⚡ ANL Fuses – Marine-Grade Overcurrent Protection for High-Power DC Systems

Protect your vessel's electrical system with premium ANL fuses, the marine industry standard for reliable overcurrent protection. Engineered to withstand the harsh saltwater environment, these marine-grade fuses are trusted by boat builders, yacht electricians, and offshore installers for critical applications including house battery banks, inverter systems, bow thrusters, windlass circuits, and high-power electrical distribution. Also ideal for RV, automotive, and off-grid solar installations requiring bulletproof DC protection from 30A to 500A.

⚓ Built for the Marine Environment

Gold-Plated Marine Contacts: Premium gold plating provides superior corrosion resistance against saltwater spray, humidity, and marine atmosphere. Unlike tin or silver-plated fuses that corrode and fail in marine conditions, gold-plated contacts maintain reliable conductivity season after season, ensuring your vessel's electrical system stays protected in the harshest offshore conditions.

Extreme Temperature Performance: Certified operation from -40°C to +125°C handles everything from Arctic cruising to tropical engine room heat. Your electrical protection won't fail when you need it most, whether you're running in frigid northern waters or dealing with high-temperature battery compartments and engine rooms.

Vibration-Resistant Design: Heavy-duty construction withstands constant marine vibration, engine harmonics, and rough sea conditions. M8 bolt-hole connections ensure secure mounting that won't loosen under way, preventing dangerous connection failures that can occur with inferior fuse designs.

🔋 Complete Amperage Range for Every Marine Application

Select the precise ABYC-compliant rating for your vessel's requirements:

Light Duty (30A-80A): 30A • 40A • 50A • 60A • 80A (Navigation electronics, VHF radio circuits, small inverters, refrigeration compressors, solar charge controllers)

Medium Duty (100A-200A): 100A • 125A • 150A • 200A (House battery mains, 1000-2000W inverters, electric winches, galley circuits, watermakers)

Heavy Duty (225A-500A): 225A • 250A • 300A • 350A • 400A • 500A (Large house banks, 3000W+ inverters, bow thrusters, windlass motors, parallel battery configurations, main distribution panels)

Each fuse is precision-manufactured to meet marine electrical standards with consistent blow characteristics and long service life, even in continuous-duty applications.

⚙️ Why ANL Fuses Are Essential for Marine DC Systems

ANL fuses are specifically engineered for high-current DC marine circuits where traditional automotive blade fuses and AC fuses fail. Marine electrical systems face unique challenges: high inrush currents from inverters, motor loads from windlasses and thrusters, sustained high currents, and corrosive saltwater environments. ANL fuses are designed to handle these demands while providing reliable short-circuit protection that can prevent catastrophic vessel fires.

Critical Marine Applications:

• House Battery Bank Protection: Main positive terminal protection for lithium, AGM, and lead-acid battery banks per ABYC E-11 standards
• Marine Inverter Systems: Input protection for pure sine wave inverters powering AC loads including air conditioning, microwaves, and power tools
• High-Current Motor Circuits: Windlass protection, bow thruster feeds, anchor winch circuits, and electric propulsion systems
• DC Distribution Panels: Main feed protection and branch circuit isolation in marine electrical distribution systems
• Parallel Battery Banks: Individual battery protection in parallel configurations to prevent reverse current flow and battery fires
• Shore Power Integration: Battery charger protection and DC distribution for hybrid power systems

✅ Technical Specifications

Voltage Rating: Up to 32V DC nominal (supports continuous voltage up to 80V) - suitable for 12V, 24V, and 48V marine systems

Amperage Options: 30A, 40A, 50A, 60A, 80A, 100A, 125A, 150A, 200A, 225A, 250A, 300A, 350A, 400A, 500A

Material: Marine-grade copper alloy with gold-plated contacts for maximum corrosion resistance

Dimensions: 80.5 × 22.5 × 8.7mm (L×W×H) - standard ANL footprint

Mounting: M8 bolt holes, plug-in style with secure vibration-resistant connection

Connection Type: Requires ANL fuse holder (sold separately) - available in standard and waterproof marine configurations

Temperature Range: -40°C to +125°C - handles engine room heat and cold climate operation

Marine Compliance: Meets ABYC E-11 standards for marine electrical systems and ISO marine requirements

🔌 ABYC-Compliant Installation Guidelines

ANL fuses must be installed in a dedicated ANL fuse holder mounted within 7 inches (178mm) of the battery positive terminal per ABYC E-11.6 standards. This critical placement ensures maximum protection by minimizing unfused cable length that could short circuit. The fuse holder should be installed in an accessible location for inspection and replacement, but protected from direct water spray and bilge water.

Marine Sizing Guidelines: Select fuse amperage based on cable gauge and connected load. For marine inverters, use a fuse rated at 1.25× to 1.5× the inverter's maximum DC current draw to handle startup surge without nuisance blowing. For motor circuits (windlass, bow thruster), account for high starting currents. Always ensure the fuse rating is less than the cable's ampacity to prevent cable overheating and potential fire hazards.

Wire Gauge Reference: Use 4 AWG minimum for 100-125A circuits, 2 AWG for 150-175A, 1/0 AWG for 200-250A, 2/0 AWG for 300A, 3/0 AWG for 350A, and 4/0 AWG for 400-500A applications. Use tinned marine-grade cable for all connections.

🛡️ Marine Safety & Insurance Compliance

Proper overcurrent protection is not just recommended – it's required by ABYC standards, marine surveyors, and insurance underwriters. ANL fuses provide the critical last line of defense against electrical fires, which are one of the leading causes of total vessel loss. A short circuit in an unprotected battery bank can generate over 10,000 amps, instantly welding cables, igniting insulation, and starting catastrophic fires that can sink a vessel in minutes.

Our marine-grade ANL fuses are specified by professional yacht electricians, boat builders, and marine surveyors worldwide. They meet insurance requirements for proper electrical protection and are recognized by classification societies and marine certification bodies. Installing proper overcurrent protection protects your vessel, your crew, and your insurance coverage.

⚓ Marine Industry Standard

ANL fuses are the worldwide standard for marine high-current DC protection, specified by ABYC standards, marine surveyors, yacht electricians, and boat builders. Trusted by commercial vessels, offshore cruisers, and recreational boaters for their proven reliability in the harsh marine environment. Our marine-grade ANL fuses meet insurance requirements and classification society standards for proper electrical protection.

🔍 Complete Your Marine Electrical System

Pair with our marine-grade ANL fuse holders (sold separately) for a complete, ABYC-compliant protection solution. Available in standard and waterproof configurations with tinned copper terminals and corrosion-resistant hardware. Add marine-grade tinned cable, adhesive-lined heat shrink, and proper strain relief for a professional installation that will last the life of your vessel.