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Fuses

Marine Electrical Protection

Marine Fuses, Fuse Blocks & Circuit Protection

Shop marine fuses, fuse holders, fuse blocks, battery terminal fuses, ANL and MIDI fuses, breakers, bus bars, and electrical protection parts for safer 12V and 24V boat systems.

Shop Fuses Fuse Blocks ANL Fuses
Protection Check

Choose fuse style and amp rating by the protected wire, circuit load, voltage, holder type, and manufacturer recommendations.

Shop Fuse Holders

Electrical protection is safety-critical. Confirm fuse rating, wire gauge, interrupt rating, ignition protection, environment, and ABYC-style installation practices before servicing marine wiring.

Quick ShopFitmentFuse TypesInspectionInstall NotesFAQCircuit BreakersBus Bars

Fitment

Match the Fuse to the Wire and Circuit

A fuse protects the wiring, not just the device. Start with wire gauge, circuit length, load, voltage, holder style, and the equipment manual. The correct amp rating should protect the conductor while allowing normal operation.

12V Fuses 24V Fuses Marine Wire

Selection

Do Not Upsize a Fuse to Stop Nuisance Blowing

A repeatedly blown fuse usually points to overload, short circuit, corrosion, weak connections, water intrusion, failed equipment, or the wrong circuit design.

Before replacing with the same fuse, inspect the holder, terminals, wire insulation, connected device, and any recent wiring changes.

ANL

High-Current Fuses

ANL, Class T, MRBF, and MIDI styles are often used near batteries, chargers, windlasses, thrusters, and inverters.

ATC

Blade Fuses

ATO, ATC, and mini blade fuses are common in DC panels, accessory circuits, electronics, pumps, lights, and small loads.

BRK

Breakers

Marine circuit breakers can provide resettable protection, panel switching, or main-feed protection when correctly sized.

Inspection

Check the Holder, Terminals, and Heat Marks

Many electrical problems show up at connection points. A fuse can look fine while the holder, crimp, screw terminal, or bus connection is corroded, loose, overheated, or undersized.

CorrosionLook for green copper, white powder, darkened terminals, or moisture inside holders and panels.
Heat damageInspect melted plastic, brittle insulation, discolored lugs, and soft or distorted fuse bodies.
Loose connectionsLoose screws, weak crimps, and poor contact add resistance and can cause voltage drop or heat.
Wrong fuse styleUse the correct fuse form, voltage rating, amperage, and holder type for the circuit.

Installation Notes

Protect Power Close to the Source

Main battery feeds, charger outputs, windlass circuits, inverter cables, thruster feeds, and panel supply wires typically need protection close to the power source. Long unprotected runs increase risk.

Battery Fuses Battery Cable Terminal Lugs

Related Parts

Build the Circuit Around the Protection

Fuse blocks, bus bars, heat-shrink terminals, battery switches, cable glands, labels, and marine-grade wire all help keep the system serviceable and protected.

For electronics, pumps, lights, and accessories, use clean distribution and label each circuit so troubleshooting is easier later.

FAQ

Marine Fuse Questions

What does a fuse protect on a boat?

A fuse protects the wiring from overload or short-circuit current. It should be sized for the conductor and circuit design, not simply the maximum device draw.

Can I replace a blown fuse with a higher amp fuse?

No. Upsizing a fuse can allow wiring to overheat before the fuse opens. Find the reason the fuse blew and replace it with the correct rating and style.

What fuse type should I use near a battery?

Battery feeds often use high-current protection such as ANL, Class T, MIDI, or terminal fuses, depending on circuit size and equipment requirements. Match the fuse and holder to the cable and load.

Why does a fuse holder get hot?

Heat can come from loose terminals, corrosion, undersized parts, overloaded circuits, poor crimps, or incorrect fuse and holder combinations. Inspect and correct the cause before returning the circuit to service.

Ready to Protect the Circuit?

Shop Marine Fuses, Holders, Blocks & Circuit Protection

Search by fuse type, amp rating, voltage, holder style, circuit, wire size, battery protection need, or electrical accessory.

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Filters

Sierra FS84170 Marine Rated Battery Fuse, 100A, Yellow

Sierra FS84170 Marine Rated Battery Fuse, 100A, Yellow

$27.99 - $27.99
$27.99
$27.99 - $27.99
$27.99
Item locally warehoused

Sierra FS84170 is a 100A, yellow marine rated battery fuse designed to mount directly on the positive battery stud to provide DC circuit protection...

