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.
Protection Check
Shop Fuse Holders
Choose fuse style and amp rating by the protected wire, circuit load, voltage, holder type, and manufacturer recommendations.
Electrical protection is safety-critical. Confirm fuse rating, wire gauge, interrupt rating, ignition protection, environment, and ABYC-style installation practices before servicing marine wiring.
Popular Fuse Searches
Marine FusesReplacement fuses by style and amperage Fuse BlocksOrganized branch-circuit protection Fuse HoldersInline and panel-mount holders ANL FusesHigh-current battery and inverter circuits MIDI FusesCompact high-current protection ATO/ATC FusesCommon blade fuses for DC panels Battery Terminal FusesProtection close to the battery source Circuit BreakersResettable protection and switching Bus BarsClean power distribution points
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.
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.
High-Current Fuses
ANL, Class T, MRBF, and MIDI styles are often used near batteries, chargers, windlasses, thrusters, and inverters.
Blade Fuses
ATO, ATC, and mini blade fuses are common in DC panels, accessory circuits, electronics, pumps, lights, and small loads.
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.
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.
Marinco Maxi-Blade Fuse
Original price
$17.29
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$17.29
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$17.29
$17.29
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$17.29
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$17.29
In stock
Interrupt capacity: 1000A DC
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$17.29
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$17.29
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$17.29
$17.29
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$17.29
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$17.29
Marinco Maxi-Blade Fuse
Original price
$17.29
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Original price
$17.29
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$17.29
$17.29
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$17.29
Current price
$17.29
In stock
Interrupt capacity: 1000A DC
Original price
$17.29
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Original price
$17.29
Original price
$17.29
$17.29
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$17.29
Current price
$17.29
Marinco Maxi-Blade Fuse
Original price
$17.29
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Original price
$17.29
Original price
$17.29
$17.29
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$17.29
Current price
$17.29
In stock
Interrupt capacity: 1000A DC
Original price
$17.29
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$17.29
Original price
$17.29
$17.29
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$17.29
Current price
$17.29
Blue Sea Terminal Fuse, 75 Amp, Brown
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$35.09
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$35.09
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$35.09
$35.09
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$35.09
Current price
$35.09
In stock
Interrupt rating satisfies ABYC requirements for DC main circuit protection Appropriate for inverters, windlasses, and bow thrusters. Ignition pro...
View full details
Original price
$35.09
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$35.09
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$35.09
$35.09
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$35.09
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$35.09
Blue Sea Terminal Fuse, 60 Amp, Gold
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$35.09
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$35.09
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$35.09
$35.09
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$35.09
Current price
$35.09
In stock
Interrupt rating satisfies ABYC requirements for DC main circuit protection Appropriate for inverters, windlasses, and bow thrusters. Ignition pro...
View full details
Original price
$35.09
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Original price
$35.09
Original price
$35.09
$35.09
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$35.09
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$35.09
EasyIDâ„¢ ATO/ATC Fuse, 5A
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$12.99
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$12.99
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$12.99
$12.99
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$12.99
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$12.99
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EasyID™ illuminated ATC® blade fuses use Light Emitting Diode (LED) technology to show that a fuse has blown, making them easy to spot in fuse pane...
View full details
Original price
$12.99
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$12.99
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$12.99
$12.99
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$12.99
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$12.99
EasyIDâ„¢ ATO/ATC Fuse, 3A
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$12.99
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$12.99
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$12.99
$12.99
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$12.99
Current price
$12.99
In stock
EasyID™ illuminated ATC® blade fuses use Light Emitting Diode (LED) technology to show that a fuse has blown, making them easy to spot in fuse pane...
View full details
Original price
$12.99
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$12.99
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$12.99
$12.99
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$12.99
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$12.99
Blue Sea Terminal Fuse, 50 Amp, Red
Original price
$35.09
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$35.09
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$35.09
$35.09
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$35.09
Current price
$35.09
In stock
Interrupt rating satisfies ABYC requirements for DC main circuit protection Appropriate for inverters, windlasses, and bow thrusters. Ignition pro...
View full details
Original price
$35.09
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Original price
$35.09
Original price
$35.09
$35.09
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$35.09
Current price
$35.09
EasyIDâ„¢ATC Fuse Kit
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$96.69
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$96.69
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$96.69
$96.69
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$96.69
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$96.69
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Fast-acting easyIDâ„¢ illuminated blade fuses use LED technology to show when a fuse has blown.Tin-plated connector blades for corrosion resistance.
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$96.69
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$96.69
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$96.69
$96.69
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$96.69
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$96.69
Blue Sea 5240100 Fuse ATO/ATC 7.5 Amp 25/Pk
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$40.89
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$40.89
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$40.89
$40.89
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$40.89
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$40.89
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Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$40.89
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$40.89
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$40.89
$40.89
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$40.89
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$40.89
Blue Sea Terminal Fuse, 40 Amp, Green
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$32.16
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$32.16
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$32.16
$32.16
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$32.16
Current price
$32.16
In stock
Interrupt rating satisfies ABYC requirements for DC main circuit protection Appropriate for inverters, windlasses, and bow thrusters. Ignition pro...
