What this 63 A ComPacT NSX breaker delivers
The Schneider Electric C10B6TM063C is a ComPacT NSX100B moulded-case circuit breaker with a 63 A TM-D thermal-magnetic trip unit, 4 poles, and a breaking capacity code of B — meaning 25 kA Icu at 415 V AC, 50/60 Hz per IEC 60947-2. The TM-D unit gives you L (thermal overload) and I (magnetic short-circuit) protection in one block, no earth-leakage module fitted. At 63 A and 50 °C ambient, this is the rating that governs the conductor sizing and coordination study for a distribution board or motor control centre feeder.
Breaking capacity — what the ladder tells you
The Icu ladder is 40 kA at 220/240 V, 25 kA at 380/415 V, 20 kA at 440 V, and 15 kA at 500 V.
Mounts on a backplate, not a DIN rail — the 161 mm height, 140 mm width, and 86 mm depth fit standard MCCB cutouts. Front connections top and bottom, neutral on the left, 35 mm connection pitch. IK07 impact resistance handles minor tool contact during wiring.
Rated for 50,000 mechanical operations and 50,000 electrical cycles at 440 V at half rated current — that is a long service life for a distribution breaker that is not cycled daily.