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$27.99 - $27.99
$27.99
$27.99 - $27.99
$27.99
Sierra FS84140 Marine Rated Battery Fuse, 75A, Brown

Sierra FS84140 Marine Rated Battery Fuse, 75A, Brown

$27.99 - $27.99
$27.99
$27.99 - $27.99
$27.99
Item locally warehoused

Sierra FS84140 is a marine-rated MRBF battery fuse designed to mount directly on the positive battery stud for DC main and high-current circuit pro...

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$27.99 - $27.99
$27.99
$27.99 - $27.99
$27.99
Sierra FS84120 Marine Rated Battery Fuse, 50A, Red

Sierra FS84120 Marine Rated Battery Fuse, 50A, Red

$27.99 - $27.99
$27.99
$27.99 - $27.99
$27.99
Item locally warehoused

Protect your DC battery circuits at the source with the Sierra FS84120 marine rated battery fuse (50A, red). Designed to mount on the positive batt...

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$27.99 - $27.99
$27.99
$27.99 - $27.99
$27.99
Sierra FS84020 FMX Fuse, 40A, Green

Sierra FS84020 FMX Fuse, 40A, Green

$22.59 - $22.59
$22.59
$22.59 - $22.59
$22.59
Item locally warehoused

Sierra FS84020 FMX Fuse (40A, Green) is a fast-acting, high-current automotive-style fuse designed for battery and general DC protection. Key Featu...

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$22.59 - $22.59
$22.59
$22.59 - $22.59
$22.59
Sierra FS84010 FMX Fuse, 30A, Pink

Sierra FS84010 FMX Fuse, 30A, Pink

$22.59 - $22.59
$22.59
$22.59 - $22.59
$22.59
Item locally warehoused

Sierra FS84010 FMX fuse is a fast-acting, cost-effective 30A high-current automotive fuse designed for battery and general DC power protection. Key...

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$22.59 - $22.59
$22.59
$22.59 - $22.59
$22.59

Sierra FS82070 ANL Fuse, 400 Amp

$93.99 - $93.99
$93.99
$93.99 - $93.99
$93.99
Item locally warehoused

The Sierra FS82070 ANL Fuse (400 Amp) is an ignition-protected, ceramic-body ANL fuse engineered for reliable power-distribution circuit protection...

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$93.99 - $93.99
$93.99
$93.99 - $93.99
$93.99

Sierra FS82060 ANL Fuse, 350 Amp

$94.09 - $94.09
$94.09
$94.09 - $94.09
$94.09
Item locally warehoused

High-current ANL fuse rated at 350 A, designed for robust protection in electrical power systems. It features a ceramic body for insulation and bra...

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$94.09 - $94.09
$94.09
$94.09 - $94.09
$94.09

Sierra FS82050 ANL Fuse, 300 Amp

$86.99 - $86.99
$86.99
$86.99 - $86.99
$86.99
Item locally warehoused

High-current ANL fuse designed to protect electrical power distribution systems with robust insulation and reliable contact performance. Ceramic bo...

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$86.99 - $86.99
$86.99
$86.99 - $86.99
$86.99

Sierra FS82040 ANL Fuse, 250 Amp

$86.99 - $86.99
$86.99
$86.99 - $86.99
$86.99
Item locally warehoused

High-current ANL fuse rated at 250 A for reliable protection in electrical systems. Ceramic body for insulation and brass, gold-plated elements for...

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$86.99 - $86.99
$86.99
$86.99 - $86.99
$86.99
Seachoice 11298, 300 Amp Class T Fuse

Seachoice 11298, 300 Amp Class T Fuse

$65.04 - $65.04
$65.04
$65.04 - $65.04
$65.04
Item locally warehoused

Protect DC and marine electrical circuits with this Seachoice 11298 300 Amp Class T fuse, designed for very fast acting, current-limiting fault pro...

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$65.04 - $65.04
$65.04
$65.04 - $65.04
$65.04
Seachoice 11296, 225 Amp Class T Fuse

Seachoice 11296, 225 Amp Class T Fuse

$65.04 - $65.04
$65.04
$65.04 - $65.04
$65.04
Item locally warehoused

Protect demanding marine DC circuits with the Seachoice 11296 Class T fuse, rated 225A. Built for fast, current-limiting performance and a compact ...

