MDN4083LEA04CUNMNNNENNNAX, Cutler Hammer, Magnum DS, type MDN, drawout mounted, narrow frame, 3P, 3PH, 800A, 400A current sensors and rating plugs, 600V, 42kA@600V, bolt-on, manually operated, complete with interchangeable Digitrip 520MC, LSI - Long-Time, Short-Time and Instantaneous trip functions, 120Vac trip unit power supply voltage, power relay module high load alarm, load side lug terminals, solid state electronic, low voltage power insulated case circuit breakers