ABB ESB43175L U 175A 480V 2P 18K Circuit Breaker

ABB ESB43175L-U is a two-pole circuit breaker rated at 175 A and 480 V AC, part of ABB’s ESB family. It provides an 18 kA interrupting capacity, enabling it to safely interrupt high fault currents in industrial power distribution. As a two-pole device, it protects both conductors of a 480 V circuit and ensures simultaneous disconnection for safe isolation. When overloads or short circuits occur on either pole, the device trips to interrupt current and protect downstream equipment, wiring, and protective devices from damage. Typical applications include protecting feeders, motor circuits, and other loads within commercial and industrial electrical installations that operate at 480 V AC, where reliable overcurrent protection and rapid fault clearance are required. The 175 A rating and 18 kA short-circuit rating help balance protection with carry and predictability for medium-load feeders in distribution panels and switchgear setups.