The Best Wholesale Source for Circuit Breakers, Hardware and Accessories

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MCB keeps thousands of electrical parts in stock. Our dedicated staff can locate hard to find equipment and drop ship nationwide.

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Controls/Accessories including: filler plates, shunts, lugs, ground bars, starters, contactors, heaters, coils, carbon brushes, fire-stop systems.

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Circuit Breakers including: new, reconditioned, used, circuit protectors, switches, shunts, and more. We carry all manufacturers, residential, industrial, foreign and domestic.

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Enclosures and Switches including: NEMA 1, NEMA 3R, disconnects, transfer switches, and special orders upon request.

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Our hardware kits are competitively priced. Kits are available for new and vintage panels.  Custom kits are available upon request.

Circuit Breaker Wholesale Distributor

frontpage-buildingWe stock a wide range of circuit breakers, mounting hardware and accessories from a variety of manufacturers. Because we sell to electrical distributors our prices are very competitive and our service is unsurpassed.

Maine Circuit Breaker takes pride in their service, ensuring all in-stock products ordered by 4:00 p.m. will ship the same day. With our combination of experience, knowledge and a large network of suppliers we can handle all of your requests; residential, industrial, new, reconditioned, used and hard-to-find electrical items.

If you are an electrical distributor and would like to receive our catalog or access to our online ordering system, please contact us. We look forward to working with you.

Brands In Stock

We stock circuit breakers and electrical equipment from these manufacturers and more:

  • Cutler Hammer
  • Murray
  • American/FPE
  • Square D
  • General Electric
  • Wadsworth
  • Thomas & Betts
  • Zinsco
  • Siemens
  • UBI

We are not an authorized distributor of any of the above manufacturers

Maine Circuit Breaker Informercial

What Our Customers are Saying ...

First off your customer service is great. Your staff has always been fast and friendly.
Typically you have what we are looking for in stock.


Hours and Location

59B Banair Road
Bangor, Maine 04401

Ten Mile, Tennessee

Toll Free Phone:


[email protected]
Open Mon – Fri, 8am to 5pm EST
24 Hour Emergency Service Available