The C125H32EFM is a 3-pole ComPacT NS new generation MCCB from the ComPacT NS630b...1600 range, rated 1250 A at 50 °C with a MicroLogic 2.0 E electronic trip unit. It provides L (long-time overload) and I (instantaneous short-circuit) protection, plus an integrated energy meter function via the LCD display.
Rated Icu of 85 kA at 240 V AC, 70 kA at 415 V AC, 65 kA at 440 V AC, 50 kA at 500/525 V AC, and 42 kA at 690 V AC — all per IEC 60947-2. Category B utilization suits selective coordination with downstream breakers.
Connection pitch is 70 mm. Dimensions: 327 mm high, 210 mm wide, 147 mm deep. IP40 enclosure protection (IK07 impact resistance) suits it for indoor panel installation where dust ingress is limited.
Trip unit and diagnostics
The MicroLogic 2.0 E electronic trip unit includes a 20-minute thermal memory for accurate overload protection after a trip. Local signalling uses 4 red LEDs for fault indication and 1 yellow LED for overload. The LCD display provides real-time metering (energy, current, voltage) — useful for panel-level energy monitoring without an external meter. Power losses are 44 W at rated current.