Square D™ PowerPact® I-Line® Molded Case Circuit Breaker, 600Y/347 VAC, 20 A, 50/60 Hz, 65 kA at 240 VAC, 35 kA at 480 VAC, 18 kA at 600Y/347 VAC Interrupt, B Frame, Thermal/Magnetic Trip, 400 to 600 A Trip, 3 Pole, 3, Toggle Actuator, Line/Load Lug, 14 to 2/0 AWG Al/Cu Wire, NEMA AB4/IP40 Enclosure, DIN Rail/Threaded Mount, -13 to 158 deg F, 5.39 in H x 3.19 in W x 4.09 in D, Gray