The Schneider Electric A9R70463 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID K series, rated at 63 A with 30 mA Type AC earth-leakage sensitivity.
The 4-pole (4P) configuration with neutral on the left handles three-phase + neutral networks. Rated operational voltage of 380-415 V AC matches standard European low-voltage distribution. Breaking capacity Idm/Im of 630 A covers the prospective fault current typical at the outgoer position in a domestic or small commercial DB. Voltage-independent tripping means the RCCB detects earth leakage and disconnects even if the phase voltage collapses — a safety advantage over electronic RCDs that need auxiliary power to trip. Instantaneous response (no time delay) provides fast disconnection for shock protection.
Tunnel terminals accept 1-35 mm² rigid or 1-25 mm² flexible cable; strip 16 mm and torque to 3.5 N.m. IP20 on the body, IP40 inside the modular enclosure — standard for enclosed distribution boards.