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Blue Sea 32VDC 300A MEGA/AMG Fuse Block Safety Suit
Blue Sea 32VDC 300A MEGA/AMG Fuse Block Safety Suit
Ignition Protected with Sealed Cover & M8 Studs (Fuses Excluded)
Regular price
$51.30
Availability:
Special Order
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DESCRIPTION
Heavy-Duty Marine and Off-Grid Circuit Protection
The Blue Sea Systems 7721B Safety Fuse Block is engineered for demanding electrical systems where safety and reliability are paramount. Designed specifically to house high-amperage MEGA and AMG bolt-down fuses, this unit provides robust overcurrent protection for main DC feeds, large inverters, windlasses, and bow thrusters. Operating up to 32V DC, it is effortlessly compatible with both 12V and 24V electrical architectures common in marine vessels, 4WDs, caravans, and off-grid setups.
Ignition Protected for Hazardous Environments
Unlike standard automotive fuse holders that leave conductive components exposed or lack proper sealing, this safety fuse block is ignition protected. This makes it safe for installation aboard petrol and diesel-powered boats, significantly reducing the risk of igniting surrounding flammable gases in engine rooms or battery compartments. The sealed insulating cover shields the fuse from harsh marine moisture and salt spray while satisfying strict ABYC and USCG insulation requirements to prevent accidental short circuits.
Key Features and Benefits
- Ignition Protected Design: Safe for installation in enclosed compartments on petrol or diesel-powered vessels.
- Sealed Insulating Cover: Protects against harsh marine environments, moisture ingress, and accidental tool contact.
- Multi-Directional Wire Access: Features removable cover breakouts that allow heavy-gauge cable routing from multiple directions for clean installations.
- Heavy-Duty Terminations: Equipped with 5/16" (M8) stainless steel terminal studs that resist corrosion and accommodate large lugs up to 4/0 AWG (approx. 95mm2) cable.
- Integrated Cover Tether: A flexible yellow retention strap ensures the transparent cover will not get lost during fuse inspection or replacement in tight spaces.
- System Labelling Support: Recessed area on the cover accepts Blue Sea Systems Square Format standard or custom labels for clear circuit identification.
Engineered for High-Current Reliability
When managing circuits up to 300A, poor connections can lead to severe voltage drop, heat build-up, and potential thermal failure. Standard unsealed fuse blocks often suffer from corrosion and mechanical stress when paired with heavy battery cables. The Blue Sea 7721B addresses these vulnerabilities by utilizing robust 5/16" (M8) stainless steel studs capable of handling high torque settings, ensuring superior conductivity and secure mechanical fastening.
Installation is straightforward thanks to integrated mounting holes for secure attachment to flat surfaces or bulkheads. The customisable breakout tabs on the clear cover provide installers with the flexibility needed to route thick, stiff 4/0 AWG (approx. 95mm2) cables without placing undue strain on the fuse block chassis. Please note that MEGA or AMG fuses are sold separately, allowing you to select the exact amperage rating required for your specific wire gauge and appliance load.
Ideal Applications
- Main battery bank protection in marine vessels, RVs, and camper trailers
- High-current circuit protection for 12V and 24V DC-to-AC inverters
- Safeguarding anchor windlasses, winches, and hydraulic pumps
- High-output alternator charge lines and DC distribution trunks
Secure Your Electrical System
Upgrade your primary circuit protection with the Blue Sea 32V DC 300A Safety Fuse Block today to ensure safe, compliant, and dependable power distribution across your marine or off-grid electrical system.
SPECIFICATIONS
Specifications
| Specification | Value |
|---|---|
| Maximum Amperage | 300A |
| Maximum Voltage | 32V DC |
| Recommended Stud Torque | 120 in-lb (13.56 Nm) |
| Terminal Screw | 5/16″ (M8) |
| Terminal Stud Size | 5/16″ (M8) |
| Weight | 0.07 kg |
| SKU: | BS-7721B |
| Model #: | BS-7721B |
| MPN: | BS-7721B |
| Package weight: | 0.084 kg |
| Package length: | 0.1 m |
| Package width: | 0.08 m |
| Package height: | 0.05 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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Blue Sea 35-300A ANL Fuse Holder with Insulating Cover
Regular price$41.40
Availability: Special Order