Square D EGB34020 Three Phase Circuit Breaker

Square D EGB34020 is a three-pole molded-case circuit breaker rated at 20 A for 480Y/277 V, part of Square D’s E-Frame bolt-on line. This bolt-on unit is designed for panelboard installations and accepts 14-2/0 AWG aluminum or copper conductors with certified bolt terminals. It provides thermal-magnetic protection with a fixed trip characteristic, suitable for protecting three-phase feeders and branch circuits in commercial or industrial equipment. The interrupting capacity is 35 kA at 480 V (480Y/277 V), with a higher 65 kA rating at 240 V, enabling it to handle high-fault currents without nuisance tripping in compatible systems. The enclosure footprint is compact for an E-frame breaker, with approximate dimensions of 2.94 in high by 4.05 in wide by 5.66 in deep. Typical applications include protecting NF panelboards and other three-phase electrical distribution networks powered from 480/277 V systems, where reliable overload and short-circuit protection is required.