The Schneider Electric A9Z35463 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID family, rated 63 A with 300 mA earth-leakage sensitivity. It operates on 380–415 V AC networks at 50/60 Hz and is Type A-SI (Super Immunised), meaning it handles pulsed DC fault currents and is immune to nuisance tripping from high-frequency harmonics common on modern electronic loads. The RCCB is voltage-independent — it trips on residual current alone, no external power needed. The selective (time-delayed) characteristic coordinates with downstream devices to avoid cascading trips. Rated conditional short-circuit current is 10 kA, with a making/breaking capacity of 1500 A (Idm/Im).
Clip-on mounting to standard 35 mm DIN rail — 8 modules wide (9 mm pitches). Neutral is on the left. IP20 terminals (IP40 in modular enclosure) suit panel-mount indoor use. Double terminals accept up to 35 mm² rigid or 25 mm² flexible conductors; strip length 14 mm, torque to 3.5 N·m.
Current-production part — no end-of-life notice on record.