The Type A residual-current element (30 mA rated residual operating current) detects pulsating DC fault currents as well as sinusoidal AC — essential on circuits feeding electronics, LED drivers, or single-phase VFDs that generate half-wave rectified leakage. Rated current In is 10 A with a 30 mA residual threshold; that combination is typical for lighting circuits, small appliance outlets, or control transformers in a panel where both overcurrent and earth-leakage protection are required in a single module width. The 1P+N form factor switches the line conductor only; the neutral is switched internally for isolation but not protected against overcurrent.
Deployment context
The single-module width (18 mm per pole) means it occupies one position in a multi-row enclosure — useful when retrofitting RCBO protection into a full rail without re-spacing the entire row.