Square D EDB34090SAU Molded Case Circuit Breaker

Square D EDB34090SAU is a 90-amp, three-pole molded-case circuit breaker from Schneider Electric's Square D EDB family. It is rated for 480Y/277 VAC service and provides 18 kA interrupting capacity, enabling fast fault clearance in demanding three-phase distribution networks. The bolt-on E-frame design simplifies installation in compatible panelboards, and the unit employs a thermal-magnetic trip mechanism to deliver long-time and instantaneous protection for feeders and branch circuits. With its 3P configuration and robust construction, it is well suited for protecting 480V three-phase circuits in commercial, light-industrial, and data-center environments, where reliable protection of feeders and loads is essential. The device supports standard replacement in existing Square D installations, offering consistent trip characteristics and compatibility within the ECC/EDB MCCB family for safe, predictable performance across demanding electrical distribution systems.