The Schneider Electric A9R81463 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID series, rated at 63 A with 30 mA earth-leakage sensitivity. Mounts via clip-on to a DIN rail, occupying 8 x 9 mm pitches (72 mm wide). Rated breaking capacity is 1500 A (Idm and Im), sufficient for most sub-distribution outgoing circuits.
The 63 A rated current (In) and 30 mA sensitivity define the two critical selection parameters: the breaker must be sized to the load current (63 A is typical for a large sub-main or a high-power final circuit), and the 30 mA trip threshold provides personnel protection against direct-contact faults. The instantaneous trip time (no intentional delay) means it clears ground faults immediately — no selectivity with downstream 30 mA RCCBs, but full coordination with upstream time-delay types. Type AC classification (EN/IEC 61008-1) limits this RCCB to sinusoidal AC residual currents. If the downstream load includes variable-speed drives, UPS systems, or LED drivers that can generate pulsed or DC fault currents, a Type A or Type B RCCB would be required instead. For standard resistive, inductive, or motor loads on a clean sine-wave supply, Type AC is the correct and most economical choice. Rated insulation voltage (Ui) is 500 V AC, operational voltage range is 380-415 V AC. Pollution degree 3 rating confirms installation in conductive or dry non-conductive pollution.
Integration notes
The IP20 body (IP40 in a modular enclosure) suits dry indoor panels — not washdown or outdoor locations. The voltage-independent residual current tripping technology means the RCCB will trip on a ground fault even if the phase voltage is lost — a safety advantage over electronic types that require auxiliary power. The 8/20 µs impulse withstand of 250 A ensures it does not nuisance-trip on transient surges.