2-Channel 5V 30A Relay Module with Optocoupler Isolation

This 2-channel 5V relay module allows you to switch high-power electrical loads of up to 30A with selectable high- or low-level triggering. Featuring onboard optocoupler isolation and dedicated safety routing, it prevents electrical interference between your control logic and power circuits. It is well suited for makers, students, and hobbyists developing smart home, IoT, or automated control projects.

High-current switching

The module uses high-power relays capable of controlling loads up to 30A per channel. It is fitted with black 9500 screw terminals to provide convenient and reliable high-current wiring connections.

Isolation and safety design

Each channel is equipped with optocoupler isolation for strong anti-interference performance. The double-sided FR-4 PCB includes physical isolation slots separating the low-voltage control and high-power load areas to comply with international safety standards.

Triggering and LED indicators

Both channels support high- and low-level triggering selectable via jumper pins. Each circuit also features a relay-on LED indicator to provide clear visual status during operation.

Typical applications

This relay board is suitable for PLC automation equipment, industrial control systems, smart home setups, Internet of Things (IoT) applications, and general electronics hobbyist experiments.