Siemens, Sentron Series, type FXD, 3P, 3PH, 225A, 600V, 35kA@480V, standard interrupting capacity, 40 degree C, bolt-on, UL listed for reverse fed applications, complete with non-interchangeable trip, LI - Long-Time and Instantaneous trip functions. No lugs installed. thermal magnetic molded case circuit breakers.