1 Channel 12V Relay Module with Optocoupler Isolation (30A)

Product details This is a high-current relay board with a single channel relay driven by a 12 V supply. The input trigger is opto-isolated to protect the control side (microcontroller or logic circuitry) from electrical noise or voltage spikes coming from the load side. It uses a relay rated for 30 A (AC or DC depending on design), and supports both high-level and low-level trigger modes via jumper or configuration pins. Load outputs are provided via screw-terminal block (COM / NO / NC). An indicator LED shows relay state, and another LED shows power. The board is compact and rugged, suitable for controlling motors, heaters, pumps or other high-power loads from a 12 V-powered control system.