The Schneider Electric A9R91463 is a 4-pole residual current circuit breaker (RCCB) from the Acti9 iID series, rated 63 A and 30 mA earth-leakage sensitivity. The 63 A rated current (In) sizes it for the main incoming supply or a large submain, not a final subcircuit. It is a Type A-SI (Super Immunised) device, meaning it handles sinusoidal AC residual currents plus pulsed DC (Type A) and resists nuisance tripping from transient surges or high-frequency leakage typical of VFDs and UPS systems. The voltage-independent tripping mechanism works without an external supply — the fault current itself powers the trip coil. Rated operational voltage is 380-415 V AC 50/60 Hz, which covers the standard three-phase European low-voltage network. The insulation voltage (Ui) is 500 V AC, giving headroom for the rated voltage class. Breaking and making capacity is 1500 A (Idm and Im), adequate for the fault levels typical at the outgoer position in a domestic or small commercial distribution board. The surge current withstand is 3000 A (8/20 µs impulse), conforming to EN/IEC 61008-1.
Clip-on mounting on DIN rail, 8 x 9 mm pitches wide (72 mm). Neutral on the left. The toggle control and padlocking device allow lockout/tagout during maintenance. Terminals accept 1-35 mm² rigid or 1-25 mm² flexible wire; tightening torque 3.5 N.m. Wire stripping length 14 mm. The 73.5 mm depth fits standard shallow enclosures — verify the gland plate clearance if back-mounting.