Square D EDB14050 NN Circuit Breaker

Square D EDB14050 NN Circuit Breaker is a 1-pole, 50 A molded‑case breaker rated for 277 VAC, part of Square D’s EDB/E‑Frame bolt‑on family. It uses thermal‑magnetic trip protection for reliable overload and short‑circuit clearance and mounts in compatible panelboards with bolt‑on installation. The breaker delivers an 18 kA interrupting capacity and is UL Listed and CSA Certified for commercial and industrial use, with a 40°C ambient rating. Terminals are aluminum lug type, with copper lug compatibility; lugs accommodate aluminum wiring from #12 to 2/0 AWG and copper wiring from #14 to 2/0 AWG. This 50 A, 277 V single‑pole device is well suited for protecting branch circuits such as 277 V lighting and other 277 V loads in panelboards where fast, reliable protection is required without sacrificing space or ease of replacement.