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$65.04 - $65.04
$65.04
$65.04 - $65.04
$65.04
Seachoice 11294 300 Amp Marine Rated Battery Fuse

Seachoice 11294 300 Amp Marine Rated Battery Fuse

$30.01 - $30.01
$30.01
$30.01 - $30.01
$30.01
Item locally warehoused

Overview These marine-rated fuses provide reliable main and auxiliary circuit protection for demanding marine electrical systems. Rated at 300 A, t...

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$30.01 - $30.01
$30.01
$30.01 - $30.01
$30.01
Seachoice 11293 250 Amp Marine Rated Battery Fuse

Seachoice 11293 250 Amp Marine Rated Battery Fuse

$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Item locally warehoused

Overview These marine-rated fuses provide main and auxiliary circuit protection in demanding environments or tight spaces. Key Features 250 Amp ma...

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$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Seachoice 11287 100 Amp Marine Rated Battery Fuse

Seachoice 11287 100 Amp Marine Rated Battery Fuse

$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Item locally warehoused

Overview Marine-rated 100 Amp battery fuse designed for main and auxiliary circuit protection in demanding environments and tight spaces. Provides ...

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$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Seachoice 11286 80 Amp Marine Rated Battery Fuse

Seachoice 11286 80 Amp Marine Rated Battery Fuse

$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Item locally warehoused

Overview 11286 80 Amp Marine Rated Battery Fuse is designed for main and auxiliary circuit protection in demanding marine environments, including a...

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$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Seachoice 11284 60 Amp Marine Rated Battery Fuse

Seachoice 11284 60 Amp Marine Rated Battery Fuse

$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Item locally warehoused

Overview 11284 60 Amp Marine Rated Battery Fuse is designed for main and auxiliary circuit protection in demanding marine environments, including a...

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$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Seachoice 11280 30 Amp Marine Rated Battery Fuse

Seachoice 11280 30 Amp Marine Rated Battery Fuse

$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31
Item locally warehoused

Overview Seachoice 11280 30 Amp Marine Rated Battery Fuse is designed for main and auxiliary circuit protection in demanding marine environments wh...

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$31.31 - $31.31
$31.31
$31.31 - $31.31
$31.31

West Marine 200-Amp Terminal Fuse (BSS-5187)

$36.39 - $36.39
$36.39
$36.39 - $36.39
$36.39
60 in stock

Heavy-duty 200-amp terminal fuse designed for marine electrical systems. Provides reliable overcurrent protection for high-amperage circuits on boa...

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$36.39 - $36.39
$36.39
$36.39 - $36.39
$36.39

Mercury MerCruiser Quicksilver 55 Amp Fuse Assembly 79023T56

$68.47 - $68.47
$68.47
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$68.47
Only 2 left!

Mercury MerCruiser Quicksilver 55 Amp Fuse Assembly 79023T56 Part Number: 79023T56 (service format: 88-79023T56) Brand: Mercury / Quicksilver Prod...

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$68.47 - $68.47
$68.47
$68.47 - $68.47
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Mercury MerCruiser Quicksilver 110 Amp Fuse Assembly 79023T10

$68.99 - $68.99
$68.99
$68.99 - $68.99
$68.99
Only 1 left!

110 Amp High-Current Fuse Assembly — OEM Reference 79023T10 / 88-79023T10 Part Number: 79023T10 | Service format: 88-79023T10 Brand: Mercury Marin...

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$68.99 - $68.99
$68.99
$68.99 - $68.99
$68.99

Volvo Penta Automatic Fuse – 874579

$64.90 - $64.90
$64.90
$64.90 - $64.90
$64.90
Only 1 left!

The Volvo Penta Automatic Fuse 874579 is a genuine OEM resettable circuit breaker designed to protect electrical systems in Volvo Penta marine engi...

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$64.90 - $64.90
$64.90
$64.90 - $64.90
$64.90

Mercury 90-Amp Fuse Assembly 8M0207795 - OEM Electrical Component

$77.24 - $77.24
$77.24
$77.24 - $77.24
$77.24
Only 3 left!

OEM Mercury 90-amp fuse assembly for reliable electrical system protection in marine applications. Part Number: 8M0207795 This genuine Mercury 90...

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$77.24 - $77.24
$77.24
$77.24 - $77.24
$77.24