Blue Sea Fuse Blocks & Fuses
Blue Sea Systems Fuse Blocks & Fuses in Annapolis
Blue Sea fuse blocks, fuse holders, and replacement fuses for marine DC systems, from ATC/ATO blade fuse blocks for branch circuits up to MAXI, MEGA/AMG, and Class T fuses for high-current battery and inverter feeds. Class T fuses are a common choice right at the battery on lithium banks, where available fault current is high.
Call (410) 263-0807 for help choosing fuse type and size for your battery bank or inverter. We design and install fused DC distribution throughout Annapolis and the Chesapeake Bay.
Related: all Blue Sea Systems | busbars & connectors | lithium battery installation
Blue Sea Fuse Blocks & Fuses FAQ
What is a fuse's interrupt rating, and why does it matter?
The interrupt rating is the most fault current a fuse can safely break. A large battery bank, especially lithium, can deliver enormous current in a dead short, and a fuse with too low a rating may fail to clear it. That's why high-interrupt fuses like Class T are used on big battery feeds; see our lithium battery installation page.
Can I replace a blown fuse with a bigger one?
No. The fuse is sized to protect the wire, and a larger fuse lets that wire overheat before anything trips. A fuse that keeps blowing points to a fault or an overloaded circuit, so find the cause first.
Where should a fuse block be mounted?
Put it in a dry, accessible spot where you can see and replace fuses easily. The cable feeding the block needs its own fuse or breaker near the battery, sized to that cable. A matching negative busbar nearby keeps the return side just as tidy.
