The C063H32EFM is a 3-pole ComPacT NS630b...1600 new generation moulded-case circuit breaker from Schneider Electric, rated 630 A at 50 °C with an electronic MicroLogic 2.0 E trip unit. This is a distribution-device application (Category B utilisation), so it's built to coordinate with downstream breakers for selective tripping rather than just clearing a fault in isolation.
Trip curve and diagnostics you can read at a glance
The MicroLogic 2.0 E provides L (long-time overload) and I (instantaneous short-circuit) protection. It includes a 20-minute thermal memory so the breaker remembers prior heating events — critical for motor-starting or cyclic loads where nuisance tripping on a hot restart is a real risk. The front-panel LCD display shows metering and energy data, and four red LEDs flag the fault type while a yellow LED signals overload. No laptop needed to read what happened; the local signalling tells you at the panel door whether it was a sustained overload or a bolted fault that dropped the line.
This is a fixed-mount breaker — backplate-mounted, 327 mm high, 210 mm wide, 147 mm deep, with a 70 mm connection pitch. IK07 impact rating handles the occasional dropped tool during commissioning. Pollution degree 3 (IEC 60947) means it's rated for conductive environments typical in industrial switchgear, not just clean HVAC closets. The manually operated control with LCD display sits behind the door, so operators see status without opening the panel.