Eaton/Cutler-Hammer EGH3125FFG Circuit Breaker

This EG-frame breaker is designed for use in Eaton Series G enclosures, panelboards, and switchboards. As a unit-mount, feed-thru breaker, it bolts directly to the mounting surface rather than plugging onto a busbar.

No. The FF designation in the catalog number indicates a fixed thermal and fixed magnetic trip unit. Both the continuous current overload and instantaneous short-circuit trip points are factory set and cannot be modified.

Yes, the G suffix in the catalog number confirms that standard line and load lugs are factory installed. These terminals accommodate copper or aluminum conductors ranging from 14 AWG up to 1/0 AWG.

While the breaker is rated for up to 600Y/347VAC, it is fully compatible with 240VAC systems. When applied at 240VAC, it provides a maximum interrupting rating of 100 kAIC.

The third letter in the catalog number indicates the interrupting capacity. The EGH is the high-interrupting version offering 65 kAIC at 480VAC, whereas the EGB is the standard version with a lower interrupting rating. Both share the exact same physical EG-frame dimensions.

This breaker utilizes a patented high-speed blow-open contact design. In the event of a severe fault, electromagnetic forces instantly separate the contacts to clear the fault faster than a standard mechanical trip, reducing let-through energy and protecting downstream equipment.