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Blue Sea 400A ANL Fuse
Blue Sea 400A ANL Fuse
Silver-Plated Copper Blades & Visual Blown Window for 12V/24V Systems
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DESCRIPTION
Heavy-Duty 400A DC Main Circuit Protection for Marine and Off-Grid Systems
The Blue Sea 400A ANL Fuse provides dependable, high-capacity overcurrent protection for demanding 12V, 24V, and 32V DC electrical systems. Engineered specifically for high-amperage applications, this heavy-duty fuse safeguards critical main battery banks, large power inverters, bow thrusters, and windlasses from catastrophic short circuits and sustained electrical overloads. Whether you are wiring a commercial marine vessel, an off-grid solar cabin, or a custom dual-battery 4WD canopy, selecting a properly rated ANL fuse is essential for system safety and longevity.
Engineered for Harsh Marine and Automotive Environments
Inferior circuit protection components often suffer from high internal resistance, voltage drop, and premature oxidation when exposed to moisture and vibration. The Blue Sea Systems 400A ANL fuse resolves these common failure points through superior materials and precision manufacturing. It features silver-plated copper connector blades that deliver exceptional electrical conductivity while actively resisting corrosion in damp, salt-air, and high-humidity environments.
The fuse element is housed within a durable, glass-reinforced composite body designed to withstand high ambient temperatures and mechanical stress. A clear central inspection window provides immediate visual confirmation of a blown fuse condition, simplifying fault diagnosis during system troubleshooting without requiring a multimeter prior to removal.
- Silver-Plated Copper Terminals: Maximises conductivity, reduces heat generation at the connection point, and prevents marine-grade corrosion.
- Visual Blown Condition Indicator: Integrated clear viewing window allows for rapid, at-a-glance status checks in tight electrical lockers.
- Forked Terminal Design: Slotted mounting blades allow for straightforward installation and replacement on compatible ANL fuse block studs without completely removing the retaining nuts.
- High-Temperature Housing: Glass-reinforced insulating body resists thermal distortion under heavy continuous loads.
- Ignition Protected: Safe for installation aboard petrol-powered boats when mounted in an appropriate ignition-protected fuse block, reducing the risk of igniting surrounding flammable vapours.
Why Upgrade to Blue Sea Systems Circuit Protection?
When managing currents up to 400A, even minor resistance at the fuse terminal can generate dangerous heat and compromise your wiring insulation. Unbranded fuses frequently exhibit inconsistent trip curves and poor terminal plating, which increases the risk of nuisance blowing or, worse, failing to open during a critical fault. Using a dedicated Blue Sea 400A ANL fuse alongside a compatible ANL fuse block ensures predictable interruption performance and secure mechanical retention under heavy road or wave vibration.
Typical High-Current Applications
Designed to pair seamlessly with Blue Sea Systems ANL fuse blocks and other standard ANL holders, this 400A fuse is suited for protecting heavy-gauge battery cables in:
- High-output 12V and 24V DC to AC inverter installations in caravans, motorhomes, and RVs
- Main battery bank positive feeds for AGM and Lithium (LiFePO4) auxiliary systems (check specific battery manufacturer interrupt ratings)
- Marine bow thrusters, anchor windlasses, and high-draw hydraulic pumps
- Heavy-duty automotive winches, commercial service bodies, and high-output alternator charge lines
Note: This listing is for a single 400A ANL fuse; compatible ANL fuse blocks and insulating covers are sold separately. Always size your fuse according to the maximum current rating of the cable being protected.
Secure Your High-Amperage DC Wiring
Protect your investment in batteries, inverters, and heavy-gauge cabling from damaging electrical faults. Add the Blue Sea 400A ANL Fuse to your electrical build today for professional-grade DC circuit protection.
SKU: BS-5136B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Fuse |
| Fuse type | ANL |
| SKU: | BS-5136B |
| Model #: | BS-5136B |
| MPN: | BS-5136B |
| Package weight: | 0.024 kg |
| Package length: | 0.1 m |
| Package width: | 0.03 m |
| Package height: | 0.02 m |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, depending on the nature of the fault and the requirements of Australian Consumer Law.
Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase and a clear description of the fault.
Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.
Making a Warranty Claim
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms and continued availability.
Australian Consumer Law
This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
DOCUMENTS
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