TC4040TTR, General Electric, Power Break I, type TC, 3P, 3PH, 600V, 4000A current sensor rating, 4000A frame rating, 100kA@480V, 100% rated, UL listed, standard interrupting capacity, suitable for reverse feed, draw-out, for use with MicroVersaTrip PM or Plus trip units only, LSIG - Long-Time, Short-Time, Instantaneous and Ground Fault trip functions, solid state insulated case circuit breakers; these breakers are obsolete, however we do still stock them