SEF364000LSIES8B8, Schneider Electric / Square D, SE Series, type SEF, 3P, 3PH, 4000A, 600V, 100kA@480V, bolt-on, complete with Micrologic Series B trip device, LSI - Long-Time, Short-Time and Instantaneous trip functions, solid state protection, electrically operated complete with 120VAC spring charging motor, 24VDC shunt closing coil & 24VDC shunt trip along with 2 N.O. AC rated auxiliary switch with bell alarm, insulated case circuit breakers, these breakers are now obsolete