Motor protection MCCB with MicroLogic 2.2 M trip unit
The Schneider Electric C10W32M050 is a ComPacT NSX100HB2 frame circuit breaker, rated 50 A at 65 °C, with a MicroLogic 2.2 M electronic trip unit dedicated to motor protection. It delivers 100 kA Icu breaking capacity at 690 V AC 50/60 Hz per IEC 60947-2, meaning it can safely interrupt fault currents up to that level without upstream cascading — critical for high-fault installations like large motor control centers or transformer-fed switchboards. The trip unit provides L (long-time overload), So (short-time short-circuit with fixed delay), and I (instantaneous) protection curves, with motor tripping classes 10, 5, and 20 selectable.
Panel and installation fit
IP40 enclosure protection and IK07 impact resistance suit it for general-purpose industrial switchgear — not washdown environments, but fine for dry indoor MCCs.
Electrical durability and duty
Electrical durability at 440 V is 20,000 cycles at half rated current (In/2) and 10,000 cycles at full In; at 690 V it drops to 10,000 cycles at In/2 and 5,000 at full In. For a motor-starting application with frequent starts, that 5,000-cycle figure at full voltage is the one to watch — plan spares accordingly if the line cycles more than a few times per shift.