That 30 mA Type A rating means it catches pulsating DC fault currents from electronics (VFDs, switched-mode supplies) that a plain AC type would miss — so it's the right call for modern panel loads where harmonics are in the mix.
The C-curve (C-Char) trips between 5 and 10 times rated current — 50 to 100 A for this 10 A unit — which handles motor inrush and transformer magnetising peaks without nuisance tripping. The 30 mA residual threshold is the standard for personal shock protection in final circuits (IEC 60364). Type A covers both sinusoidal AC and pulsating DC faults up to 6 mA smooth DC superimposed, so it's fine on single-phase drives and LED drivers.