Eaton / Cutler-Hammer GD2040 Molded Case Circuit Breaker

Yes. Eaton acquired the Cutler-Hammer brand, and the GD2040 is the exact same Series C molded case circuit breaker. It serves as a direct, drop-in replacement for legacy Cutler-Hammer models with the same catalog number.

The GD2040 is a standard unit mount breaker, while the GDB2040 is specifically designed as a bolt-on version for panelboards. Both share the same 480V rating, interrupting capacity, and time-current curves, but their mounting configurations differ.

While GD and GHC breakers are both G-frame devices with similar profiles, they are not always direct substitutes. The GHC carries HID (High Intensity Discharge) and SWD (Switching Duty) ratings that the GD frame lacks, so they cannot be interchanged if your application requires those specific lighting ratings.

This G-frame breaker features a feed-thru, unit mount design. It bolts directly to a base plate or mounting bracket within Eaton Series C panelboards, motor control centers, or standalone enclosures, rather than snapping onto a DIN rail or plugging into a busbar.

Yes, in addition to its standard AC ratings, this breaker is UL listed for DC systems. It provides an interrupting capacity of 10 kAIC at 125/250 VDC, making it appropriate for specific industrial control and battery circuits.

No. This breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip functions are factory calibrated for 40 amps and cannot be adjusted in the field.

This Series C breaker is designed for use in Eaton and legacy Cutler-Hammer distribution equipment. It is commonly installed in Series C panelboards, motor control centers, switchboards, and industrial enclosures that accept G-frame unit mount breakers.

The factory-installed line and load lugs accept copper or aluminum conductors ranging from 14 AWG to 1/0 AWG. Always ensure the wire is properly torqued according to the manufacturer specifications printed on the breaker label.