1-Channel 5V 30A Heavy Duty Relay Module with Optocoupler

This 1-channel 5V 30A relay module allows microcontrollers like Arduino to safely switch high-current AC and DC loads. Featuring built-in optocoupler isolation and selectable high or low level triggering, it provides reliable switching for automation and power control projects. It is ideal for hobbyists, makers, and students building home automation systems or robotics projects.

High load capacity and optocoupler isolation

The module uses a heavy-duty 30A relay capable of switching loads up to AC 250V/30A or DC 30V/30A on its normally open interface. Integrated chip optocoupler isolation ensures stable performance, strong driving capability, and protection for your microcontroller circuit.

Flexible triggering and convenient connections

A selectable jumper lets you configure the module for either high-level or low-level triggering with a trigger current of 2 to 4mA. All power, control, and relay load connections are made directly via onboard screw terminal blocks for quick and secure wiring.

Mounting and dimensions

The board measures 72 x 40 x 24mm (or 86 x 43 x 45mm with module holder) and weighs 46g. It includes four 3.1mm fixing bolt holes with 44.5 x 27.5mm spacing for straightforward chassis or enclosure mounting.

Interface description

The board provides DC+ and DC- terminals for power input, an IN terminal for the control signal, and COM, NO, and NC contacts for the relay output.

What is included

The package includes 1 x 5V 30A relay module.