SEF361200LSIES7B8, Schneider Electric / Square D, SE Series, type SEF, 3P, 3PH, 1200A, 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, 120VAC shunt closing coil & 125VDC shunt trip along with 2 N.O. AC rated auxiliary switch with bell alarm, insulated case circuit breakers, these breakers are now obsolete; however, we do still stock them