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Mini Circuit Breakers

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Mini Circuit Breakers

Miniature circuit breakers: Mini but mighty.

Miniature circuit breakers (UL 489) are a type of molded case circuit breaker that are used to protect and switch the lowest common distribution voltage in a given electrical system. They have also all but replaced fuses in most home applications since they’re far more efficient and cost effective. While their name might not suggest it, miniature circuit breakers play a large role in both residential and industrial applications. Common uses include residential lighting circuits, industrial kitchen appliances, air conditioners, and more.

Most commonly used in panelboards and load centers, they are more compact than the standard breaker, and like most molded case circuit breakers, they use an effective thermo-magnetic trip mechanisms to protect from both overcurrent situations and electric faults.

Is a miniature circuit breaker right for me?

Miniature circuit breakers can be used across a wide variety of applications since they are available as both plug-in and bolt-on (DIN rail). However, unlike other molded case circuit breakers, mini circuit breakers are not adjustable and are rated much lower (125A and below; other molded case breakers can handle up to 2,500A). Mini circuit breakers are also naturally much smaller, and also tend to be more affordable.

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Get the miniature circuit breaker

Bay Power offers a wide variety of miniature circuit breakers to meet all your residential and industrial circuit breaker needs. So whether you’re looking for a refurbished breaker or a brand new circuit breaker, you can count on Bay Power to carry a wide variety of industry-leading circuit breaker brands including Federal Pacific, ITE/Siemens, Westinghouse, Stab Lok, Crouse Hinds, Allen Bradley, and more.

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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 Mini 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 Mini 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 Mini 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 Mini Circuit Breakers.


Thanks to our extensive inventory of Mini 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 Mini Circuit Breakers shouldn’t be.

New Surplus

Our selection of new surplus Mini 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.