Schneider Electric PowerPact™ I-Line™ Molded Case Circuit Breaker, Type BDA, 480Y/277 VAC, 20 A, 50/60 Hz Frequency, 18 kA Interrupt, B Frame, Thermal/Magnetic Trip, 400 to 600 A Trip, 3 Pole, Toggle Actuator, I-Line™/Mechanical Lug Connection, 14 to 2/0 AWG Al/Cu Wire, IP40/IK07 Enclosure, -13 to 158 deg F, 5.39 in H x 3.19 in W x 3.5 in D Dimensions, Gray