Cutler-Hammer HFD3040 U Molded Case Circuit Breaker

The Cutler-Hammer HFD3040 operates as a molded case circuit breaker intended to safeguard critical electrical circuits by isolating them during malfunction events such as overloads or short circuits. This specific model carries a continuous current rating of 40 amperes and withstands potential voltages up to 480 volts across a three-pole configuration suitable for 3-phase industrial power systems. Its construction utilizes a U-frame enclosure which facilitates mounting into compatible switching assemblies found in commercial buildings and manufacturing plants to manage high-load demands effectively. The integrated protective mechanisms enforce consistent current limits to prevent downstream components including conductors, motors, and control panels from sustaining thermal stress or destructive energy surges during fault conditions. This configuration ensures stable electrical continuity for heavy-duty equipment requiring uninterrupted service in high-voltage sectors without compromising the integrity of the broader power grid.