The 63 A rated current matches the main breaker's thermal capacity, so this unit tracks the full load without derating. The 30 mA sensitivity covers personnel protection per IEC 61009-1, tripping on leakage currents above that threshold. The Type A-SI (Super Immunised) classification means it handles pulsed DC fault currents from electronics and ignores nuisance tripping from high-frequency leakage — useful on circuits with VFDs, UPS systems, or switching power supplies. Voltage-independent tripping means the RCD operates even if the supply neutral is lost, which matters for safety continuity on portable or temporary supplies.
This is a 4-pole (4P) unit for three-phase plus neutral circuits, rated 400-415 V AC 50/60 Hz. The tunnel terminals at the bottom accept 1 to 35 mm² rigid cable or 1 to 25 mm² flexible, and the tightening torque is 3.5 N.m. At 135 mm wide and 73.5 mm deep, it takes 7 x 9 mm pitches on the rail — plan the enclosure fill accordingly. IP20 body, IP40 inside the modular enclosure, so it's fine for clean indoor panels but not washdown areas.