Eaton / Cutler-Hammer Circuit Breaker Cross-Reference

Eaton (and its Cutler-Hammer and Westinghouse lineage) has retired generations of molded-case breakers: the EHD, GHB, FD / HFD, and KD / HKD Series C frames among them. The modern path is Eaton's current molded-case line (Series C continuations and the Power Defense / PXR family) selected by amp and interrupting rating. For every frame, Edmundson Industrial sources new-surplus, used-tested, and reconditioned breakers so you can drop in the original or retrofit to current.

Legacy frame → modern replacement

Legacy frame	Amp range	Current path	Example catalog
EHD (E-frame)	to 100 A	Current Eaton / Power Defense	EHD3020
GHB (G-frame)	to 100 A	Current Eaton G-frame	GHB3030
FD / HFD (F-frame, Series C)	to 225 A	Current Eaton F-frame / Power Defense	FD3100, HFD3100
KD / HKD (K-frame, Series C)	to 400 A	Current Eaton K-frame / Power Defense	KD3250

Amp ranges are nominal: the catalog number encodes poles, voltage, amp rating, and interrupting class. Confirm against the nameplate before substituting.

How do you read a Eaton / Cutler-Hammer catalog number?

Eaton catalog formats vary by series (Series C and earlier Westinghouse-derived numbers differ), but the letters identify the frame and interrupting class and the trailing digits give poles and amp rating. The H prefix (HFD, HKD) marks the higher-interrupting version of the frame: match or exceed the original interrupting rating, not just the amp rating.

Catalog	Frame / type	Notes
FD3100	F-frame, Series C	3-pole, 100 A; HFD3100 is the high-AIC version
KD3250	K-frame, Series C	3-pole, 250 A; HKD is the high-AIC version
GHB3030	G-frame branch	3-pole, 30 A; common 277/480 V breaker
EHD3020	E-frame	3-pole, 20 A

Demand lives on the surplus market

Industrial Eaton / Cutler-Hammer numbers like FD3100, HFD3100, KD3250, and GHB3030 are low-volume on Google but high-intent, with steady secondary-market liquidity. For obsolete breakers, marketplace availability, not search traffic, is the real demand signal, which is why we compete on stock and sourcing speed.

Drop-in original or retrofit?

A surplus original keeps a panelboard or MCC bucket exactly as-built. A current Eaton frame (Series C or Power Defense) is the long-term path but can change the footprint, especially across series. When it does, our fabrication side makes the adapter brackets and filler plates so the new breaker fits the old opening: part and panel on one PO.

FAQ

Are Eaton / Cutler-Hammer breakers like FD and KD obsolete?

Many legacy Series C frames (EHD, GHB, FD / HFD, KD / HKD) are mature or discontinued. New-surplus, used-tested, and reconditioned units remain available through Edmundson Industrial, and we cross-reference to current Eaton frames.

What replaces an Eaton FD or KD breaker?

Current Eaton molded-case frames (Series C continuations or Power Defense) by amp and interrupting rating. We also source the original FD / KD surplus to keep a panel as-built.

Can you source a specific number like FD3100 or KD3250?

Yes: these are common industrial catalog numbers on the surplus market. Send the exact string and we'll quote new-surplus, used-tested, or reconditioned with condition disclosed.

Do you handle Cutler-Hammer and Westinghouse too?

Yes: Cutler-Hammer and Westinghouse molded-case lines are part of the same Eaton lineage. We source and cross-reference all three.

Will a current Eaton breaker fit my old panel?

Often, but footprints changed across series. Our fabrication side makes adapter and filler hardware so a current breaker fits the legacy opening.

Request a Quote

or send the catalog number off the breaker to sales@edmundsonindustrial.com · (832) 975-8827 · Houston, TX. Response timing is confirmed with the request.

Related cross-reference pages

Send the catalog number off the breaker.

Condition disclosed before sale. Response timing is confirmed with the request.

Request a Quote