The Schneider Electric C063N45EFM is a ComPacT NS new generation 4-pole molded case circuit breaker rated 630 A at 50 °C, with a MicroLogic 5.0 E electronic trip unit. It carries a 50 kA Icu breaking capacity at 415 V AC (50/60 Hz) per EN/IEC 60947-2, making it a distribution-grade device for main or feeder protection in commercial and industrial switchboards.
The MicroLogic 5.0 E trip unit provides L (long-time overload), S (short-time short-circuit), and I (instantaneous short-circuit) protection curves, plus integrated energy metering. The electronic design includes a 20-minute thermal memory that retains the thermal model after a trip, so re-energizing a hot breaker doesn't reset the protection state — relevant for motor or transformer feeders where repeated inrush can mask an overload condition.
Rated Icu is 85 kA at 240 V AC, 50 kA at 415 V and 440 V AC, 40 kA at 500/525 V AC, and 30 kA at 690 V AC. The 50 kA at 415 V (code N) is the typical specification for 400 V class distribution — the breaker coordinates cleanly with downstream 50 kA-rated switchgear without requiring a current-limiting upstream device at that voltage.
Mounting and enclosure fit
Fixed-mounted on a backplate with front connections both top and bottom. Dimensions are 327 mm high, 280 mm wide, 147 mm deep — the 70 mm pole pitch matches standard busbar centers for 4-pole distribution blocks. IP40 enclosure protection and IK07 impact resistance suit indoor panel installation; the 10,000-cycle mechanical durability and 2,000-cycle electrical durability at full rated current (690 V In) define the maintenance interval.