MWN5164LEA, Cutler Hammer, Magnum, type MWN, drawout mounted, narrow frame, 4P, 3PH, 1600A, 690V, 50kA@690V, bolt-on, NABC phasing, complete with interchangeable Digitrip RMS with possible LI/LSI/LSIG/LSIA trip functions, load side lug terminals, solid state electronic, IEC low voltage power air circuit breakers