The Square D MGP26450 is a PowerPact M unit mount breaker rated 450 A, three-pole, with an electronic trip unit and an interrupting capacity of 18 kA at 600 VAC. The lugs-off-end termination suits panelboard or switchboard mounting where line and load conductors enter from the same direction.
This is a unit mount breaker — it bolts directly to a bus or mounting pan rather than plugging into a drawout cassette. Common in OEM switchboards, compressor control panels, and refrigeration skids where the breaker stays fixed for the life of the assembly. The 450 A frame covers large motor branch circuits, feeder taps, or main disconnects for secondary distribution sections. The electronic trip is field-adjustable, so you can dial in the protection settings during commissioning without swapping trip units.