The Schneider Electric MGP1004XFO is a PowerPacT 4 basic frame — a 100 A, 4-pole (4P) molded-case circuit breaker frame rated 50 kA Icu and 50 kA Ics at 415 V AC 50/60 Hz. It ships without a trip unit, so you pair it separately for the protection curve you need. Built to BS EN 60947-2, it carries a 800 V rated insulation voltage and an 8 kV impulse withstand, with IP40 enclosure protection and IK07 impact resistance.
The 100 A rated current (In) sets the continuous load limit — size your upstream feeder and downstream bus for at least this. Utilisation category A (non-delayed) means it's designed for distribution, not motor starting — use it for cable/ busbar protection, not direct motor switching. The 4-module 35 mm width (140 mm) and 86 mm depth fit standard panelboard cutouts; backplate mounting with horizontal or vertical orientation gives layout flexibility.
Deployment context
This frame is panel-mounted in 250 A, 400 A, or 630 A panelboards — typical for commercial or industrial distribution. The Class II double-insulation rating (no earth connection needed) simplifies wiring. Altitude derating above 2000 m — if your site is above that, factor in reduced dielectric strength.