very Good

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Versatile drivability: The optical insulation of the board provides strong interference resistance, so it can control high-performance transistors, MOS tubes and other high voltage devices. It can also directly drive 24V low power relay, making it an ideal solution for a variety of driving needs.
Multiple channels for simultaneous control: The 817's 8 channels on the board are independent of each other, which allows users to control different voltages or other parameters at the same time. This feature makes the card the ideal choice for complex applications requiring multiple control channels.
High-quality PCB: The 8-channel optocoupler insulation board is made of high-quality PCB materials, which are characterised by reliability, miniaturisation, good maintenance and interchangeability. This ensures consistent, long-lasting performance and makes it easy to integrate the board into your designs.
Flexible output options: the optocoupler insulation module comes with a jumper hat that allows users to choose between high-flat output or pull-down output as needed. This feature provides greater flexibility and versatility in terms of using the board.
Compatibility of the control interface voltage: the voltage converter adapter module is compatible with a 3.3 V or 5 V control interface with a voltage level of 3.6 - 24 V. It also turns on the controlled terminal, making it easier to use in a variety of applications.

7,19 €
07

JZK

JZK PC817 4-Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Insulated Module PC 817

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8.6

Very Good

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This module is used when isolated control and voltage conversion are required in practice.
The optical insulation has strong anti-interference ability. The latter can control high-performance three-tubes, MOS tubes and other occasions that require high voltage control, and can also directly drive 24V low power relay to work.
Module parameters: driver signal voltage: 3.6-24V Output voltage range: 3.6V-30V. The 4 channels of the 817 on the board are independent, which can realize simultaneous control of different voltages. Board Size: 48mm x 38mm; Hole Distance Long Side: 42mm; Wide Side Hole Spacing: 32mm
It can realise a 3.3 V or 5 V control interface with a voltage level of 3.6 V - 24 V. After the control terminal has been turned on, the controlled terminal is also switched on
If it is a pulse signal, please note that the limit of 817 is below 4 kHz. Please do not use this module for control signals greater than 4 kHz, as it does not work properly.

4,79 €
08

DONGKER

Optocoupler Isolation Board 4 Channel 3.3V to 24V Optocoupler Isolator PLC Signal Converter Board PLC Signal Converter Board

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8.5

Good

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Signal Level Voltage Converter
SHOP WITH CONFIDENCE: To provide you with the highest quality service, please feel free to contact us if you have any questions. We offer you customer service until you are satisfied.
PNP/NPN signal to NPN signal
PLC signal level conversion
It can be used for signal isolation

13,99 €
09

Hailege

Hailege 2pcs PC817 4-Channel Optocoupler Insulation Module 817 Voltage Isolation Voltage Converter Module 3.6-30V Photoelectric Insulated Module (2/4/8 Channel Optional)

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8.2

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

We offer the declaration of conformity. This product also includes an electronic user manual available in English, German, French, Spanish, Italian, Polish and Dutch. If you need support, please contact us.
The jumper cap allows you to determine whether the output port is a high or low output.
Pack of 2, which means you will receive two same units in one type, not two mixed types.
PC817 Optocoupler Insulation Board 2/4/8 Channel 817 Voltage Isolation Module
Each channel of the PC817 optocoupler insulation board is independent and can control different voltages at the same time

6,49 €
10

Hailege

Hailege AC 220V Optocoupler Module (8 Channel) AC Optocoupler AC Detection Module 3-5V or PLC 24V Level Power Supply for SPS MCU

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8.0

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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We offer the declaration of conformity. This product also includes an electronic user manual available in English, German, French, Spanish, Italian, Polish and Dutch. If you need support, please contact us.
One/three/eight channel optional, please choose the channel you need freely.
It is mainly used for the detection of 220 V AC
It can be powered by 3-5V or SPS 24V
AC 220V Optocoupler Isolation Module AC Optocoupler Detection Module

12,99 €