Carlo Gavazzi RM1A48D75 Solid State Relay Module

Carlo Gavazzi RM1A48D75 is a 1-pole, panel-mount solid-state relay (SSR) in the RM1 family that delivers zero-cross AC switching for control panels. It supports an operating voltage of 42 to 530 VAC (1200 V peak) and a rated load current of 75 A on resistive loads (AC-51) and 20 A on inductive loads (AC-53a). The DC control input accepts 4 to 32 V, allowing straightforward interfacing with typical PLC outputs and automation controllers. Output connections use screws with captive clamps, and the module includes built-in overvoltage protection to guard the circuit against transient spikes. This RM1A48D75 is designed for single-phase, 1-pole operation and is intended for panel mounting in industrial or commercial equipment. Typical applications include switching AC power to heaters, pumps, fans, and other resistive or inductive loads where solid-state switching offers advantages over mechanical relays. The combination of a 42–530 VAC range, zero-cross switching, and the specified current ratings makes it suitable for medium-duty control tasks in automation installations that require a panel-mounted SSR.