What this MCB does on your panel
The Schneider Electric A9N4P63DGN is an Acti9 xC60 miniature circuit breaker rated 63 A with a D trip curve, 4 poles, and a 10 kA breaking capacity per IS/IEC 60898-1 at both 240 V and 415 V AC. Thermal-magnetic internals handle the overload side; the magnetic element clears short circuits fast enough to keep downstream damage contained.
DIN rail fit and wiring
The 4-pole body is 72 mm wide, 85 mm tall, 77.5 mm deep — that's 8 modules of 9 mm pitch. Biconnect terminals on the bottom let you daisy-chain the load side without extra links. Torque to 3.5 N·m.
