The Schneider Electric A9Z89463 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID family, rated 63 A continuous with 100 mA earth-leakage sensitivity and Type A-G waveform detection. The 100 mA sensitivity means it trips on leakage currents above that threshold, covering both sinusoidal AC and pulsating DC residual faults (Type A) plus smooth DC (Type G) — the G suffix adds protection against smooth DC faults that a standard Type A might miss, common in circuits with rectified loads like LED drivers or VFDs.
Double-terminal front and back connections accept up to 35 mm² rigid or 25 mm² flexible; strip 14 mm and torque to 3.5 N.m. The 8-module footprint (72 mm wide, 73 mm deep, 91 mm tall) fits a standard Acti9 distribution board slot — plan for that width when laying out a multi-pole RCCB/RCBO row.
Designed to EN/IEC 61008-1, the harmonized standard for RCCBs in Europe and many other markets. The 8/20 µs impulse withstand of 250 A (per EN/IEC 61008-1) and rated impulse withstand voltage of 6 kV (Uimp) indicate the device can handle typical surge events without nuisance tripping or damage. Electrical durability is 15,000 cycles under AC-1 resistive load; mechanical durability is 20,000 cycles. The toggle control and contact position indicator give a clear visual on status — padlocking option available for lockout/tagout.