MDN4083LEA0422NMNNNNNCMAX, Cutler Hammer, Magnum DS, type MDN, drawout mounted, narrow frame, 3P, 3PH, 800A, 400A current sensors and rating plugs, 600V, 42kA@600V, 40°C, bolt-on, manually operated, complete with factory installed interchangeable Digitrip 220, LI - Long-Time and Instantaneous trip functions, Castell keylock, load side lug terminals & mechanical trip indicator, solid state, low voltage power insulated case circuit breakers