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.
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
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.
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.
Filters
Seachoice AC/DC Panel Breaker With Single White Actuator
Seachoice AC/DC panel breaker (single pole) with a single white actuator—built for marine electrical protection with a 50 Amp rating. Key Features ...
View full detailsCircuit Breaker (Resettable)
Protect higher-amperage marine accessories with an inline resettable circuit breaker featuring a manual reset button. Built for 12V or 24V systems ...
View full detailsSierra CB41100 Push Button Circuit Breaker, 3 Amp, White
Sierra CB41100 push button circuit breaker is a 3 Amp, white manual-reset breaker designed for panel-mount protection and easy reset. Key Features ...
View full detailsSeachoice Mini Push to Reset Circuit Breaker, 10 AMP
Protect your boat’s electrical circuits with this Seachoice Mini Push to Reset Circuit Breaker. It interrupts current flow during overload or short...
View full detailsSeachoice 13081 Manual Reset Breaker 50 Amp
Get reliable over-current protection with the Seachoice 13081 Type III manual reset breaker—designed for 12/24V DC marine electrical systems and re...
View full detailsSeachoice 13061 Manual Reset Breaker, 30 Amp
Protect your onboard 12/24V DC circuits with the Seachoice 13061 Type III manual reset breaker. This 30 Amp push-to-reset breaker trips under overl...
View full detailsSeachoice 13071 Manual Reset Breaker, 40 Amp
Seachoice 50-13071 is a Type III manual reset circuit breaker built for marine DC electrical protection. It trips under overload and stays OFF unti...
View full detailsSeachoice Mini Push to Reset Circuit Breaker, 30 AMP
The Seachoice Mini Push to Reset Circuit Breaker is a compact, single-pole breaker designed to interrupt current flow during overload or short circ...
View full detailsSeachoice Circuit Breaker, Push to Reset, 30 Amp
The Seachoice Push-to-Reset Circuit Breaker (50-13171) is a compact, single-pole breaker engineered for marine electrical protection. When an overl...
View full detailsSeachoice Circuit Breaker, Push to Reset, 15 Amp
Protect your marine electrical circuits with the Seachoice thermal sensing circuit breaker. This push-to-reset breaker is designed for dash or swit...
View full detailsSeachoice Mini Push to Reset Circuit Breaker, 20 AMP
Protect a marine electrical circuit with this Seachoice Mini Push to Reset Circuit Breaker. It interrupts current flow under overload or short-circ...
View full detailsSeachoice 13051 Manual Reset Breaker, 20 Amp
Seachoice 13051 is a manual reset marine circuit breaker built for DC trolling motor installations. When a circuit trips, it’s designed for quick r...
View full detailsSeachoice Circuit Breaker, Push to Reset, 10 Amp
Protect sensitive marine electronics with a compact Seachoice push-to-reset circuit breaker. This thermal sensing breaker is designed for dash or s...
View full detailsSeachoice Mini Push to Reset Circuit Breaker, 15 AMP
The Seachoice Mini Push to Reset Circuit Breaker (15 AMP) is a compact single-pole breaker designed to interrupt current flow during overload or sh...
View full detailsSeachoice Circuit Breaker, Mini, Push to Reset, 5 Amp
The Seachoice Mini Push to Reset Circuit Breaker (5 Amp) provides compact, single-pole protection for marine electrical circuits. When overload or ...
View full detailsSeachoice Circuit Breaker, Push to Reset, 20 Amp
Provide reliable overcurrent protection in marine electrical panels with this Seachoice push-to-reset thermal circuit breaker. It trips on overload...
View full detailsSeachoice Circuit Breaker, Push to Reset, 5 Amp
This Seachoice push-to-reset thermal circuit breaker (5 amp) is designed for panel mounting on marine dash or switch panels. When an overcurrent co...
View full detailsMarinco Maxi-Blade Fuse
The Marinco Maxi-Blade Fuse (969-BFHD60ADSP) is a MAXI-style DC fuse designed to protect marine DC electrical systems, featuring a high interrupt c...
View full detailsMarinco Maxi-Blade Fuse
Marinco Maxi-Blade Fuse provides DC overcurrent protection with an interrupt capacity rated at 1000A DC. Key Features Maxi-blade style DC fuse for...
View full detailsMarinco Maxi-Blade Fuse
Marinco Maxi-Blade Fuse for marine electrical circuit protection, rated for up to 1000A DC interrupt capacity. Key Features Maxi-blade style fuse ...
View full detailsBlue Sea Terminal Fuse, 75 Amp, Brown
The Blue Sea MRBF Terminal Fuse (75 Amp, Brown) is a marine-rated DC protection fuse designed to help protect large battery banks and critical DC l...
View full detailsBlue Sea Terminal Fuse, 60 Amp, Gold
Protect DC battery circuits with this Blue Sea Systems MRBF Terminal Fuse—60 Amp in Gold. It’s ignition protected and includes a clear window for q...
View full detailsEasyIDâ„¢ ATO/ATC Fuse, 5A
EasyID™ illuminated ATC® blade fuses use LED technology to make it easy to spot a blown fuse—even when the fuse panel is tucked up under a dark das...
View full detailsEasyIDâ„¢ ATO/ATC Fuse, 3A
EasyID™ 3A ATO/ATC illuminated blade fuse uses LED technology to make a blown fuse easier to find—especially in fuse panels tucked under dark dashb...
View full detailsBlue Sea Terminal Fuse, 50 Amp, Red
Blue Sea Systems MRBF Terminal Fuse (50 Amp, Red) provides marine DC circuit protection with an easy-to-check clear inspection window for a visible...
