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BEP Marine

777-BB5S-650-B

Busbar 5 studs 650 A

The BEP 5-connection 650A bus bar (ref. 777-BB5S-650) is a rugged power distribution solution for high-current marine systems. Part of BEP’s Pro Installer range, it delivers 650A capacity with five 10 mm studs and a reinforced plastic base for high chemical and thermal resistance. This model integrates seamlessly with other Pro Installer components, ensuring modular and reliable installation. The product includes the bus bar with its reinforced plastic base and polycarbonate cover.

Retail priceBenefit from the professional rate

£65.19 GBP

£65.19 GBP ~~£87.12 GBP~~

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Low stock

Free pickup point from €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

Nominal voltage	50 VDC
Amperage	650.0
Nombre de circuits	5.0
Nombre de pôles	Single-pole
Méthode de protection des circuits	None
Mounting type	Pan head
Display type	None
Wired network	None
Certifications	CE
Taille maximale de cosse de câble	10 mm
Dimensions (W x H x D)	147 x 49 x 64
Weight	0.506
Conformité ABYC	Oui
Type d'application du busbar	Marine
Matériau de la base de la barre omnibus	Fiberglass reinforced plastic
Matériau conducteur de la barre omnibus	Tinned copper
Type de barre omnibus	Heavy
Cable Attachment Angle Range Degrees	Between -90° and +90°
Résistance chimique	Yes
Color	Transparent
Couvercle de protection inclus	Oui
Matériau du couvercle	Polycarbonate
Transparence du capot	Transparent
Flame retardant	Oui
Footprint Factor	1.5
High Temperature Resistance	Yes
Type de conception de la barre de liaison	Modular
Longueur totale de la barre de liaison	147.0
Section de câble maximale par goujon	120.0
Modular Interconnection System	Busbars and fuse holders Pro Installer
Product range	Pro Installer
Product type	Busbar
Nombre de goujons	5.0
Taille des goujons	10
Stud Thread Metric	Metrics
Nombre de bornes	5.0
Taille du filetage des bornes	10
Weight Oz	17.9

Detailed description

The BEP 5-connection 650A bus bar (part number 777-BB5S-650) is an electrical distribution solution designed for demanding marine systems requiring reliable management of high currents. This component is rated for a nominal voltage of 50 VDC and supports continuous current of 650A, placing it in BEP’s "Heavy-duty" bus bar category.

Robust design and electrical performance

With its five 10 mm diameter metric-threaded studs, the 5-connection 650A MC5 Bus Bar ensures secure connections for large-gauge cables essential for 650A applications. Its base is made of fiber-reinforced plastic, resistant to high temperatures and chemicals, ensuring enhanced durability in marine environments. A transparent polycarbonate cover protects connections while allowing quick visual inspection. Its dimensions of 147 x 49 x 64 mm and weight of 506g optimize integration into compact electrical panels.

Integration and modularity in the Pro Installer system

The 5-connection 650A MC5 Bus Bar is part of BEP’s modular Pro Installer range, enabling easy interconnection with other bus bars and fuse holders in the same series. This compatibility provides installation flexibility and system scalability. Unlike BEP’s Z-Busbars (e.g., 777-Z10W-200 or 777-Z18W-200) which handle 200A with 6 mm studs for smaller cable terminations, the 777-BB5S-650 is optimized for primary power distribution. It complements other heavy-duty bus bars from the brand, such as the 777-BB3S-650 (3 studs) and 777-BB8S-650 (8 studs), offering a balance between the number of connections and footprint for installations requiring five high-current connection points.

Documentation

Type	Nom
	EN - Detailed technical datasheet - Bus Bar 5 connections 650A MC5 - 777-BB5S-650
	EN - Detailed technical sheet - Bus Bar 5 connections 650A MC5 - 777-BB5S-650
	EN - Installation Guide - Bus Bar 5 connections 650A MC5 - 777-BB5S-650
	EN - Installation Guide - 5-Port 650A MC5 Bus Bar - 777-BB5S-650
	EN - Detailed technical sheet for connection and sheathing accessories - Bus Bar 5 connections 650A MC5 - 777-BB5S-650
	EN - Product Range Overview - Bus Bar 5 Connections 650A MC5 - 777-BB5S-650

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the BEP 650A 5-stud bus bar »

The BEP 5-connection 650A bus bar (ref. 777-BB5S-650) is a critical component for any marine electrical installation requiring high-current power distribution. Its 650A nominal capacity at 50 VDC, combined with 10 mm studs, makes it suitable for main circuits on boats where safety and reliability are paramount. The rugged design, featuring a high-temperature and chemical-resistant reinforced plastic base and a polycarbonate cover, ensures excellent durability and effective protection of connections in harsh marine environments.

