Bloc fusibles compacts à lame ST - 4 circuits - ST Blade Compact Fuse Blocks - 4 Circuits

Bloc fusibles compacts à lame ST - 4 circuits - Wiring Diagram

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 11%

Blue Sea Systems

5045B-BSS

Compact blade fuse block - 4 circuits

The ST Blue Sea 5045B-BSS compact fuse block with blade terminals is a reliable solution for protecting 4 marine circuits. "Ignition Protected" and designed for ATO/ATC fuses, it optimizes space with its single-sided wiring, ideal for confined installations. Part of the ST-Blade range, this model is supplied with an insulating cover; fuses are sold separately.

Price excl. import taxesBenefit from the professional rate

$41.00 USD

$41.00 USD ~~$46.00 USD~~

Shipping calculated at checkout.

Prices exclude import taxes. DAP delivery: import taxes are paid on delivery.

Available 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	ATO/ATC
Nominal voltage	32
Amperage	30.0
Compatible fuse rating range	Up to 30 A per circuit
Number of fuses	4.0
Mounting type	Surface mount
Stud size (mm)	4.8 mm
Terminal thread size (mm)	4.2 mm
Cover included	Oui
Ignition protection	Oui
Flame retardant	Oui
ABYC compliance	Oui
Contact material	Tinned copper
Dimensions (W x H x D)	92.5 x 43.8 x 32.5
Weight	0.11
Certifications	CE,ISO 8846
Bus Material Plating	Tinned
Cable Entry Location	Single side
Circuit Configuration Type	Common source
Compatible Terminal Type	Eye splice, fork splice
Cover material	Insulating plastic
Main Terminal Stud Size Imperial	#10-32
Max Total Amperage	100
Mounting Screw Size Imperial	#8
Product type	Fuse block
Terminal Screw Size Imperial	#8-32
Terminal Screw Type	Screw with captive lock washer

Detailed description

The Blue Sea 5045B-BSS compact blade fuse block with 4 circuits is designed for protecting marine electrical circuits. This device integrates four circuits for fast-acting ATO® and ATC® fuses, providing a surface-mount solution for systems requiring reliable and secure power distribution.

Design and Technical Specifications

With its compact design, this fuse block allows cable entry from one side only, optimizing available space on board. It is "Ignition Protected", making it safe for use in gasoline engine compartments, and complies with ABYC/USCG insulation requirements. The bus bars and fuse clips are made of tinned copper for improved conductivity and corrosion resistance. The block accepts ring or spade terminals and is equipped with #8-32 terminal screws with captive lock washers, as well as a #10-32 threaded stud for the main power feed. Its maximum operating voltage is 32V DC, with a maximum amperage of 30A per circuit and 100A per block. Mounting is done using #8 (M4) screws.

Positioning in the Blue Sea Range

The 5045B-BSS model, with its four circuits, is positioned as an option for smaller installations or for adding dedicated circuits compared to its larger sibling, the Blue Sea 5046, which offers eight circuits. While the 5046 is suited for more extensive distribution needs, the 5045 excels where space is limited and a smaller number of circuits is required. This ST-Blade series is a standard solution for circuit protection, recognized for its reliability in marine environments. Standard and custom labels are available separately for clear circuit identification. ATO or ATC fuses are sold separately.

Expert opinion

Pol CONIN

Digital Manager

« Compact protection solution for marine auxiliary circuits »

This compact ST-Blade 4-circuit fuse block from Blue Sea Systems is a practical solution for managing auxiliary circuits on recreational craft or tenders. Its small footprint and single-sided cable entry make it particularly suitable for tight spaces such as helm consoles, battery compartments, or technical lockers where space is critical. The key advantage of this model is its "Ignition Protected" certification, an essential requirement for any electrical installation near an engine, especially in fuel compartments, eliminating the need for additional specific enclosures.

Compared to the 5046 8-circuit model in the same series, the 5045 is the right choice when a limited number of protections is sufficient for a given system, such as a navigation instrument group, bilge pump system, or deck lighting. It provides a solid foundation for creating isolated distribution points, simplifying troubleshooting and installation modularity. It is important to note that fuses must be purchased separately and that the 100A capacity per block, while sufficient for 4 x 30A circuits, must be respected for the main power line. This product is not intended to replace a full vessel electrical panel but rather to supplement an existing architecture or equip secondary systems efficiently and safely.

Durabilité

Facilité d'installation

Rapport performance / prix

Payment and security

Your payment information and data are processed securely.

Compact blade fuse block - 4 circuits

$41.00 USD

$41.00 USD ~~$46.00 USD~~

Frequently Asked Questions

Need help? Contact us

What is a compact ST-blade 4-circuit fuse block by Blue Sea?

This is a marine electrical circuit protection device integrating four fast-acting ATO® and ATC® fuse blade circuits. It is designed for surface mounting and provides reliable and secure power distribution.

How many circuits can this fuse block protect?

This fuse block is designed to protect up to four separate electrical circuits.

Which types of fuses are compatible with this block?

This fuse block is compatible with ATO® and ATC® fast-acting blade fuses.

What is the maximum operating voltage of this fuse block?

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

What is the maximum amperage this block can handle?

This block can support a maximum amperage of 30A per circuit and a total of 100A for the entire block.

Can this fuse block be used in a gasoline engine compartment?

Yes, this fuse block is "Ignition Protected" (protected against ignition), making it safe for use in gasoline engine compartments. It meets the external ignition protection requirements of ISO 8846 and SAE J1171.

What are the materials of the busbars and fuse clips?

The busbars and fuse clips are made of tinned copper, ensuring better conductivity and excellent resistance to corrosion in a marine environment.

How is this fuse block installed?

Installation is surface-mounted using #8 (M4) screws. Mounting screw centers are spaced 65.1mm (2.56").

What are the dimensions of this compact fuse block?

The dimensions of this fuse block are 92.5mm (length) x 43.8mm (width) x 32.5mm (height).

Is the fuse block supplied with a cover?

Yes, this fuse block is supplied with an insulating cover that meets ABYC/USCG insulation requirements.

Which types of cable lugs are accepted by the terminals?

The terminals of this fuse block accept ring or fork terminals.

What type of screw is used for circuit connections?

The circuit connections use #8-32 terminal screws with a captive lock washer to ensure secure fastening.

What is the stud type for the main power supply?

The main power connection uses a #10-32 threaded stud.

Is this fuse block compliant with marine standards?

Yes, it complies with ABYC/USCG insulation requirements and meets external ignition protection requirements per ISO 8846 and SAE J1171. It is also certified EC Type Examination under Directive 2013/53/EU.

How is the wiring organized on this fuse block?

Its design allows cable entry from one side only, optimizing available space and simplifying wiring.

Are the fuses included with the block?

No, fuses are sold separately and are not included with the fuse block.

What is the height of the connection terminals?

The height of the connection terminals is 9.5mm (0.38").

What is the height of the main mast?

The main bus height is 8.6mm (0.34").

What is the difference between this model (5045) and model 5046?

Model 5045 (this product) offers 4 circuits, whereas model 5046 offers 8 circuits. The 5045 is more compact and suited to installations requiring fewer circuits or limited space.

Is this fuse block suitable for use in fresh water or salt water?

Thanks to its tinned copper busbars and fuse clips, it offers excellent corrosion resistance, making it suitable for use in marine environments, including saltwater.