AMI / MIDI Fuse - 70 Amp - AMI / MIDI Fuse - 70 Amp

AMI / MIDI Fuse - 70 Amp - Dimensioned Drawing

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Blue Sea Systems

5254-BSS

AMI / MIDI Fuse - 70 A

The BLUE SEA 70-amp AMI/MIDI fuse (5254-BSS) is an essential component for protecting high-current marine electrical circuits. Designed for AMI or MIDI fuse holders, it provides fast interruption in case of overload, safeguarding your equipment and wiring. It is supplied as a single unit without additional accessories.

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8,18€

8,18€ ~~9,84€~~

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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	AMI / MIDI
Amperage	70.0
Nombre de fusibles	1.0
Fuse included	Oui
Contact material	Tinned copper
Dimensions (W x H x D)	102.1 x 13.2 x 39.6 mm
Weight	0.015
Operating temperature range	-40°F to +176°F
Certifications	CE, ISO 8820-5
Domaine d'application	Marine installations
Code-barres du produit	SK-000048551
Date de création du produit	2026-05-06 21:11:41
Current type	DC
Nom du modèle	AMI / MIDI Fuse - 70 Amp
Product use	Protection of marine electrical circuits
Product type	Fuse
URL de la page produit	/shop/5254-bss-blue-sea-ami-midi-fuse-70-amp-7298
Suivi par numéro de série	none
Date de dernière mise à jour	2026-05-06 21:11:41

Detailed description

The BLUE SEA 5254-BSS 70-amp AMI/MIDI fuse is designed for protecting marine electrical circuits. It fits into AMI or MIDI fuse holders, providing rapid circuit interruption in case of overload or short circuit. This type of fuse is commonly used to protect high-current equipment such as inverters, bow thrusters, or battery charging circuits.

Protection of Marine Circuits

AMI/MIDI fuses, like this 70-amp model, provide essential protection against electrical damage. Unlike smaller ATO/ATC fuses, which are suited for low-power circuits, AMI/MIDI fuses are rated for higher currents typical of modern marine installations. BLUE SEA offers a full range of these fuses, allowing selection of the precise amperage for each application, ensuring tailored protection for the specific power draw of each piece of equipment.

Compatibility and Installation

This 70-amp AMI/MIDI fuse is compatible with fuse holders designed for this format. It is critical to ensure the fuse holder matches the AMI or MIDI type for secure installation and optimal performance. Its role is to protect devices and wiring from overcurrent, preventing risks of fire or damage to onboard electrical systems.

Documentation

Type	Nom
	EN - Full Scale Fuse Comparison (scaled 1 - 1) - AMI - MIDI Fuse - 70 Amp

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the AMI / MIDI 70 Amp fuse by BLUE SEA »

Choosing a fuse should never be taken lightly in a marine installation. The BLUE SEA 70-amp AMI/MIDI fuse is a critical safety component for high-current circuits. It is specifically sized to protect equipment such as small bow thrusters, certain inverters, or main distribution sections. Its AMI/MIDI format is a robust standard for applications requiring a higher interrupting rating than blade-type fuses. This type of fuse is typically installed close to the power source or the equipment to be protected, in a suitable fuse holder, to minimize the length of unprotected cable. It is essential to follow the manufacturer's recommended amperage to avoid both nuisance tripping and insufficient protection. This fuse is a consumable part, not intended for repair, but for systematic replacement after an overcurrent event to ensure continuous system safety.

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AMI / MIDI Fuse - 70 A

8,18€

8,18€ ~~9,84€~~

Frequently Asked Questions

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What is a 70-amp AMI/MIDI fuse?

This 70-amp AMI/MIDI fuse from BLUE SEA is an electrical protection device designed for marine circuits. Its primary function is to protect equipment and wiring from overcurrent and short circuits by quickly interrupting the circuit in case of failure. The term "AMI/MIDI" refers to its physical format, which is standardized to fit specific fuse holders.

Which marine equipment types is this fuse intended for?

This fuse is ideal for protecting high-current marine equipment. It is commonly used for applications such as:

InvertersBow thrustersBattery charging circuitsOther high-power electrical systems aboard vessels.

What is the main difference between an AMI/MIDI fuse and an ATO/ATC fuse?

The main difference lies in their current handling capacity and physical size. AMI/MIDI fuses, such as this 70-amp model, are designed for higher currents and are physically larger than ATO/ATC fuses. The latter are typically used for low-power circuits, while AMI/MIDI fuses are suited for modern marine installations requiring protection for higher currents.

Which fuse holders is this fuse compatible with?

This 70-amp AMI/MIDI fuse is compatible exclusively with fuse holders specifically designed for AMI or MIDI-type fuses. It is crucial to ensure that the fuse holder used matches this format to guarantee a secure installation and optimal performance of the electrical protection.

How to properly install this fuse in a marine circuit?

To install this fuse correctly, follow these general steps:

Disconnect power: Ensure the circuit is completely de-energized before any handling.Insert the fuse: Place the 70-amp AMI/MIDI fuse into a compatible AMI or MIDI fuse holder.Secure firmly: Make sure the fuse is properly seated and connections are tight to prevent any play or poor contact.Restore power: Once the fuse is correctly installed, you can restore power to the circuit.It is always recommended to consult your fuse holder’s installation manual or seek professional assistance if you are unsure of the procedure.

What safety precautions should I take when replacing a fuse?

When replacing a fuse, it is essential to take the following safety precautions:

Disconnect power: Always disconnect the circuit’s power source before handling the fuse.Use the correct amperage: Replace a fuse only with a fuse of the same type and same amperage (here, 70 amperes) to avoid damaging the equipment or creating a fire risk.Check the fuse holder: Ensure the fuse holder is in good condition and compatible with the type of fuse used.Never bypass: Never attempt to "bypass" a blown fuse with a wire or another conductor, as this removes protection and can cause serious damage.

Is this fuse reusable after it has blown?

No, an AMI/MIDI fuse, like any other fuse, is a single-use protective device. Once it has blown (melted) to interrupt a circuit in case of overload or short circuit, it must be replaced with a new fuse of the same type and same amp rating (70 amperes) to restore circuit protection.

Can I use this 70 amp fuse if my equipment requires a different amperage?

No, it is essential to use a fuse with an amperage that precisely matches the specifications of the equipment to be protected and the capacity of the wiring. Using a fuse with a lower amperage could lead to nuisance tripping, while a fuse with a higher amperage would not adequately protect the equipment and wiring, risking damage or fire.