The Eaton HFD1040 Bolt-On Circuit Breaker is a 40-amp, 277-volt single-pole device designed for bolt-on installation in compatible Eaton panels. It uses a 1P (1PH) configuration to protect a single-phase circuit up to 40 A at 277 V. Suitable for Eaton panel systems that accept bolt-on breakers, this model is the HFD1040 designation for a 40 A, 277 V, 1-pole breaker.
