Please note that our available online inventory is only a sampling of our available in-stock inventory. If you cannot locate the product you need, please call us at 1-800-328-1842. Our sales team will be happy to find it for you.

Cutler-Hammer (Eaton) Electrical Equipment — In Stock & Ready to Ship

We stock used, surplus, and reconditioned Cutler-Hammer gear—bus plugs, breakers, switchgear, MCC buckets, and more. If you don’t see it online, call us. Online inventory is only a sampling of what’s in stock.

Call 1-800-328-1842 Request a Quote Send Photos / Nameplate for ID Help

Toll Free (24-Hour Emergency Line): 1-800-328-1842 • Local: 763-571-9005

Need the right match fast?

Send a photo of the nameplate/labels
We confirm series/frame/voltage & mounting
We quote the correct replacement/retrofit options

Tip: Include trip unit info (LSI/LSIG), lug kit/mounting, and any model stickers.

Shop by category • Popular series • Brand note • FAQs • Resources

Shop Cutler-Hammer by Category

Start here, then use the product filters below to narrow by amps, voltage, poles, and series.

Bus Plugs

Tap-offs, fusible & breaker style

Bus Duct

Busway sections & accessories

Molded & Insulated Case Breakers

Series/frames, trip units, lugs

Air Circuit Breakers

Draw-out & fixed

Vacuum Circuit Breakers

MV breakers (VCP styles)

Motor Circuit Protectors

MCPs & motor protection

MCC Buckets & Structure

Buckets, sections, parts

Low Voltage Switchgear

Lineups & components

Medium Voltage Switchgear

Lineups & parts

Low Voltage Transformers

Dry-type & related

Medium Voltage Transformers

Dry-type MV solutions

Safety Switches

Disconnects & safety

Panelboard Switches

Obsolete & hard-to-find

Fix needed: Remove/rename the “TODO” category mapping so it doesn’t show on this brand page.

Popular Cutler-Hammer Series & Common Requests

If you’re matching legacy gear, include the series/frame (FD/HFD/etc.), trip unit type, and mounting style.

Series C (FD / HFD / etc.) Quicklag (HQP) Pow-R-Way Bus Plugs (ITAP) TAP / ITAP / ZTAP Bus Plugs 9800 Series MCC Freedom Unitrol Magnum (DS / PC styles) MV Vacuum Breakers (VCP styles)

Brand Note: Eaton • Cutler-Hammer • Westinghouse

Cutler-Hammer became part of Eaton in 1978. Depending on age and application, you may see equipment labeled Eaton, Cutler-Hammer, and/or Westinghouse. When in doubt, send a nameplate photo and we’ll confirm compatibility before you buy.

Related manufacturer page: Cutler-Hammer / Westinghouse

Why EMSCO for Cutler-Hammer

Reconditioned bus plugs with a 1-year warranty (many listings are R&G and tested).
Used breakers tested with reports on common frames and part numbers.
Trip unit upgrade options (AC Pro / AC Pro II) for compatible breaker styles, including LSIG and adding ground fault where applicable.
Deep inventory & obsolete support — if it’s not online, we can often still source it from stock.

Cutler-Hammer FAQs

How do I identify my breaker frame/series (FD, HFD, etc.)?

Start with the full part number and label photo. Frame/series, poles, voltage, and AIC must match. If you’re unsure, send us the nameplate and mounting/lug photos for verification.

Why do some items show Westinghouse and Cutler-Hammer together?

Legacy equipment may be branded differently depending on era. We’ll confirm compatibility by series, dimensions, mounting, and electrical specs before you purchase.

What information should I send for fast matching?

Part number, amperage, voltage, poles, trip unit (LSI/LSIG), mounting style, and photos of lugs/line-load orientation. For bus plugs: series (TAP/ITAP/ZTAP), wire/ground, and stab configuration photos.

Can you help differentiate TAP vs ITAP vs ZTAP bus plugs?

Yes—these can look similar but are not interchangeable. Send photos of stabs, neutral position, and hanger width (if applicable) and we’ll confirm the correct series.

Do you offer trip unit upgrades or ground fault options?

In many cases, yes. We can quote AC Pro / AC Pro II trip unit options for compatible breaker styles and requirements (LSI/LSIG). Contact us with breaker details to confirm fit.

Helpful Resources

Find. Fix. Fast.

Eaton/ Cutler-Hammer Magnum DS MDNC4N Circuit Breaker 4000 Amp 600 Volt AC E/O D/O

Eaton/ Cutler-Hammer Magnum DS MDNC4N Circuit Breaker; Cat # MDNC4N3LEA 4052C NAN4Y HANAX, 4000 amp, 600 volt AC, 3 pole, electrically operated (E/O), draw-out (D/O). With Digitrip 520 trip unit- cat # 5LSIG, ground fault, 4000 amp rating plug, motor operator (110-125 VAC), auxiliary switches (4A/4B), & OTS/ Bell-Alarm. Used tested with report.

SKU: MCCB2308