4-Channel 5V Relay Module Board, Optocoupler Isolated Relay Interface Compatible with Arduino R3, Mega 2560, Raspberry Pi, ESP32 and DIY Automation Projects

The Lab 4-Channel 5V Relay Module Board is designed for controlling high-current devices through low-voltage microcontroller signals. Each channel supports up to 10A switching capacity at AC 250V or DC 30V, making it suitable for home automation, robotics, industrial control, and DIY electronics projects. Built with optocoupler isolation and high-quality relays, the module helps improve signal stability and provides reliable switching performance. Each channel requires only 15–20mA driving current and can be directly controlled by common development boards such as Arduino, Raspberry Pi, ESP32, and other microcontrollers. Ideal for controlling lights, fans, pumps, audio equipment, household appliances, automotive accessories, and various electronic devices, this 4-channel relay board offers a convenient solution for switching high-power loads safely and efficiently.