The Schneider Electric A9R14463 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID range, rated 63 A continuous with 300 mA earth-leakage sensitivity, Type AC, instantaneous trip. The 73.5 mm depth and 72 mm width fit standard modular enclosures; the white housing and left-side neutral position are typical for Acti9 panel layouts.
Rated 63 A at 380...415 V AC, 50/60 Hz — sized for the main incoming feed of a small commercial sub-board or the outgoer of a larger distribution panel. The 300 mA sensitivity is a common choice for general-purpose socket-outlet and lighting circuits where a lower 30 mA threshold would cause nuisance tripping on cable leakage. Type AC means it detects sinusoidal alternating earth-leakage currents only; if the load includes rectified or pulsed DC fault currents (e.g., from VFDs, UPS, LED drivers), a Type A or Type B RCCB is required instead. The instantaneous trip (no time delay) ensures fast disconnection on earth faults, but means it cannot be used in selective (S-type) coordination schemes where a delayed downstream RCCB is needed. Voltage-independent tripping technology means the RCCB detects leakage current using the differential transformer alone, without needing a separate supply voltage — it will trip even if the line voltage is lost or severely depressed. This is standard for electromechanical RCCBs and avoids the failure mode of electronic types that may not trip on a lost neutral.
Installation and wiring constraints
Clip-on mounting to a 35 mm DIN rail; the 9 mm pitch count of 8 means it occupies 72 mm (8 modules) of rail width. Terminals accept 1...35 mm² solid or 1...25 mm² flexible (with or without ferrule) — sized for the 63 A incoming cable. The contact position indicator and padlocking provision allow lockout/tagout during maintenance. IP20 on the terminals (finger-safe), IP40 on the modular enclosure — suitable for installation inside a distribution cabinet rated IP4X or better.