Eaton Cutler-Hammer GHB3040U is a three-phase molded‑case circuit breaker rated for 40 A at 480 V, configured as a 3‑pole device. It provides overcurrent protection for 3‑phase electrical circuits in industrial and commercial power distribution panels. The GHB3040U designation identifies a 40 A, 480 V MCCB from Eaton’s Cutler‑Hammer lineup.