View full details
Original price
$32.16
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Original price
$32.16
Original price
$32.16
$32.16
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$32.16
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$32.16
Blue Sea 5240 Fuse ATO/ATC 7.5 Amp 2/Pk
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$6.79
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$6.79
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$6.79
$6.79
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$6.79
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$6.79
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$6.79
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Original price
$6.79
Original price
$6.79
$6.79
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$6.79
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$6.79
Blue Sea Terminal Fuse, 30 Amp, Blue
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$35.09
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$35.09
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$35.09
$35.09
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$35.09
Current price
$35.09
In stock
Interrupt rating satisfies ABYC requirements for DC main circuit protection Appropriate for inverters, windlasses, and bow thrusters. Ignition pro...
View full details
Original price
$35.09
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Original price
$35.09
Original price
$35.09
$35.09
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$35.09
Current price
$35.09
Blue Sea 5239100 Fuse ATO/ATC 5 Amp 25/Pk
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$40.89
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$40.89
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$40.89
$40.89
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$40.89
Current price
$40.89
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$40.89
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Original price
$40.89
Original price
$40.89
$40.89
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$40.89
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$40.89
Blue Sea 5288 AGC® Glass Tube Fuse Assortment, 1ea 1/3/5/10/15 Amp
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$12.69
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$12.69
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$12.69
$12.69
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$12.69
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$12.69
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Fast-acting, corrosion resistant fuses. Visible indication of blown condition. 1/4" x 1-1/4".
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$12.69
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$12.69
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$12.69
$12.69
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$12.69
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$12.69
Blue Sea 5239 Fuse ATO/ATC 5 Amp 2/Pk
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$6.79
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$6.79
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$6.79
$6.79
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$6.79
Current price
$6.79
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$6.79
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Original price
$6.79
Original price
$6.79
$6.79
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$6.79
Current price
$6.79
Fuse ANL 40 Amp
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$58.39
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$58.39
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$58.39
$58.39
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$58.39
Current price
$58.39
In stock
Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. Interrupt capacity is 6000 Amps DC and 32 volts DC max...
View full details
Original price
$58.39
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$58.39
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$58.39
$58.39
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$58.39
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$58.39
Blue Sea 5287 Fuse ATO/ATC Assortment, 1ea 5/10/15/20/25/30 Amp
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$12.79
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$12.79
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$12.79
$12.79
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$12.79
Current price
$12.79
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$12.79
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Original price
$12.79
Original price
$12.79
$12.79
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$12.79
Current price
$12.79
Fuse ANL 35 Amp
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$58.39
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$58.39
Original price
$58.39
$58.39
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$58.39
Current price
$58.39
In stock
Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. Interrupt capacity is 6000 Amps DC and 32 volts DC max...
View full details
Original price
$58.39
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Original price
$58.39
Original price
$58.39
$58.39
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$58.39
Current price
$58.39
Blue Sea 5238 Fuse ATO/ATC 4 Amp 2/Pk
Original price
$6.79
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Original price
$6.79
Original price
$6.79
$6.79
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$6.79
Current price
$6.79
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$6.79
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Original price
$6.79
Original price
$6.79
$6.79
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$6.79
Current price
$6.79
Fuse ANL 750 Amp
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$94.99
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Original price
$94.99
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$94.99
$94.99
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$94.99
Current price
$94.99
In stock
Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. Interrupt capacity is 6000 Amps DC and 32 volts DC max...
View full details
Original price
$94.99
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Original price
$94.99
Original price
$94.99
$94.99
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$94.99
Current price
$94.99
Blue Sea 5237100 Fuse ATO/ATC 3Amp 25/Pk
Original price
$40.89
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Original price
$40.89
Original price
$40.89
$40.89
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$40.89
Current price
$40.89
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$40.89
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Original price
$40.89
Original price
$40.89
$40.89
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$40.89
Current price
$40.89
Blue Sea 5285 GMA® and AGA® Mini Glass Tube Fuse, 10 Amp, 3/pk
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$9.49
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$9.49
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$9.49
$9.49
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$9.49
Current price
$9.49
In stock
Visible indication of blown condition Used for 12V/24V DC applications
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$9.49
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$9.49
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$9.49
$9.49
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$9.49
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$9.49
Blue Sea 5237 Fuse ATO/ATC 3Amp 2/Pk
Original price
$6.79
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Original price
$6.79
Original price
$6.79
$6.79
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$6.79
Current price
$6.79
In stock
Fast-acting type fuses ideal for electronic devices. Tin-plated connector blades for corrosion resistance. Visible indication of blown condition. M...
View full details
Original price
$6.79
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Original price
$6.79
Original price
$6.79
$6.79
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$6.79
Current price
$6.79