Fuse Blocks & Fuses
Fuses and fuse blocks protect wiring from overheating and fire when a short circuit or overload occurs. The fuse should be sized to protect the wire, not just the device it powers, and placed as close to the power source as practical.
Fuse blocks keep branch circuits organized in one place. For high-current circuits such as inverters and windlasses, common choices include ANL, MRBF and Class T fuses. See also our wire gauge guide.
Browse 284 fuse blocks & fuses products in Electrical, 235 in stock and ready to ship from NJ and FL. Top brands include Blue Sea Systems, Egis Mobile Electric, Victron Energy and T-Spec. Prices range from $3.89 to $396.18. Filter by brand, price or availability, or search by manufacturer part number or UPC.
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Fuse Blocks & Fuses FAQ
How do I choose a fuse rating?
Size the fuse to protect the wire it feeds: it should be no larger than the wire's safe current-carrying capacity. Follow the equipment maker's recommendation when one is given.
Where should a fuse go?
On the positive conductor, as close to the battery or power source as practical, so the whole length of wire is protected.
Fuse or circuit breaker?
Fuses are compact and inexpensive; circuit breakers can be reset and double as switches. Many systems use both.
What is a Class T fuse for?
Class T fuses have a high interrupt rating and are commonly used on large lithium battery banks, where a short circuit can deliver very high current.