Square D EDB34045 is a 3‑pole molded‑case circuit breaker (MCCB) in the EDB family, designed for bolt‑on mounting on an E‑frame enclosure. It is rated 45 A at 480Y/277 VAC and offers a 25 kA short‑circuit interrupting rating for reliable three‑phase protection. The thermal‑magnetic trip is HACR‑rated, it accepts 14–2/0 AWG aluminum or copper conductors, and includes Visi‑Trip for fast fault indication; the unit is TAA compliant. Commonly used in lighting panelboards and NF panel installations, this model protects 3‑phase 480Y/277 VAC circuits in commercial electrical distribution.
