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    Class RK1 Fuses

    Looking for Class RK1 Fuses? Get a quote fast.

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    Get the job done with a Class RK1 fuse.

    One of the differentiating factors of Class RK1 fuses is that they are a rejection fuse, also known as a Class R fuse. This means that it is outfitted with special provisions that keep it from being installed in the wrong fuse block. As a current limiting fuse, Class RK1 fuses introduce an extra level of resistance during an overload, reducing the damage and duration of the current. Class RK1 fuses are available in both voltage ratings as either a 250V fuse or 600V fuse. RK1 fuses are also closely related to Class RK5 fuses, though a RK1 fuse would be considered an upgrade.

    An industrial fuse for industrial-grade applications.

    Used across a number of industrial applications, Class RK1 fuses are available as either a time delay fuse or a fast acting fuse. They are used for everything from power distribution to branch circuits, feeders, motor protection, and more. With current ratings as high as 600A, Class RK1 fuses are equipped to interrupt at least 200,000 amps. Fast acting Class RK1 fuses are recommended for power distribution loads and branch circuits that are responsible for heating and lighting. Time delay Class RK1 fuses are high performance fuses built with a dual element and provide more effective and safer overcurrent protection.

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

    Welcome to your new favourite fuse shop.

    You and your fuse box deserves quality Class RK1 fuses that you can rely on. With our extensive selection of brand new Bussmann fuses and Bussmann fuse holders, you’ll get the the impeccable customer service of Bay Power combined with quality fuses from one of the industry’s top fuse manufacturers. Because when you buy fuses with us, you get the expertise and value that comes with the Bay Power experience.

    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

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    Sell to Us

    Fill your wallet, not the landfill.

    Have any old or unused Class RK1 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 RK1 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 RK1 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 RK1 Fuses.


    Thanks to our extensive inventory of Class RK1 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 RK1 Fuses shouldn’t be.

    New Surplus

    Our selection of new surplus Class RK1 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.