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    Class J Fuses

    Looking for Class J Fuses? Get a quote fast.

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    Do I need a Class J fuse?

    When you need a high performance fuse, it’s time for a Class J fuse. They are 600V fuses and are available with current ratings that range between 1A and 600A. Class J fuses are used throughout industrial and commercial applications, especially when the demands placed on the circuits is high. One of the advantages of a Class J is its size. Compared to a Class R fuse, another high performance fuse, it takes up far less space.

    Common applications for Class J fuses include motor circuits, transformer circuits, general purpose circuits, and lighting circuits. They are also used to protect motor starters, contactors, and circuit breakers with lower interruption ratings.

    For high performance applications.

    A Class J fuse has exceptionally high current limiting capabilities, meaning it introduces an additional level of current resistance during an overload, effectively reducing the duration and damage of the overload. These high performance fuses can be either time delay or fast-acting fuses, depending on your system requirements and preferences. Time delay fuses have a more flexible threshold, in that their action depends on the time it takes for the heat from the overload to melt the element, while fast-acting fuses react to overloads much quicker.

    Same-day shipping available
    24-hour emergency support
    Global supplier network
    1-year Warranty

    High quality Class J fuses. High class customer service.

    Your electrical system deserves the best, so why settle for anything less? Bay Power has Class J fuses to meet all specifications and preferences. We proudly carry a vast selection of Bussmann fuses, Bussmann fuse holders and fuse boxes, so you know you’re getting the quality and reliability that comes with one of the top fuse manufacturers on the market today. Whether you need to buy a reconditioned fuse or a new fuse, Bay Power

    Request a Quote

    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 Class J Fuses 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 Class J Fuses 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 Class J Fuses 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

    Product Condition FAQ

    We are proud to stock a variety of competitively priced, new and reconditioned components from the leading manufacturers of Class J Fuses.


    Thanks to our extensive inventory of Class J Fuses 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 Class J Fuses shouldn’t be.

    New Surplus

    Our selection of new surplus Class J Fuses 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.