AMI / MIDI Fuse - 80 Amp - Dimensioned Drawing

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Blue Sea Systems

5255-BSS

AMI / MIDI Fuse - 80 A

Designed for protecting marine electrical circuits, the Blue Sea 80-amp AMI/MIDI fuse (5255-BSS) provides fast interruption in case of overload or short circuit. It is ideal for securing high-current equipment and wiring on boats. This product includes only the 80-amp AMI/MIDI fuse.

Retail priceBenefit from the professional rate

£6.52 GBP

£6.52 GBP ~~£7.25 GBP~~

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In stock

Free pickup point from €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

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Fuse type	AMI/MIDI
Amperage	80.0
Nombre de fusibles	1.0
Fuse included	Oui
Protection anti-déflagrante	Oui
Flame retardant	Oui
Conformité ABYC	Oui
Contact material	Tinned copper
Housing material	High-temperature polymer
Couple de serrage recommandé des bornes	4.5
Weight	0.015
Operating temperature range	-40°F to +185°F
Certifications	CE,UL
Actif	Yes
Application Environment	Marine professional
Code-barres du produit	SK-000048585
Current type	DC
Catégorie Odoo	Merchandise / NAVICO GROUP / 13 - Blue Sea BSS (35)
Product use	Protection for marine electrical circuits
Product type	Fuse
Vente autorisée	Yes
Quantité virtuelle disponible	0

Detailed description

The Blue Sea 80-amp AMI / MIDI fuse (part number 5255-BSS) is designed for protecting marine DC electrical circuits. It provides rapid current interruption in the event of overload or short circuit, safeguarding sensitive equipment and wiring from damage. This type of fuse is commonly used in applications requiring high protection in compact spaces.

Integration and role in electrical systems

Blue Sea Systems’ AMI (Ampere Interrupting) and MIDI (Medium Interrupting) fuses are specifically suited for high-power installations, such as main power lines, inverter circuits, or charging systems. Compared to ATO/ATC fuses, they are rated for higher currents and offer superior interrupting capacity, critical for marine equipment safety. This 80-amp model fits into compatible AMI/MIDI fuse holders, ensuring secure connections and simplified maintenance.

Comparison and positioning

In the Blue Sea Systems range, AMI/MIDI fuses occupy the space between small fuses (such as ATO/ATC) and very high-current fuses (like ANL). While ANL fuses are preferred for very high-power applications (several hundred amps), the 80A AMI/MIDI fuse provides an intermediate solution for circuits requiring robust protection without the bulk of ANL fuses. It is therefore ideal for high-consumption secondary lines or as primary protection for medium-sized installations.

Documentation

Type	Nom
	EN - Full Scale Fuse Comparison (scaled 1 - 1) - AMI - MIDI Fuse - 80 Amp

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis: Blue Sea 80A AMI/MIDI fuse for DC protection »

Blue Sea’s 80-amp AMI/MIDI fuse is a critical component for securing mid-power marine DC electrical systems. Its design is optimized for critical circuits such as the power supply for a small windlass, bow thruster, or moderate-capacity 12V/230V inverter. The main advantage of this fuse format lies in its balance between interrupting capacity and compact size, allowing installation in spaces where an ANL fuse would be too large.

During installation, it is essential to use a compatible AMI/MIDI fuse holder and adhere to specified torque values to prevent excessive resistance, which can cause overheating. This fuse type should be placed as close as possible to the power source or battery to maximize protection of downstream wiring. It is a standard replacement part for many Blue Sea systems, ensuring easy compatibility and interchangeability.

It is important to remember that a fuse is a sacrificial component. Its role is to melt to protect the rest of the system. Selecting an 80-amp fuse must be based on the circuit’s maximum continuous load and cable diameter to ensure effective protection without nuisance tripping. For very high-power applications or large battery banks, ANL fuses with higher interrupting capacities should be considered.

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AMI / MIDI Fuse - 80 A

£6.52 GBP

£6.52 GBP ~~£7.25 GBP~~

Frequently Asked Questions

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What is an AMI/MIDI fuse and what is it used for?

An AMI (Ampere Interrupting) or MIDI (Medium Interrupting) fuse is a type of fuse designed to protect DC electrical circuits from overloads and short circuits. It provides rapid current interruption to prevent damage to sensitive equipment and wiring. This 80-amp fuse is specifically suited for marine installations requiring high protection in compact spaces.

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

AMI/MIDI fuses, such as this 80 amp model, are rated for higher currents and provide a greater interrupting capacity compared to ATO/ATC fuses. They are designed for high-power applications, such as main power lines, inverter circuits, or charging systems, whereas ATO/ATC fuses are typically used for lower-current circuits.

For which applications is this Blue Sea 80-amp fuse recommended?

This 80-amp fuse is ideal for protecting DC marine electrical circuits that require robust protection without the bulk of very high-current fuses (e.g., ANL types). It is commonly used for high-consumption secondary power lines, inverter circuits, charging systems, or as the main protection for medium-sized installations on boats.

What type of fuse holder is required for this AMI/MIDI fuse?

This 80 amp AMI/MIDI fuse must be used with a fuse holder specifically designed for AMI or MIDI type fuses. Using a compatible fuse holder is essential to ensure a secure connection, optimal performance, and simplified maintenance of the electrical system.

Is this fuse suitable for marine environments?

Yes, Blue Sea Systems fuses, including this 80-amp AMI/MIDI model, are designed for protecting DC marine electrical circuits. They are built to withstand the demanding conditions of marine environments, ensuring increased reliability and safety for onboard equipment.

How to correctly install an AMI/MIDI fuse?

Installing an AMI/MIDI fuse involves placing it in a compatible AMI/MIDI fuse holder. It is crucial to ensure the circuit is powered off before any manipulation. The fuse must be firmly inserted into the fuse holder to guarantee good electrical contact. It is recommended to consult the fuse holder manual and your installation's electrical diagrams for detailed instructions.

Can this fuse be used as the main protection for a circuit?

Yes, this 80-amp AMI/MIDI fuse is designed with a high interrupt rating, making it suitable for use as the main protection on high-power circuits. It is ideal for medium-sized main power lines or high-consumption secondary circuits, providing robust protection against overloads and short circuits.