SEF361200MR, Schneider Electric / Square D, SE Series, type SEF, 3P, 3PH, 1200A, 600V, 100kA@480V, bolt-on, complete with Micrologic Series B trip device, LI - Long-Time and Instantaneous 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