The C1032G040 is a MicroLogic 2.2 G electronic trip unit designed for Schneider Electric's ComPacT NSX100...250 molded-case circuit breaker frames. The 'G' suffix marks it for generator protection duty, which means the trip curves are shaped to handle generator inrush and fault-current profiles differently than a standard distribution trip.
The 40 A rating at 40 °C is the continuous current the trip unit can carry without tripping — the actual Ir adjustment range is 18...40 A across 9 settings, so you can dial it down to match a smaller generator or feeder. Short-time pickup Isd is adjustable from 1.5 to 9 x Ir, giving you selectivity headroom downstream. Instantaneous pickup Ii is fixed at 600 A, which clears hard faults fast. The rated operational voltage is 690 V AC at 50/60 Hz, so it handles 480 V and 600 V class systems with margin. That matters for generator paralleling or motor starting where repeated overloads can damage windings. The IP40 front face keeps tools and fingers out but is not washdown-rated.
This is a plug-in electronic trip unit that snaps into the ComPacT NSX100/160/250 breaker frame. The breaker mounts fixed in a panel or enclosure — no DIN-rail adapter needed for the trip unit itself. The 3D protected poles mean all three phase poles are monitored; there is no neutral pole protection on this variant. No earth-leakage or zone-selective interlocking on this version — keep that in mind if your generator feeder requires ground-fault coordination.