SEF36400LSGMRZ, Schneider Electric / Square D, SE Series, type SEF, 3P, 3PH, 400A, 600V, 100kA@480V, bolt-on, complete with Micrologic Series B trip device, LSIG - Long-Time, Short-Time, Instantaneous and Ground Fault trip functions, solid state protection, motor ready for electrical operation, insulated case circuit breakers, these breakers are now obsolete; however, we do still stock them