View full detailsEasyIDâ„¢ATC Fuse Kit
Fast-acting easyID™ illuminated ATC® blade fuses with LED indication, designed to help you quickly spot a blown fuse—ideal for fuse panels tucked u...
View full detailsBlue Sea 5240100 Fuse ATO/ATC 7.5 Amp 25/Pk
Blue Sea 5240100 is a 7.5 Amp ATO/ATC-style fast-acting fuse pack designed for 32V DC circuits. Each fuse includes corrosion-resistant tin-plated c...
View full detailsBlue Sea Terminal Fuse, 40 Amp, Green
The Blue Sea Terminal Fuse (40 Amp, Green) provides marine-grade DC circuit protection with an ignition-protected design and a clear window for qui...
View full detailsBlue Sea 5240 Fuse ATO/ATC 7.5 Amp 2/Pk
Blue Sea Systems ATO/ATC style fuse provides fast-acting circuit protection in a convenient 2-pack for marine and 12/24V DC electrical systems. Key...
View full detailsBlue Sea Terminal Fuse, 30 Amp, Blue
The Blue Sea Terminal Fuse (30 Amp, Blue) provides reliable fuse protection for marine DC circuits, with ignition protection and a clear window for...
View full detailsBlue Sea 5239100 Fuse ATO/ATC 5 Amp 25/Pk
Blue Sea Systems 5239100 is a 5 Amp ATO/ATC style fast-acting fuse in a 25-pack, designed for DC circuit protection in marine and other 12V-class e...
View full detailsBlue Sea 5288 AGC® Glass Tube Fuse Assortment, 1ea 1/3/5/10/15 Amp
Blue Sea Systems 5288 AGC® glass tube fuse assortment is a fast-acting set designed for DC circuit protection where AGC®/ST-Glass fuse compatibilit...
View full detailsBlue Sea 5239 Fuse ATO/ATC 5 Amp 2/Pk
Protect your DC circuits with the Blue Sea 5239 fast-acting ATO/ATC fuse. This 5 Amp, 2-pack features tin-plated connector blades for corrosion res...
View full detailsFuse ANL 40 Amp
Protect your marine DC circuits with a 40 Amp ANL fuse featuring corrosion-resistant tin-plated connector blades and visible blown-condition indica...
View full detailsBlue Sea 5287 Fuse ATO/ATC Assortment, 1ea 5/10/15/20/25/30 Amp
Blue Sea 5287 Fuse ATO/ATC Assortment provides a convenient set of fast-acting blade fuses for common DC protection needs—helping you stock multipl...
View full detailsFuse ANL 35 Amp
The Fuse ANL 35 Amp is an ignition-protected ANL fuse with tin-plated connector blades designed for corrosion resistance, along with a visible indi...
View full detailsBlue Sea 5238 Fuse ATO/ATC 4 Amp 2/Pk
Blue Sea 5238 ATO/ATC 4 Amp fast-acting fuses (2-pack) provide reliable circuit protection for DC electronics. Tin-plated connector blades help res...
View full detailsFuse ANL 750 Amp
Blue Sea Systems ANL 750 Amp fuse (SKU 661-5163) provides ignition-protected DC circuit protection with visible indication of a blown fuse. Key Fea...
View full detailsBlue Sea 5237100 Fuse ATO/ATC 3Amp 25/Pk
Blue Sea 5237100 is a fast-acting ATO/ATC 3 Amp fuse pack designed to protect your marine (or compatible DC) circuits, featuring corrosion-resistan...
View full detailsBlue Sea 5285 GMA® and AGA® Mini Glass Tube Fuse, 10 Amp, 3/pk
Blue Sea Systems 5285 GMA® and AGA® mini glass tube fuse set (10 Amp, 3 per pack) with visible indication of a blown fuse for DC power distribution...
View full detailsBlue Sea 5237 Fuse ATO/ATC 3Amp 2/Pk
Blue Sea 5237 ATO/ATC fuse (3Amp) is a fast-acting blade-style fuse designed for DC electrical protection. This 2-pack helps keep spares on hand fo...
View full detailsBlue Sea 5236100 Fuse ATO/ATC 2Amp 25/Pk
Blue Sea 5236100 ATO/ATC 2Amp fast-acting fuse set (25 pack) for reliable protection of DC electronic circuits, with tin-plated blades for corrosio...
View full detailsFuse Maxi 80 Ampere
The Fuse Maxi 80 Ampere (SKU 661-5143) is a MAXI-style blade fuse designed for corrosion resistance and clear indication if the fuse is blown. Key ...
View full detailsBlue Sea 5283 GMA® and AGA® Mini Glass Tube Fuse, 5 Amp, 3/pk
Blue Sea Systems 5283 GMA® and AGA® mini glass tube fuse provides fast-acting circuit protection with a visible indication of a blown condition. Su...
View full detailsFuse Maxi 70 Ampere
Blue Sea Systems Maxi Fuse rated for 70A circuit protection. Features tin-plated connector blades to help resist corrosion and a visible indication...
View full detailsBlue Sea 5235100 Fuse ATO/ATC 1Amp 25/Pk
Blue Sea Systems 5235100 ATO/ATC blade fuse (1 Amp, 25-pack) for fast-acting circuit protection on 32V DC systems. Includes fuses with corrosion-re...
View full detailsBlue Sea 5282 GMA® and AGA® Mini Glass Tube Fuse, 3 Amp, 3/pk
The Blue Sea 5282 GMA® and AGA® mini glass tube fuse (3 Amp, 3/pk) provides compact, circuit-protecting performance with a visible indication if th...
View full detailsFuse Maxi 60 Ampere
The Fuse Maxi 60 Ampere is a blade-style MAXI fuse designed for high-current branch circuit protection in DC systems. Its corrosion-resistant tin-p...
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