Schneider Electric RM4UA33M Control Relay 220-240V

Schneider Electric RM4UA33M is a Zelio Control voltage measurement relay that monitors AC voltage and provides automated signaling when voltage falls outside preset bounds. It runs from a 220–240 V AC supply and senses voltages from 30–500 V (AC/DC), enabling reliable overvoltage and undervoltage detection for automation circuits. The device provides two changeover contacts (2CO) rated up to 8 A, allowing two loads or interlock signals to be controlled from a single unit. With a 22 mm-wide form factor and compatibility with 50/60 Hz systems, it suits compact control panels and automation racks. The RM4UA33M weighs about 0.37 lb (0.168 kg) and is designed for typical industrial applications such as motor protection, voltage supervision of power circuits, and signaling within control systems. It is part of Schneider Electric's RM4U Zelio Control family, offering a compact, reliable voltage-monitoring solution for panels requiring fast, deterministic responses to voltage excursions.