The C063N420FM is a Schneider Electric ComPacT NS new generation moulded-case circuit breaker, rated 630 A at 50 °C with a MicroLogic 2.0 electronic trip unit. It is a 4-pole, fixed-mount unit with front connections, designed for distribution applications in commercial and industrial switchboards. The breaker is manually operated and complies with EN/IEC 60947-2, which governs low-voltage switchgear and controlgear — specifically the requirements for circuit-breaker performance and coordination.
The breaking capacity is 85 kA Icu at 220/240 V AC, 50 kA at 380/415 V AC, and 40 kA at 500/525 V AC. That figure governs selectivity with upstream devices and determines whether the panel's SCCR is met. The utilisation category is Category B, meaning the breaker is suitable for selective coordination — it can be set to let downstream faults clear first, keeping supply to healthy circuits.
The MicroLogic 2.0 electronic trip unit provides L (long-time overload) and I (instantaneous short-circuit) protection. The thermal memory is 20 minutes, which prevents nuisance tripping on repeated overloads by retaining heat history. The trip unit is rated 630 A at 50 °C; if the ambient in your enclosure runs hotter, expect derating. The breaker includes local signalling via four red LEDs for fault indication and one yellow LED for overload — useful for a quick visual check during commissioning or troubleshooting without opening the panel.
Fixed-mount on a backplate, with front connections top and bottom. Dimensions: 327 mm high, 280 mm wide, 147 mm deep. Connection pitch is 70 mm. The IP40 enclosure protection means it is safe from tools and small wires but not from water — keep it inside a dry switchboard. IK07 impact resistance handles accidental knocks during panel assembly.