The MGP26800SA is a PowerPact M unit mount breaker from Schneider Electric — a 2-pole, 800 A frame with an electronic trip unit, rated 600 VAC and an interrupting capacity of 18 kA. It includes a shunt trip for remote opening and ships with lugs off the end for line/load terminations.
The 800 A frame and 18 kA interrupting at 600 VAC govern the application: this breaker is sized for a 600 V feeder or large motor circuit where available fault current stays under 18 kA. The 2-pole configuration means it switches two phases — typical for a single-phase 600 V load or a two-pole section of a three-phase system where the third pole is handled elsewhere. The electronic trip unit allows field-adjustable settings, so you can tailor the trip curve to the load without swapping trip packs. Shunt trip adds a remote-trip coil for emergency-stop or fire-alarm integration.