The CBi Earth Leakage 3P+N 415V AC SM36A is a three-phase residual current device (RCD) designed to protect three-phase electrical installations against earth faults and leakage currents. With a 36A rated current, 6kA breaking capacity, and sensitivity options from 50–1000 mA, it combines phase and neutral pole protection in a compact 117 mm DIN-rail footprint. Ideal for industrial panels, commercial installations, and three-phase circuits requiring simultaneous overload and earth fault protection.