MDN4083LEA0422NMNX4NNNMPX, Cutler Hammer, Magnum DS, type MDN, drawout mounted, narrow frame, 3P, 3PH, 800A, 400A current sensors and rating plugs, 600V, 42kA@600V, 40C, bolt-on, manually operated, complete with factory installed 380-415Vac UVR, 4A/4B auxiliary switch, interchangeable Digitrip 220, LI - Long-Time and Instantaneous trip functions, load side lug terminals, mechanical trip indicator, solid state, low voltage power insulated case circuit breakers, shipped in drawout narrow cassettes, without shutters, pre-wired