Bloc de fusibles de bus divisé à lame ST - ST Blade Split Bus Fuse Block

Bloc de fusibles de bus divisé à lame ST - Dimensioned Drawing

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

Save 36%

Blue Sea Systems

5032B-BSS

ST Blade split-bus fuse block

The Blue Sea ST Blade 5032B-BSS fuse block is designed for efficient management of 12 marine electrical circuits, featuring a split bus for six 24-hour circuits and six switched circuits, with a maximum voltage of 32V DC and a total current of 100A. This solution optimizes wiring organization and meets ABYC/USCG requirements. It comes with a transparent insulating cover and stainless steel stud terminals, but fuses and labels are sold separately.

Retail priceBenefit from the professional rate

$72.88 USD

$72.88 USD ~~$114.66 USD~~

Shipping calculated at checkout.

Low 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	ATO/ATC
Nominal voltage	12/24
Amperage	30.0
Plage de calibre de fusible compatible	1-30 A
Pouvoir de coupure en court-circuit	1.0
Nombre de fusibles	12.0
Mounting type	Screw-in
Taille des goujons	4.8
Taille du filetage des bornes	4.2
Couvercle de protection inclus	Oui
Conformité ABYC	Oui
Contact material	Tinned copper
Housing material	Plastic
Couple de serrage recommandé des bornes	2.71
Section de câble maximale par goujon	25.0
Dimensions (W x H x D)	186.6 x 63.5 x 84.2
Weight	0.34
Certifications	ABYC/USCG
Bus Material	Tinned copper
Max Amperage Per Load Group	80
Max Operating Voltage Dc	32
Max Total Amperage	100
Product type	Fuse block
Recommended Wire Size Branch Circuit Awg	10-16
Recommended Wire Size Positive Feed Awg	4-6
Recommended Wire Size Positive Feed Mm2	16-25

Detailed description

Designed for complex marine electrical installations, the Blue Sea 5032B-BSS ST Blade split-bus fuse block provides differentiated circuit management. It allows combining on a single block six continuously powered circuits (24 hours) and six switched circuits, optimizing onboard wiring organization. This system eliminates the need for two separate blocks for permanent and controlled power requirements, simplifying the integration of essential equipment such as bilge pumps and navigation systems.

Capacities and technical specifications

The 5032B-BSS is rated for a maximum voltage of 32V DC, with a 30A capacity per individual circuit and a total current of 100A (not exceeding 80A per load group). It uses ATO® or ATC® type fuses, widely available. Connections are made via #8-32 screw terminals with captive lock washers for branch circuits, accepting 10 to 16 AWG (6-15 mm²) wires. The main power connects via #10-32 studs, suitable for 4 to 6 AWG (25-16 mm²) wires, secured with stainless steel flange nuts. Recommended torque is 2.71 N·m (24 in-lb) for #10 studs and 2.03 N·m (18 in-lb) for #8 screws.

Design and integration

This fuse block features tinned copper bus bars and fuse clips, ensuring conductivity and corrosion resistance suitable for marine environments. The transparent insulating cover meets ABYC/USCG isolation requirements and includes label holders and storage space for two spare fuses. Compared to other Blue Sea products, such as the 5035 block (6 independent circuits) or the 5025 (6 positive circuits), the 5032B-BSS stands out with its split-bus configuration with integrated ground, offering enhanced flexibility for installations requiring a mix of permanent and switched circuits in a single location. Fuses and labels are sold separately.

Expert opinion

Pol CONIN

Digital Manager

« Flexibility and safety for mixed electrical architectures »

The Blue Sea ST Blade 5032B-BSS fuse block is a relevant solution for naval architects and installers facing the increasing complexity of onboard electrical systems. Its split-bus functionality, allowing the coexistence of 24-hour circuits and switched circuits within a single compact unit, significantly simplifies wiring and maintenance. This configuration is particularly advantageous for cruising sailboats and small motor yachts where space is often limited and clear separation between safety equipment (smoke detectors, bilge alarms) and comfort equipment (radio, cabin lighting) is critical.

