MRBF Terminal Fuse - 125A - MRBF Terminal Fuse - 125A

MRBF Terminal Fuse - 125A - Dimension Drawing

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Blue Sea Systems

5184-BSS

MRBF terminal fuse - 125 A

Designed for protecting high-current circuits, the Blue Sea MRBF 125A terminal fuse provides a compact and secure solution. It mounts directly on the battery terminal, minimizing cable lengths and risks. This fuse is an essential component for marine electrical installations requiring reliable protection up to 125 amperes.

Retail priceBenefit from the professional rate

17,72€

17,72€ ~~21,78€~~

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In stock

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

Custom installation

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Installers near you

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Support service

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Technical specifications

Fuse type	MRBF
Nominal voltage	58
Amperage	125.0
Pouvoir de coupure en court-circuit	10.0
Nombre de fusibles	1.0
Mounting type	At dock station
Taille des goujons	8
Taille du filetage des bornes	8
Fuse included	Oui
Protection anti-déflagrante	Oui
Flame retardant	Oui
Conformité ABYC	Oui
Contact material	Tinned copper
Housing material	Thermoplastic polymer
Couple de serrage recommandé des bornes	11.3
Dimensions (W x H x D)	27.8 x 16.3 x 23.0 mm
Weight	0.025
Operating temperature range	-40 to +85
Certifications	CE,UL
Electrical Protection Type	Overcurrent protection
Installation Benefit Cable Reduction	Reduces the length of unprotected cables
Méthode d'installation	Directly on battery post
Intended use	Protection for high-current marine electrical circuits
Maintenance Ease	Easy replacement
Environnement d'application du produit	Marine
Product type	Fuse
Poids net du produit	25
Protected Equipment Types	DC-DC converters, bow thrusters, windlasses
Type de borne	Dowel

Detailed description

The Blue Sea MRBF 125A terminal fuse is a protection solution for high-current marine electrical circuits. Designed for direct installation on the battery terminal, it secures high-power equipment such as inverters, bow thrusters, or windlasses.

Protection and integration

Unlike classic inline fuses requiring separate fuse holders, the MRBF (Marine Rated Battery Fuse) concept integrates the fuse directly onto the terminal. This design optimizes space, reduces the length of unprotected cables, and simplifies wiring. Its 125-amp capacity makes it suitable for medium to high-power applications, offering a compact alternative to bulkier ANL or blade-type fuses for similar current ratings.

Marine installation safety

This type of fuse is an essential safety component, preventing overcurrents that could damage equipment or, in the worst case, cause fires. In the event of overload or short circuit, the MRBF 125A fuse interrupts the circuit, protecting the entire electrical system and connected devices. It is easily replaceable, ensuring quick and efficient maintenance at sea.

Documentation

Type	Nom
	EN - Full Scale Fuse Comparison (scaled 1 - 1) - MRBF Terminal Fuse - 125A

Expert opinion

Pol CONIN

Digital Manager

« High-intensity protection for battery terminal »

Blue Sea's MRBF terminal fuse, particularly the 125A model, is a technically sound choice for protecting main circuits in modern marine installations. Its primary advantage lies in its design, which allows direct mounting on the battery terminal. This architecture minimizes the length of unprotected cable between the power source and the fuse point, a fundamental requirement in marine electrical safety to reduce the risk of fire in the event of an upstream short circuit.

This type of fuse is ideal for applications requiring high current protection in a confined space, such as powering a mid-sized 12V/230V inverter, a compact bow thruster, or a windlass. It offers a more compact and often easier-to-integrate alternative to ANL or MIDI fuse holders for similar current ratings, while providing reliable protection. During installation, it is critical to ensure proper tightening of connections to avoid excessive resistance and overheating.

It is less suitable for very low-current circuits or applications requiring integrated multi-circuit protection, where fuse blocks or more complex circuit breakers would be preferable. For currents above 200-300A, other solutions such as ANL fuses or specific circuit breakers may be considered, but for the 50A to 200A range, the MRBF is often an optimal solution in terms of space and safety.

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MRBF terminal fuse - 125 A

17,72€

17,72€ ~~21,78€~~

Frequently Asked Questions

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What is an MRBF terminal fuse?

MRBF stands for 'Marine Rated Battery Fuse'. It is a type of fuse designed specifically for marine applications, installed directly on the battery terminal. This design provides compact and efficient protection for high-current circuits, reducing the length of unprotected cables and simplifying wiring.

What is the rated current of this fuse?

This Blue Sea MRBF terminal fuse has a rated current of 125 amperes (125A).

For which types of marine equipment is this fuse recommended?

This fuse is ideal for protecting high-power marine equipment such as inverters, bow thrusters, windlasses, and other devices requiring overcurrent protection.

What are the advantages of the MRBF fuse compared to other types of marine fuses?

The MRBF fuse offers several key advantages:

Reduced footprint: It installs directly on the battery terminal, eliminating the need for a separate fuse holder and optimizing space.

Improved safety: It reduces the length of unprotected cables between the battery and the fuse.

Simplified installation: Its integrated design simplifies wiring.

High-current protection: It provides reliable protection for high currents in a compact format, acting as an alternative to bulkier ANL or blade fuses.

Is this fuse ignition protected?

Yes, Blue Sea Systems MRBF fuses are designed to be ignition protected, meaning they are suitable for use in engine compartments where flammable vapors may be present, in compliance with marine safety standards.