Square D EGB34125SA Shunt Trip Circuit Breaker

Square D EGB34125SA is a 125 A, three‑pole shunt‑trip circuit breaker from the E‑Frame family, designed for bolt‑on installation in Square D E‑Frame panelboards and switchgear. Rated for 480Y/277 VAC, it provides molded‑case, thermal‑magnetic protection for feeders and branch circuits and includes a built‑in 120 V shunt‑trip coil for remote tripping. This 3P device is intended for commercial and light‑industrial distribution systems and accepts standard E‑Frame bolt‑on mounting for straightforward integration in existing installations. The unit carries a short‑circuit rating of 35 kAIC at 480 V, delivering sufficient interruption capability for typical fault conditions in these applications.