The Schneider Electric C063N42AFM is a ComPacT NS new generation moulded-case circuit breaker rated 630 A at 50 °C, with a MicroLogic 2.0 A electronic trip unit providing L (long-time overload) and I (instantaneous short-circuit) protection. It is a 4-pole, fixed-mount unit with front connections top and bottom, sized for backplate mounting in a distribution panel. The 630 A frame covers high-current feeders or main incomers in commercial and industrial switchboards. Breaking capacity is the headline selector: 85 kA Icu at 220/240 V AC, 50 kA at 380/415 V AC, and 50 kA at 440 V AC per IEC 60947-2. That N-breaking-capacity code (50 kA at 415 V) means it handles most utility-fault levels without cascading upstream. The MicroLogic 2.0 A is an electronic trip unit, not thermal-magnetic, so it holds its calibration tighter across ambient temperature swings. Thermal memory is 20 minutes — after a trip, the breaker remembers the heat profile for that window, preventing immediate reclose on a still-hot circuit. Four red LEDs signal fault type; one yellow LED flags overload pre-alarm.
Fixed-mount on a backplate, 70 mm connection pitch between poles. Dimensions: 327 mm high, 280 mm wide, 147 mm deep. IP40 enclosure protection (finger-safe), IK07 impact resistance. Overvoltage category III, so it's rated for fixed-installation distribution boards downstream of the service entrance. Neutral is on the left (4-pole, switched neutral). Front connections both sides simplify busbar or cable landing in a standard switchboard layout. Electrical durability: 2000 cycles at 690 V In, 5000 cycles at 440 V In. Mechanical durability: 10,000 cycles. For high-cycle applications like welding or furnace switching, that's a factor to check against your expected operations.
Operating altitude: 0–2000 m without derating, 2000–5000 m with derating. Relative humidity 0–95 %. Power losses at rated current: 10 W — relevant for thermal management inside a sealed enclosure.