PC817 Optocoupler Optoisolator IC for Arduino, Relay Modules, PLC & DIY Electronics

Description

The PC817 Optocoupler (also known as an optoisolator) is an electronic component that transfers electrical signals between two isolated circuits using light. Inside the IC, an infrared LED and a phototransistor work together to pass the signal without direct electrical connection. This isolation protects sensitive microcontrollers and low-voltage circuits from high-voltage spikes, electrical noise, and accidental damage. The PC817 is commonly used in Arduino circuits, relay boards, switching power supplies, inverter boards, industrial control systems, and communication interfaces. Its compact 4-pin package, low cost, and reliable operation make it one of the most popular optocouplers for ele

Key Features

• Provides electrical isolation between input and output circuits
• Protects microcontrollers and sensitive electronics from high voltage
• Compact 4-pin DIP package for easy PCB mounting
• High isolation voltage up to 5kV
• Low power consumption and reliable performance
• Fast switching and stable signal transfer
• Ideal for use with Arduino, ESP32, Raspberry Pi, PLCs, and relay modules
• Commonly used in power supply feedback and signal isolation circuits

Specifications

What's in the Box

• 1 × PC817 Optocoupler IC