It protects a single-phase final subcircuit against overload, short-circuit, and earth leakage in one unit. Rated at 16 A with a C characteristic tripping curve, it handles moderate inrush from motorised and fluorescent loads without nuisance trips. The 30 mA Type AC residual-current element catches sinusoidal AC earth faults — the standard choice for general-purpose socket circuits, lighting, and small appliances where no DC or pulsed fault content is expected.
Supply can enter from either top or bottom, which simplifies busbar routing in a crowded distribution board. The IP20 rating applies once installed with conductors connected — the front face is touch-safe, but the terminals are not live-deck protected until wired.