The C11F44V025B is a Schneider Electric ComPacT NSXm 4-pole MCCB rated 25 A at 40 °C with a 36 kA breaking capacity at 415 V AC. It carries the MicroLogic 4.1 electronic trip unit and integrated earth-leakage protection with adjustable sensitivity from 30 mA to 5 A for class A and class AC faults.
What the 36 kA rating means for your panel
For a distribution board fed from a transformer in the 630 kVA to 1000 kVA range, that's enough headroom to avoid cascading failure upstream — the breaker clears the fault before the main switch sees it. Category A utilisation means it's not intended for selectivity under short-circuit conditions with another breaker downstream — you'd typically use it as a main or branch feeder where the fault current is known and coordinated by the upstream device.
Integrated earth-leakage — one less module on the rail
Sensitivity is field-selectable: 30 mA, 100 mA, 300 mA, 500 mA, 1 A, 3 A, or 5 A for both class A (pulsating DC) and class AC (sinusoidal AC) residual currents. That covers everything from personnel protection at 30 mA to feeder protection against ground faults at 5 A. The 20-minute thermal memory before and after tripping means the trip unit remembers the heat history of the conductor — if a fault occurs, then clears, and another fault hits before the copper cools, the breaker trips faster. That's useful for intermittent overloads on pump or compressor circuits.
Width is 108 mm (12 module pitches at 9 mm), depth 80 mm, height 144 mm. Connection terminals accept compression lugs or busbars; the connection pitch is 35 mm with spreaders, 27 mm without. IK07 impact rating handles incidental tool bumps during commissioning.