Integrating a ground connection on the negative bus enhances safety and compliance with ABYC standards, a key point for long-term reliability. During installation, it is critical to respect the recommended wire sizes (4-6 AWG for the main power feed, 10-16 AWG for branch circuits) and specified torque values to ensure connection integrity. The space for labels and spare fuses under the cover is a practical detail that facilitates quick troubleshooting at sea. While capable of handling a total of 100A, it is important not to exceed 80A per load group to maintain the system’s nominal performance. This model is ideal for streamlining secondary electrical panels or extending existing installations without overloading the main panel.

Durabilité

Facilité d'installation

Rapport performance / prix

Payment and security

Your payment information and data are processed securely.

ST Blade split-bus fuse block

$72.88 USD

$72.88 USD ~~$114.66 USD~~

Frequently Asked Questions

Need help? Contact us

What is a Blue Sea ST Blade split-bus fuse block?

A Blue Sea ST Blade split-bus fuse block is designed to handle both continuously powered circuits (24 hours) and switched circuits on a single block. This allows for optimized wiring organization on board, avoiding the use of two separate blocks for these two types of power supply.

How many circuits does this fuse block support?

This fuse block supports a total of 12 circuits. It is divided into two isolated groups of six circuits each, allowing separation of 24-hour circuits from switched circuits.

Which types of fuses are compatible with this block?

This fuse block is compatible with ATO® or ATC® type fuses, which are commonly available fuse types.

What is the maximum current per individual circuit?

Each individual circuit in this fuse block can handle a maximum current of 30 amperes (30A).

What is the maximum total current that the block can support?

The fuse block can support a maximum total current of 100 amperes (100A). It is important to note that the current must not exceed 80A per load group (the two groups of six circuits).

What is the maximum operating voltage of this fuse block?

The maximum operating voltage for this fuse block is 32V DC.

What materials are the fuse blocks and clips made of?

The fuse blocks and clips are made of tinned copper. This material ensures excellent electrical conductivity and superior resistance to corrosion, which is particularly important in a marine environment.

Is the fuse block supplied with a protective cover?

Yes, the fuse block is supplied with a transparent insulating cover. This cover meets ABYC/USCG insulation requirements for enhanced safety.

Are the fuses included with the purchase of the block?

No, fuses are not included with the purchase of the fuse block and must be purchased separately.

Does the fuse block cover offer additional features?

Yes, the transparent cover is designed with label holders to easily identify each circuit, and it also includes a storage space for two spare fuses.

Does this fuse block include a negative bus for ground?

Yes, this fuse block is equipped with a negative bus featuring a #10-32 stud for ground connection.

What wire sizes are recommended for the main power feed to the unit?

For the main positive power feed, use 4 to 6 AWG (25-16 mm²) wires. Connections are made via #10-32 studs.

What wire sizes are recommended for branch circuits?

For individual branch circuits, use 10 to 16 AWG (6-15 mm²) wires. Connections are made via #8-32 screw terminals.

What is the recommended torque for the main feed studs?

The recommended torque for the #10 studs on the main feed is 2.71 N·m (24 in-lb).

What is the recommended torque for the screw terminals of the branch circuits?

The recommended torque for the #8 screws on the branch circuit terminals is 2.03 N·m (18 in-lb).

How is the fuse block mounted?

The fuse block is mounted using #8 (M4) screws.

Is this fuse block suitable for 12V and 24V marine electrical systems?

Yes, this fuse block is fully suitable for 12V and 24V marine electrical systems, as its maximum operating voltage is 32V DC.

Can this fuse block be used with two isolated batteries?

Yes, this fuse block is designed to be used either with two isolated batteries or with a single battery to power a mix of 24-hour and switched circuits.

What is the warranty policy for this Blue Sea Systems product?

Blue Sea Systems products are generally covered by the manufacturer's limited warranty. For specific details and warranty conditions of this fuse block, consult the official Blue Sea Systems website or the documentation supplied with the product.