Obsolete Circuit Breakers: Replacement & Cross-Reference Sourcing

When a molded-case breaker is discontinued, you have two moves: cross-reference to the manufacturer's current frame, or drop in a surplus unit of the original to keep the panel as-built. Edmundson Industrial sources discontinued and legacy breakers across Square D, Eaton / Cutler-Hammer, GE, Westinghouse, and Siemens / ITE in new-surplus, used-tested, and reconditioned condition, disclosed before sale. When the modern replacement doesn't share the old footprint, our fabrication side builds the adapter brackets, filler plates, and bus work to make it fit.

Start here: brand cross-reference hubs

Brand	Common obsolete frames	Status
Square D	FA / FAL, KA / KAL, LA, HDA / HJA, MA / MH, I-Line	Square D cross-reference →
Eaton / Cutler-Hammer	EHD, FD, HFD, KD, GHB, Series C	Eaton cross-reference →
GE	TED, TEY, TEC, Spectra (SE / SG)	GE cross-reference →
Westinghouse	FB, KB, LB, Tri-Pac (now Eaton)	Westinghouse cross-reference →
Siemens / ITE	ED, FD, BQD, Sentron	Siemens cross-reference →

The most-requested obsolete numbers are industrial molded-case frames: LA36400 (400A), KAL36250 (250A), HJA36100 (100A), FA32100: low Google volume, high buyer intent, and an active surplus market. We source by family and win on availability, not search traffic.

How does obsolete breaker sourcing work?

Pull the catalog number off the breaker face or the panel schedule: the full string, not just the frame letters.
Decide: surplus drop-in or retrofit. A surplus original keeps the panel as-built with no bus or lug rework. A current-frame retrofit is the long-term path; plan it at a stop.
Send it to us. We quote condition, price, and lead time: timing confirmed with the request. If the modern breaker doesn't fit the old opening, our fabrication side makes the adapter and filler hardware so it lands in the legacy footprint.

Condition, disclosed before sale

We supply breakers as new-surplus (unused, from the secondary market), used-tested, or reconditioned to industry practice. Which one you're getting is stated up front, with photos on request.

Beyond breakers

Running obsolete controls too? See our Allen-Bradley PLC & drive cross-reference for MicroLogix, SLC 500, and PowerFlex replacements.

FAQ

Are obsolete breakers safe to install?

Condition is disclosed before sale, new-surplus, used-tested, or reconditioned, with photos on request. Used and reconditioned breakers are applied to their original ratings and verified against the panel, so you know exactly what you're installing before you commit.

Can you match a breaker that is no longer made?

Usually. Send the catalog number or a photo of the breaker face. We cross-reference the manufacturer's current frame and also quote a surplus original, so you can choose retrofit or a drop-in.

Which brands of obsolete breakers do you source?

Square D, Eaton / Cutler-Hammer, GE, Westinghouse, and Siemens / ITE molded-case breakers, in bolt-on and I-Line styles.

Do you sell reconditioned breakers?

Yes, when that is the right answer, with condition disclosed. Many customers prefer new-surplus when it is available; we quote both.

What if the replacement does not fit the old panel?

Our fabrication side makes adapter plates, mounting brackets, filler plates, and bus extensions so a current breaker lands in the legacy footprint: part and panel on one PO.

Frame-specific guides

Request a Quote

or send the catalog number or a photo of the breaker to sales@edmundsonindustrial.com · (832) 975-8827 · Houston, TX. Response timing is confirmed with the request. Line down? Say so in the subject line.

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