The A9N1P63BIN is a 1-pole Acti9 xC60 miniature circuit breaker rated 63 A with a B curve, meaning the magnetic trip threshold is 4 x In ±20 % — so it trips instantaneously between 200 A and 300 A. The 10 kA Icu at 220…240 V AC (IS/IEC 60947-2) tells you it can safely interrupt a fault current up to 10 kA without welding or rupturing; at 12…48 V DC the breaking capacity rises to 15 kA, and at 60 V DC it drops to 6 kA — so if you are using this on a DC bus, verify the fault current stays under the DC rating. The thermal-magnetic trip unit combines a bimetal for overload protection and a solenoid for short-circuit protection.
The IP20 finger-safe terminals accept up to 35 mm² rigid or 25 mm² flexible cable; strip 13 mm and tighten to 3.5 N·m. The bottom terminals are the biconnect / tunnel type, so you can daisy-chain outgoing feeders without extra junction blocks. The white housing carries a toggle actuator with ON/OFF local indication. The tropicalisation treatment (class 2 per IEC 60068-1) means the internal plastics resist humidity and fungal growth — relevant for panels in coastal or unconditioned plant environments.