Fuses and fuse holders

5 picks with specs, filters and a calculator to find the right size.

Small inline fuses protect electronics. An inverter needs a big ANL or class T fuse right at the battery.

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Blue Sea Systems

Blue Sea Systems 5065 Inline ATO/ATC Holder

Up to 30 A12 AWG leadsWaterproof

A sealed inline holder for blade fuses on fish finders, lights and pumps. Fuses are sold separately.

Best for: Fish finders and small accessories.

Check price on Amazon (paid link) Specs from bluesea.com
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Blue Sea Systems

Blue Sea Systems 5005 ANL Fuse Block

35 to 300 A fuses32 V DCInsulated cover5/16 in studs

Holds an ANL fuse for inverters and big DC loads, with a cover that meets ABYC and USCG insulation rules.

Best for: Inverters up to about 2,000 W on 12 V.

Check price on Amazon (paid link) Specs from solar-electric.com
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Blue Sea Systems

Blue Sea Systems Class T Fuse Block

110 to 200 A or 225 to 400 A160 V DCFast-actingInsulated cover

Class T fuses react fastest and can stop the huge currents a lithium bank can deliver in a short circuit.

Best for: Lithium banks feeding large inverters.

Check price on Amazon (paid link) Specs from bluesea.com
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Blue Sea Systems

Blue Sea Systems 5191 MRBF Terminal Fuse Block

30 to 300 A fuses58 V DCMounts on a 3/8 in battery post

Bolts straight onto the battery post, so the fuse is as close to the battery as it can get. A tidy way to protect a trolling motor or inverter cable. Fuses are sold separately.

Best for: Trolling motor and inverter cables in tight battery boxes.

Check price on Amazon (paid link) Specs from bluesea.com
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Blue Sea Systems

Blue Sea Systems ST Blade 12-Circuit Fuse Block

12 circuits30 A per circuit, 100 A total32 V DCNegative bus

One fused feed for all your small electronics: fish finders, lights, pumps and USB outlets, each on its own blade fuse, with a matching negative bus. A cover is optional.

Best for: Wiring several accessories neatly.

Check price on Amazon (paid link) Specs from defender.com

Pictures are our own illustrations, not photos of the actual products. Specs come from the manufacturer or retailer listing linked on each card and were checked in October 2026. Models and prices change, so confirm details on the listing before you buy. As an Amazon Associate I earn from qualifying purchases.