The C10H44V040 is a Schneider Electric ComPacT NSX100H 4-pole MCCB rated 40 A at 40 °C, built around the MicroLogic 4.2 electronic trip unit with integrated earth-leakage protection. At 415 V AC the breaking capacity is 70 kA Icu; at 440 V AC it's 65 kA Icu, so the part holds its interrupting rating well into the 400 V class, not just at low voltage.
Trip unit and protection logic
The MicroLogic 4.2 is an electronic trip unit offering L (long-time overload), So (short-time short-circuit with fixed delay), I (instantaneous short-circuit), and R (earth-leakage) protection — all in one package. Earth-leakage is integrated, not a bolt-on accessory, which simplifies panel wiring and reduces the component count per feeder.
Dimensions: 161 mm H × 140 mm W × 86 mm D. IP40 front face, IK07 impact rating.
