2 Channel 3V Relay Module

The 2 Channel 3V Relay Module is a dependable and versatile switching module that enables simultaneous independent control of two high-voltage or high-current loads using low-power 3V control signals. Built around two electromechanical relays, this module serves as a dual electrically operated switch, allowing your microcontroller to safely manage mains-powered appliances, motors, solenoids, and other high-power devices without any direct electrical connection.

Featuring optocoupler-isolated input circuits on both channels, the module effectively protects your microcontroller from voltage spikes and back-EMF, ensuring consistent and safe operation under load. Individual status LEDs for each channel provide clear visual indication of each relay state, simplifying testing and debugging during development.

Ideal for home automation, IoT applications, industrial control, and multi-output robotics systems, this module is fully compatible with 3V logic microcontrollers including ESP8266, ESP32, and similar boards. A trigger selection jumper allows switching between active HIGH and active LOW triggering for maximum circuit flexibility.

Specification:

• Control Voltage : 3V DC
• Relay Type : Electromechanical (SPDT)
• Number of Channels : 2 (independently controlled)
• Contact Configuration : NO, NC, COM (per channel)
• Maximum AC Load : 250V AC / 10A (per channel)
• Maximum DC Load : 30V DC / 10A (per channel)
• Optocoupler Isolation : Yes (per channel)
• Status Indicator : Individual onboard LED per channel
• PCB Dimensions : Approximately 75mm x 27mm
• Compatible Platforms : ESP8266, ESP32, Arduino (3V logic)