2-Channel 12V Relay Module with Optocoupler Isolation

This 2-channel 12V relay module allows microcontrollers and digital outputs to safely switch higher-voltage AC and DC loads. Featuring built-in SMD optocoupler isolation and jumper-selectable high or low level triggering, it provides dependable control for maker and automation projects. It is an ideal addition for students, hobbyists, and educators looking to interface logic circuits with mains or high-current devices.

Safe and flexible switching

Each channel is equipped with SMD optocoupler isolation, providing strong driving ability and stable performance with a low trigger current of 5mA. Individual channels can be configured for high or low level triggering using onboard jumpers.

Protective and fault-tolerant design

The board incorporates a fault-tolerant design to ensure the relay will not operate if the control line is broken. Visual feedback is provided via a green power indicator and red relay status indicators.

Convenient terminal connections

All inputs and outputs route directly through screw wiring terminals for quick wiring. The interface includes DC+ and DC- supply terminals, IN1 and IN2 trigger inputs, along with normally open (NO), common (COM), and normally closed (NC) relay contacts for each channel.

Physical mounting

The module measures 73 x 50 x 18.5 mm and includes four 3.1 mm mounting bolt holes spaced at 67 mm by 44.5 mm for secure attachment inside project enclosures.