Porte fusible MEGA AMG Max 300A avec couvercle - AMG® Safety Fuse Block

Porte fusible MEGA AMG Max 300A avec couvercle - Dimensioned Drawing

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Blue Sea Systems

7721B-BSS

MEGA AMG Max 300 A fuse holder with cover

The BLUE SEA SYSTEMS MEGA AMG Max 300 A (7721B-BSS) fuse block is designed for protecting high-current marine electrical circuits. Certified to ISO 8846 for gas ignition protection, it ensures the safety of critical equipment. This model, which includes a cover, is ideal for demanding current applications, offering higher capacity than the 200A (7720) version in the same range.

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33,23€

33,23€ ~~40,68€~~

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In stock

Free pickup point shipping over €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

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Support service

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Technical specifications

Fuse type	MEGA
Amperage	300.0
Plage de calibre de fusible compatible	100-300
Nombre de fusibles	1.0
Couvercle de protection inclus	Oui
Protection anti-déflagrante	Oui
Flame retardant	Oui
Contact material	Tinned copper
Housing material	Flame-resistant plastic
Weight	0.07
Certifications	CE, ISO 8846
Calibre courant continu	300
Humidity Operating Range Percent	0-95% (no condensation)
Nom du fabricant	Blue Sea Systems
Marine grade	Yes
Maximale tension dc	58
Operating voltage range	12V - 58V DC
Product range	MEGA
Product type	Fuse holder
Storage Temperature Range C	-40°F to +176°F

Detailed description

Designed for high-current circuit protection in marine environments, the BLUE SEA SYSTEMS MEGA AMG Max 300 A fuse holder, part number 7721B-BSS, provides a solution for managing high currents. This model is intended for applications requiring protection up to 300 amperes, making it suitable for equipment such as windlasses, bow thrusters, or high-output alternators.

Protection and compliance

The 7721B-BSS fuse holder is certified under the Recreational Craft Directive 94/25/EC as amended by 2003/44/EC, in compliance with ISO 8846. This certification ensures protection against ignition of surrounding flammable gases, a critical safety criterion for onboard vessel systems. This level of protection is comparable to that of the same brand’s 7720 model, which is designed for 200-ampere currents, but the 7721B-BSS extends this capacity to 300 amperes for more demanding electrical systems.

Design and integration

The fuse holder is supplied with a cover, providing additional protection for connections and the fuse against spray and the marine environment. Its design allows for direct integration into electrical distribution systems, offering rapid circuit interruption in case of overload. Compared to less specialized solutions, this BLUE SEA SYSTEMS fuse holder is specifically tailored to the constraints of marine installations, where electrical reliability and safety are paramount.

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the Blue Sea MEGA AMG 300A fuse block »

Installing a MEGA AMG-type fuse block is a critical step for electrical safety in high-consumption marine installations. The Blue Sea Systems 7721B-BSS model, with its 300-amp capacity, is particularly suitable for applications such as protecting the main power supply of a windlass, bow thruster, or high-power inverter. Its ideal placement is as close as possible to the energy source, typically the service battery, to minimize the length of unprotected cable.

The ISO 8846 certification for gas ignition protection is a major asset for this component. It ensures the fuse block will not become an ignition source in potentially explosive environments, such as engine compartments. During installation, it is essential to use high-quality, crimped, and insulated terminals to ensure optimal conductivity and prevent overheating at connection points. While installation is relatively straightforward for a marine electrician, selecting the appropriate AMG fuse (sold separately) must be done carefully based on the maximum load and the cross-section of the protected cable. This model differs from its 7720 counterpart (200A) due to its higher capacity, making it indispensable for systems requiring 300-amp protection.

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MEGA AMG Max 300 A fuse holder with cover

33,23€

33,23€ ~~40,68€~~

Frequently Asked Questions

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What is the primary function of the BLUE SEA MEGA AMG Max 300 A fuse block?

The primary function of this fuse block is to provide essential protection for high-current electrical circuits in marine environments. It is designed to quickly interrupt the circuit in case of overload, thereby protecting the vessel's equipment and electrical system.

What is the maximum current rating this fuse holder can support?

This fuse holder is rated for a maximum current of 300 amperes (300 A).

Is the fuse holder supplied with a protective cover?

Yes, this fuse holder is supplied with a cover. The cover provides additional protection for the connections and fuse against water spray and marine environmental elements.

Is this fuse holder specifically designed for marine applications?

Yes, this fuse holder is specifically designed for marine environments. Its design is suited to the constraints of nautical installations, where electrical reliability and safety are paramount.

Which types of fuses are compatible with this fuse holder?

This fuse holder is compatible with MEGA AMG type fuses.

For which typical applications is this fuse holder recommended aboard a boat?

This fuse holder is recommended for protecting high-current circuits such as those for windlasses, bow thrusters, or high-output alternators.

Is this product certified for marine safety?

Yes, this fuse holder is certified under the Recreational Craft Directive 94/25/EC, amended by 2003/44/EC, and complies with ISO 8846.

Does the fuse holder provide protection against ignition of surrounding flammable gases?

Yes, this product is certified to provide protection against ignition of surrounding flammable gases, which is an essential safety criterion for onboard ship installations.

What is the part number (SKU) of this fuse holder?

The part number (SKU) for this product is 7721B-BSS.

What is the brand of this fuse holder?

The brand of this fuse holder is Blue Sea Systems.

What is the weight of this fuse holder?

The weight of this fuse holder is 0.07 kg.

In which country is this fuse holder manufactured?

This fuse holder is manufactured in Mexico.

Can this fuse holder be used with 12V or 24V systems?

Yes, Blue Sea Systems MEGA AMG fuse holders and fuses are generally designed for use with marine DC electrical systems, including 12V and 24V installations, as well as higher voltages up to 32V or 58V depending on the specific fuse used. The fuse holder itself is a holder.

Is the 7721B-BSS fuse holder an alternative to the 7720 model?

The 7721B-BSS model (300 A) is an option for higher currents than the 7720 model (200 A) from the same brand. While they share similar protection characteristics, the 7721B-BSS is designed for more demanding electrical systems requiring a 300-amp capacity.

Is specific knowledge required to install this fuse holder?

Installing any marine electrical component, including a fuse holder, requires electrical knowledge. It is recommended to use a qualified professional to ensure correct and safe installation in compliance with maritime standards.

How is the fuse holder mounted or secured?

The fuse holder is designed for direct integration into electrical distribution systems. While specific mounting details are not provided, fuse holders of this type are typically secured using screws on a flat surface.

Are installation instructions provided with the product?

The provided information does not specify whether detailed installation instructions are included. However, Blue Sea Systems products are often supplied with documentation, and resources are available on the manufacturer's website. It is always recommended to consult a professional for installation.

What is the difference between this model and the Blue Sea Systems 7720 model?

The main difference lies in the maximum supported current. The 7721B-BSS model can handle up to 300 amperes, whereas the 7720 model is designed for currents up to 200 amperes. Both models offer similar protection against gas ignition and are certified to the same standards.

Can this fuse holder be used in non-marine environments?

Although specifically designed and certified for marine environments due to safety and robustness requirements (gas ignition protection, resistance to splashes), it could potentially be used in other applications requiring similar DC current protection, provided that the technical specifications and safety standards for the intended use are met.