Square D™ Molded Case Circuit Breaker, Type LA Standard, 600 VAC/250 VDC, 300 A, 50/60 Hz, 25 kA Interrupt, L Frame, Thermal/Magnetic Trip, 1500 to 3000 A Trip, 3 Pole, 3 ph, Lug, 1 AWG to 600 kcmil, (2) 250 kcmil Wire, Plug-On Mount, 104 deg F, 6 in W x 5.8 in D x 11 in H