Square D EGB34030N Molded Case Circuit Breaker

Square D by Schneider Electric EGB34030N is a three-pole, 30-amp molded-case circuit breaker in the E-Frame family, designed for 480Y/277V AC service in NF lighting panelboards. The bolt-on device provides thermal-magnetic overcurrent protection, making it suitable for branch circuits in commercial electrical distributions. It carries an interrupting rating of 35 kA at 480Y/277 VAC, enabling reliable interruption of faults in typical lighting and general-purpose loads. This 3P breaker is designed for use in Square D NF panelboards and their enclosures, and is commonly cataloged as EGB34030N or EGB34030 across distributor inventories. The E-Frame construction offers compact, bolted-on mounting compatible with standard NF panelboard architectures, and the unit is commonly referenced in catalogs and distributor listings as part of the Square D EGB series. Applications include lighting circuits, outlets, and other branch protections within commercial buildings where a 30 A protection level is appropriate and 480Y/277 VAC is the system voltage. The combination of thermal-magnetic trip and the E-Frame form factor delivers predictable trip characteristics and straightforward replacement in legacy Square D installations, helping maintain code-compliant overcurrent protection without replacing the entire panel.