The Schneider Electric A9N1P63BGN is an Acti9 xC60 miniature circuit breaker — a 1-pole, 63 A thermal-magnetic MCB with a B-curve trip characteristic. It is designed for distribution applications in 220–240 V AC networks at 50/60 Hz, with a breaking capacity of 10 kA Icn at 240 V AC per IS/IEC 60898-1. The 63 A rating handles a substantial feeder or a large sub-distribution board. It clips onto a standard 35 mm DIN rail (mounting support: 35 mm DIN rail, clip-on mode) and occupies 2 × 9 mm pitches (18 mm width), so it fits neatly into a compact distribution board alongside other Acti9 devices.
That is a standard residential and light-commercial fault level in many markets; if your available fault current exceeds 10 kA, you need a higher-rated device upstream or a current-limiting MCB with a higher Icn. The limitation class is 3 per IS/IEC 60898-1, meaning it limits let-through energy effectively under short-circuit conditions — a useful property for coordinating with downstream loads and reducing arc-flash risk.
Tightening torque: 3.5 N·m. Wire stripping length: 13 mm for top or bottom connection. IP20 finger-safe protection when installed in a panel.
Environmental and durability
Tropicalisation level 2 per IEC 60068-1, meaning it withstands damp heat and fungal growth — relevant for coastal or high-humidity installations. Relative humidity tolerance: 95 % at 55 °C. Electrical durability: 10,000 cycles; mechanical durability: 20,000 cycles.