SEF361200LSIT2, 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, complete with 24VDC shunt trip & 120VAC undervoltage trip, insulated case circuit breakers, these breakers are now obsolete; however, we do still stock them