The Schneider Electric A9Z26463 is a 4-pole Acti9 iID residual current circuit breaker (RCCB) rated at 63 A with 500 mA earth-leakage sensitivity, Type A protection. The 500 mA sensitivity suits equipment or submain protection. Rated conditional short-circuit current is 10 kA, and the device withstands 1500 A Idm/Im making and breaking capacity — figures that govern selectivity coordination with the upstream MCB or fuse. Construction is voltage-independent: the tripping mechanism stores energy from the fault itself, so it clears residual currents even if the phase voltage collapses.
Occupies 8 x 9 mm pitches (72 mm) on the DIN rail. Clip-on mounting with neutral on the left. IP20 finger-safe, IP40 inside the modular enclosure. Storage range -40...85 °C; operating range -25...60 °C — fine for unheated plant rooms and outdoor-rated cabinets.
Standards and lifecycle
Rated insulation voltage 500 V AC, impulse withstand 6 kV.