The Schneider Electric A9R31463 is a 4-pole Acti9 iID residual current circuit breaker (RCCB) rated at 63 A with 30 mA earth-leakage sensitivity. It provides personnel protection against direct and indirect contact, tripping instantaneously on fault currents above the threshold. The Type A-SI (Super Immunised) classification means it handles pulsed DC fault currents and is immune to nuisance tripping from high-frequency harmonics or transient surges common on modern electronic loads — variable-speed drives, switched-mode power supplies, and UPS systems won't cause false trips.
The 6 kV rated impulse withstand voltage (Uimp) ensures it survives transient overvoltages on the supply side without internal flashover. The 30 mA sensitivity is the standard for personnel protection. The instantaneous time delay means it trips within milliseconds of a fault.
Clip-on mounting to DIN rail (35 mm symmetrical rail per EN 60715). Occupies 8 x 9 mm pitches (72 mm width) in the enclosure. Neutral position is left, which is standard for 4P RCCBs in most European distribution boards. The toggle control provides a clear mechanical contact position indicator — you can see the state without powering the panel. Terminals accept 1-35 mm² solid or 1-25 mm² flexible conductors. Wire stripping length is 14 mm.
Compliance documentation: the RCCB is certified to EN/IEC 61008-1 (the harmonized European standard for residual current operated circuit-breakers without integral overcurrent protection). The electromagnetic compatibility is verified with an 8/20 µs impulse withstand of 3000 A per that standard. No UL or CSA listing is stated on this variant — confirm jurisdiction-specific approvals for North American installations.