The 1 Channel 3V Relay Module is a compact and reliable switching module designed to control high-voltage or high-current loads using a low-power 3V control signal. Built around a single electromechanical relay, this module acts as an electrically operated switch, allowing your microcontroller to safely control mains-powered appliances, motors, solenoids, and other high-power devices without direct electrical connection.

Featuring an optocoupler-isolated input circuit, the module protects your microcontroller from voltage spikes and back-EMF, ensuring safe and stable operation. The onboard status LED provides a clear visual indication of the relay state, making debugging and testing effortless during development.

Perfectly suited for home automation, IoT projects, industrial control systems, and robotics, this module is compatible with 3V logic microcontrollers including ESP8266, ESP32, and similar boards. A trigger selection jumper allows switching between active HIGH and active LOW triggering modes for maximum flexibility.