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    Blue Sea Systems

    Marine circuit protection, fuse holders, battery switches, busbars, and electrical distribution components designed for dependable boat systems.

    Blue Sea Systems develops dependable AC and DC electrical products for marine and specialized vehicle applications. The brand is known for practical solutions across circuit protection, power distribution, switching, and system monitoring. The Common Ground Marine selection currently focuses on Blue Sea Systems marine fuses and fuse holders, including ANL, MEGA, MAXI, Class T, and MRBF formats. Compare voltage, amperage, fuse style, and holder compatibility to protect the complete electrical circuit.

    Products from Blue Sea Systems

    206 products

    Choose the right Blue Sea Systems fuse

    Start with system voltage, expected continuous current, conductor size, and the manufacturer's specified overcurrent protection. Then select the fuse family, amp rating, and a compatible holder or terminal block. Match the fuse to the holder and confirm the available interrupt rating and installation clearances.

    Browse circuit protection

    Marine circuit protection starts with the whole DC system

    Blue Sea Systems offers several fuse formats for different installation and service requirements. Compare the electrical specification, physical format, and mating holder before ordering a replacement or building a new system.

    • ANL, MEGA, MAXI, Class T, and MRBF fuse formats
    • Fuse holders and terminal solutions for organized power distribution
    • Guidance on voltage, amperage, conductor sizing, and compatibility
    Talk to a product specialist

    Frequently asked questions

    What does Blue Sea Systems make?

    Blue Sea Systems designs AC and DC electrical products for marine and specialized vehicle applications. The current selection includes marine fuses and a fuse holder for circuit protection and power distribution.

    How do I choose a Blue Sea Systems marine fuse?

    Confirm the system voltage, required amperage, conductor size, fuse type, holder compatibility, and the protection requirements specified by the equipment manufacturer. The fuse must be appropriate for the complete circuit, not just the load.

    What is the difference between ANL, MEGA, MAXI, Class T, and MRBF fuses?

    These are different fuse formats with different physical sizes, holders, ratings, and installation requirements. Use the product documentation and your system design to select the correct format and verify that the fuse and holder are a compatible pair.

    Need a quote on Blue Sea Systems gear?

    Tell us what you're building. Our team will spec the right kit for your install and send a written quote.

    Request a quote

    Why buy from us

    We carry this brand because it earns its place on the boat.

    • Stocked for marine builds

      We focus on parts that meet the conditions boats see — not just whatever ships fastest.

    • Engineering review on request

      Send a parts list or a layout and we'll check it against your boat before you order.

    • Direct from our team

      Pricing, availability, and product questions all go through the same people who build custom harnesses and panels.

    Talk to a specialist