MDN4083LEA0322NMNG4YCKNAX, Cutler Hammer, Magnum DS, type MDN, drawout mounted, narrow frame with factory installed block close PB metal frame padlockable pushbutton cover, 3P, 3PH, 800A, 300A current sensors and rating plugs, 600V, 42kA@600V, 40°C, bolt-on, manually operated, complete with factory installed 32Vdc UVR, interchangeable Digitrip 220, LI - Long-Time and Instantaneous trip functions, load side lug terminals, 4A/4B auxiliary switch, mechanical trip indicator, OTS switch & kirk keylock, solid state, low voltage power insulated case circuit breakers