PC817 is a popular optocoupler (optical isolator) IC used to electrically isolate two circuits while transferring signals safely using light. It is widely used in power supplies, microcontroller interfaces, relay drivers, and industrial control systems to protect low-voltage electronics from high-voltage sections.

🔹 Features

✅ Electrical isolation between input and output
✅ High reliability and long life
✅ Compact DIP-4 package
✅ Easy to use with Arduino, ESP32, PLC, and other controllers
✅ Low power consumption
✅ Safe signal transfer using internal LED + phototransistor

🔹 Specifications

• Model: PC817 / PC-817
• Type: Optocoupler / Optoisolator
• Package: DIP-4
• Input: Infrared LED
• Output: Phototransistor
• Isolation Voltage: High (typically up to 5kV)
• Fast response time for switching applications
• Low input current requirement

📦 Package Includes

• 1 × PC817 Optocoupler IC (DIP-4)

🔧 Applications

⚡ Power supply feedback circuits
🤖 Arduino & microcontroller isolation
🔌 Relay driver circuits
📡 Signal isolation in industrial systems
🛠️ Motor control and automation
🔋 Protecting sensitive electronics from high voltage noise