The MGP1004XE2 is a Schneider Electric PowerPacT 4 4-pole circuit breaker with a MicroLogic 2.2 electronic trip unit, rated 100 A at 40 °C. It's a panel-mounted unit intended for distribution in 250 A or 400/630 A panelboards. The toggle control and backplate mounting support make it a straightforward swap into an existing panel layout — no DIN-rail adapter needed, just bolt it to the backplate and land the conductors.
Ics equals Icu here, meaning it can reclose and carry load after a fault at that full rating. That's Category A utilization class, so it's designed for distribution duty where coordination with downstream devices is managed by the trip curve, not for motor-starting applications. The MicroLogic 2.2 electronic trip unit gives you LSoI protection: Long-time (L) with adjustable Ir from 40 to 100 A, Short-time (S) with adjustable Isd from 1.5 to 10 times Ir, instantaneous (I) fixed at 1500 A, and a fixed ground-fault pickup (not present on this unit — it ships without earth-leakage protection). The long-time delay tr and short-time delay tsd are both fixed, so you can't tune the time bands; selectivity relies on the adjustable pickups and the fixed delay characteristics. Mounting position is flexible — horizontal or vertical — so it fits tight enclosures where you need to rotate the breaker to clear other gear. Electrical durability is 50,000 cycles at 440 V at rated current, dropping to 30,000 cycles at 2x In; mechanical durability matches at 50,000 cycles. That's solid for a distribution breaker in a panel that sees regular switching, not just fault protection.