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Molded Case Circuit Breakers

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Molded Case Circuit Breakers

What are molded case circuit breakers?

Molded case circuit breakers are some of the most common circuit breakers around. When your mini circuit breaker just doesn’t cut it anymore, a molded case circuit breaker, or MCCB for short, might be what you’re looking for next. While they’re used for many industrial applications due to their durability and their high current rating capacity, they are also used in residential applications.

Molded case circuit breakers protect against thermal overloads, short circuits, and ground faults. They also have adjustable trip settings, which makes them one of the more common choices of circuit breakers. While a molded case circuit breaker functions the same as any breaker, it also uses a combination of thermo-magnetic and electromagnetic trip mechanisms to effectively protect your electrical system.

Molded case circuit breaker uses and applications

Available in a wide variety of amp ratings, from as low as 75A to as high as 1200A, molded case circuit breakers can be used in many low and medium voltage heavy duty applications, including industrial and commercial applications. They are commonly installed in control panels, switchboards, and panelboards.

Same-day shipping available
24-hour emergency support
Global supplier network
Competitive pricing

Looking for a new molded case circuit breaker? Look no further than Bay Power.

Bay Power is your one-stop shop for all your molded case circuit breaker needs. We are proud to carry a wide selection of industry-leading circuit breaker manufacturers including Eaton, GE, CBI, Schneider, Federal Pacific, Crouse Hinds, ITE, Stab Lok, and more.

So whether you need an low voltage commercial circuit breaker, a medium voltage industrial circuit breaker, you can count on Bay Power to have exactly what you’re looking for.

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Please fill in the following information or contact us at (800) 699-2980 to request a free quote. Our friendly sales staff would be glad to assist you!

Why Bay Power

Sell to Us

Sell to Us

Fill your wallet, not the landfill.

Have any old or unused Molded Case Circuit Breakers lying around? Don’t get rid of them just yet. While we stock a wide range of quality electrical products and solutions, both new and reconditioned, we also buy back your unwanted equipment. So, before deciding what to do with your old Molded Case Circuit Breakers and components, have one of our expert technicians take a look to see if we can save a few parts, save the environment, and save you some cash.

Sell to Us



Great service shouldn’t end after the purchase. We pride ourselves on the relationships we build with our customer-first mentality and the quality of our Molded Case Circuit Breakers and components. That’s why we offer a 1-year replacement warranty on all of our electrical products and solutions from the top manufacturers. Because when you buy with Bay Power, you buy with confidence.

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Buying Options

Buying Options

We are proud to stock a variety of competitively priced, new and reconditioned components from the leading manufacturers of Molded Case Circuit Breakers.


Thanks to our extensive inventory of Molded Case Circuit Breakers and components, our resourceful and expertly trained staff will always be able to get the products that you need. Through our extensive network of suppliers, we are able to carry and acquire a huge variety of electrical products and solutions, so chances are if you need it, we can get it.


Bay Power’s priority is providing you with reliable, high quality electrical hardware. That’s why our mission is to make sure our reconditioned electrical products and solutions function as perfectly as the day they were built. Because while the quality is high, the cost of Molded Case Circuit Breakers shouldn’t be.

New Surplus

Our selection of new surplus Molded Case Circuit Breakers may not arrive brand new in a box, but they function just as well, and have never had electricity run through them. All of the quality, none of the packaging, always with our 1-year replacement warranty.