The MGP2503XE2 is a Schneider Electric PowerPacT 4 three-pole circuit breaker with a MicroLogic 2.2 electronic trip unit, rated 250 A at 40 °C. It delivers 36 kA Icu / Ics at 415 V AC, 50/60 Hz — the same symmetrical rating for both ultimate and service breaking capacity, so selectivity coordination stays straightforward in a panelboard feeding 250 A or 400/630 A distribution.
The MicroLogic 2.2 trip unit offers LSoI protection: long-time (Ir adjustable 100–250 A), short-time (Isd adjustable 1.5–10 × Ir, fixed delay), and instantaneous (Ii fixed at 3000 A). That fixed instantaneous pick-up means it's not field-adjustable for high inrush loads; if your motor or transformer starting current exceeds 3000 A, you'll need a different trip curve or a higher-rated frame.
Panel-mounted on a backplate, accepts horizontal or vertical orientation — useful when you're squeezing it into an existing enclosure layout. The 3-module (105 mm) width fits standard 35 mm DIN-rail spacing, though the breaker itself is backplate-mounted, not DIN-snapped. Toggle control gives a clear visual on/off indication; the electronic trip unit needs no auxiliary power to maintain protection settings.