The A9F04763 is a 63 A, 3P+N miniature circuit breaker from the Schneider Acti9 iC60 series, with a C-curve trip characteristic (magnetic trip at 8 x In ±20 %). The breaking capacity tells the real story: 36 kA Icu at 12–133 V AC, 20 kA at 220–240 V, 10 kA at 380–415 V, and 6 kA at 440 V AC per EN/IEC 60947-2. For IEC 60898-1 applications it's rated 6000 A Icn at 400 V. That means it can clear high fault currents on the low-voltage side of a distribution transformer without welding contacts — critical for a mill feeder or sub-distribution panel where available fault current can hit those levels.
Snaps onto a DIN rail (9 mm pitch, 8 pitches wide — 72 mm width, 91 mm height, 78.5 mm depth). The double terminals accept 1–35 mm² rigid or 1–25 mm² flexible; tightening torque is 3.5 N·m. IP20 rated, so it's for inside a panel — not washdown. The toggle provides local on/off with a trip indicator. Neutral on the left, 3 protected poles on the right. Earth-leakage protection requires a separate block (not built in).
Dual-certified to EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (household/similar) — so it fits both a factory distribution board and a commercial sub-panel. Suitability for isolation is confirmed under both standards. Pollution degree 3, overvoltage category IV, tropicalisation class 2 per IEC 60068-1. 10,000 electrical cycles, 20,000 mechanical cycles.