2 Channel PC817 Optocoupler Isolation Module - 3-5V Input

This 2-channel PC817 optocoupler isolation module allows a microcontroller such as Arduino, ESP32, Raspberry Pi, or other 3.3V-5V logic systems to safely interface with higher voltage circuits using optical isolation. Each channel uses a dedicated PC817 optocoupler to electrically separate the control circuit from the output side, helping protect your microcontroller from voltage spikes, electrical noise, and back EMF generated by inductive loads such as motors and relays.

Electrical Specifications

• Channels: 2
• Input Signal Voltage: DC 3.3V-5V
• Output Signal Voltage: DC 1.8V-24V (wide range)
• Max Input Current: 50mA per channel
• Max Output Current: 50mA per channel
• Isolation Voltage: >3000V
• Max Signal Frequency: 5KHz
• Operating Temperature: -55°C to 110°C
• Module Dimensions: 38mm × 29mm

Pin Configuration

• IN1+ / IN1- Control signal input and ground for channel 1
• IN2+ / IN2- Control signal input and ground for channel 2
• OUT1+ / OUT1- Isolated output for channel 1
• OUT2+ / OUT2- Isolated output for channel 2

Key Features

• Dual channel isolation: Two independent PC817 optocouplers for controlling two separate circuits from one board
• Wide output range: Output side handles 1.8V-24V, suitable for level shifting between MCU logic and higher voltage circuits
• Screw terminals: 5.0mm pitch screw terminals for secure and convenient wiring
• Compatibility: Arduino, ESP32, ESP8266, Raspberry Pi, AVR, ARM

Typical Applications

Ideal for isolating two independent MCU outputs when driving relays or motors, level shifting between low-voltage logic and higher voltage PLC inputs, isolated signal detection, and current amplification where MCU output current is too low to drive a downstream circuit directly.

Explore More Modules

If you only need a single channel, check out our 1-channel PC817 optocoupler isolation module listing.

This product can be found here:

• 5V Relays
• Power
• Relays