SEF364000LSIES4D5, 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 125VDC spring charging motor, shunt closing coil & shunt trip along with AC/DC rated auxiliary switch with bell alarm, insulated case circuit breakers, these breakers are now obsolete