It protects a single-phase AC circuit against overload, short-circuit, and earth leakage in one unit, saving a DIN-rail slot versus separate MCB + RCCD. Residual-current element is Type AC, rated at 300 mA. Type AC detects sinusoidal AC earth faults only.
Breaking capacity and fault clearing
Energy limitation class 3 means it restricts let-through energy enough to protect downstream wiring and loads from thermal damage during a short circuit.
Width is 36 mm (2 modular units), depth 70 mm — the same footprint as a 2-pole SENTRON MCB, so it fits existing distribution boards without extra spacing. Rated for overvoltage category III (distribution-level surge withstand) and pollution degree 2 (non-conductive dust, occasional condensation).