2-Channel 5V Relay Module with High/Low Level Trigger

This 2-channel 5V relay module allows microcontrollers to safely switch high-power loads up to 250V AC or 30V DC at 10A. Featuring onboard optocoupler isolation and selectable high or low level triggering via jumpers, it provides dependable circuit control for automation and electronics projects. It is well suited to students, makers and hobbyists building switching systems.

Optocoupler isolation and triggering

The module uses SMD optocoupler isolation with a 5mA trigger current to deliver strong driving capability and stable performance. Each channel can be individually configured for high or low level signal triggering by setting the onboard jumper.

Status indicators and safety design

A built-in fault-tolerant design ensures the relay will not operate if the control line is disconnected or broken. A green LED indicates power status while red LEDs display the active state of each relay channel.

Terminal connections and mounting

All inputs and outputs route to direct screw terminal connections, providing normally open (NO), common (COM), and normally closed (NC) contacts for both channels alongside power and control signal pins. The board is equipped with four 3.1mm mounting bolt holes spaced at 67mm by 44.5mm for secure installation.