Integrating this bus bar into the BEP Pro Installer ecosystem is a significant advantage. This modularity not only simplifies initial installation but also provides flexibility for future system expansions or modifications. It centralizes power connections in an organized manner, reducing cable clutter and facilitating maintenance. Compared to lower-capacity distribution solutions, this 650A model is essential for systems powering energy-intensive equipment such as converters, high-output chargers, or large battery banks. Its technical design ensures optimal conductivity and efficient heat dissipation, critical factors for the longevity of the entire electrical system.

The 5-stud configuration allows for balanced current distribution, minimizing voltage drop and heat buildup in high-load scenarios. This bus bar meets marine-grade standards for vibration resistance and corrosion protection, making it a reliable choice for offshore and coastal installations.

Note: Installation must comply with IEC 60092-352 and NMEA 2000 standards for marine electrical systems. Always use appropriate torque values (specified in the BEP installation guide) to secure studs and prevent loosening due to vibration.

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Busbar 5 studs 650 A

£65.19 GBP

£65.19 GBP ~~£87.12 GBP~~

Frequently Asked Questions

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What is a bus bar and what is it used for?

A bus bar, or busbar, is an electrical conductor that distributes power from a single source to multiple loads or circuits. The BEP 5-connection 650A MC5 bus bar is designed for primary power distribution in marine systems, providing secure connections for high-current cables.

What is the maximum current capacity of this BEP bus bar?

This BEP bus bar is designed to support a continuous nominal current of 650 amperes (650A).

What is the nominal voltage of this bus bar?

The nominal voltage of this bus bar is 50 VDC (volts direct current).

How many connections does this bus bar offer?

This bus bar is equipped with 5 connection studs.

What material is the bus bar base made of?

The bus bar base is made of fiber-reinforced plastic, resistant to high temperatures and chemicals, ensuring enhanced durability in the marine environment.

What is the material of the protective cover?

The protective cover is made of transparent polycarbonate.

What is the size of the connection studs on this bus bar?

The connection studs have a diameter of 10 mm.

What type of thread is used for connection studs?

Connection studs use metric threading.

What is the country of manufacture of this bus bar?

This bus bar is manufactured in China.

How to ensure connected cables are the correct size?

It is crucial to ensure all cables are sized correctly for the loads they carry to guarantee system safety and performance. It is recommended to consult the manufacturer's guidelines for calculating appropriate cable sizes.

Is this bus bar part of a modular system?

Yes, the 5-connection 650A MC5 bus bar is part of the BEP Pro Installer modular range. This design allows easy interconnection with other components in the same series.

Which other BEP products is this bus bar compatible with for interconnection?

This bus bar is compatible with other bus bars and fuse holders in the BEP Pro Installer range, providing installation flexibility and system scalability.

What is the difference between this 650A bus bar and BEP's Z-Busbars?

The 5-connection 650A MC5 bus bar is optimized for primary power distribution with 10 mm studs and a 650A current rating. BEP's Z-Busbars (such as the 777-Z10W-200 or 777-Z18W-200 models) handle a maximum current of 200A with 6 mm studs, designed for smaller cable terminations and maximized power density for compact cables.

Is this bus bar suitable for demanding marine applications?

Yes, this bus bar is specifically designed for demanding marine systems requiring reliable high-current handling up to 650A and robust construction.

Are there other BEP bus bars with the same capacity but a different number of connections?

Yes, BEP offers other heavy-duty bus bars with the same 650A capacity but a different number of studs, such as the 777-BB3S-650 (3 studs) and the 777-BB8S-650 (8 studs).