Schneider Electric EDB34050 Circuit Breaker

Square D by Schneider Electric EDB34050 is a 50 A, three‑pole molded‑case circuit breaker in the E‑Frame family, designed for 480Y/277 VAC systems and bolt‑on mounting for use in commercial and industrial panel distributions. This thermal‑magnetic device provides overcurrent protection and is commonly used in lighting panelboards and other distribution panels where three‑phase protection at 50 A is required. Key specs include a 50 A rating, 3 poles, 480Y/277 VAC, bolt‑on mounting, and load terminal suitability for standard 14‑2/0 AWG aluminum or copper conductors; variants may list different interrupting ratings depending on voltage and configuration. Available versions include EDB34050 (standard bolt‑on), EDB34050SA (bolt‑on with shunt trip), and EDB34050AABA (bolt‑on with auxiliary switch and alarm). The family is UL listed, CSA certified, and HOM rated, with Schneider noting discontinuation for certain references (the EDB34050AABA variant was listed as discontinued as of January 11, 2023), though sales channels may still provide existing stock or spare parts. Discrete interrupting ratings reported across sources place the standard 480Y/277 VAC version around 18 kAIC, with higher ratings (up to 25 kAIC) appearing in some documentation or at other voltages and variants. In practice, this makes the EDB34050 suitable for protecting feeders and panels in commercial electrical installations where reliable, three‑phase overcurrent protection is needed, and where bolt‑on E‑Frame breakers are preferred for robust, field‑serviceable protection in distribution equipment.