HD-Series Heavy Duty Selector Battery Switch with AFD - HD-Series Heavy Duty Selector Battery Switch with AFD

HD-Series Heavy Duty Selector Battery Switch with AFD - Mounting Diagram

Free pickup point shipping over €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 12%

Blue Sea Systems

3003-BSS

Battery isolator HD-Series heavy-duty selector switch with AFD

Designed for large diesel engines, the BLUE SEA HD-Series 3003-BSS battery selector switch provides robust electrical management with a continuous capacity of 500A. It includes an alternator field disconnect (AFD) and Make-Before-Break functionality for increased safety and uninterrupted power. This HD-Series range is Blue Sea’s most powerful, exceeding the m-Series and e-Series in current handling and offering a 4-position selector switch for maximum flexibility.

Retail priceBenefit from the professional rate

135,67€

135,67€ ~~154,44€~~

Tax included. Shipping calculated at checkout.

In stock

Free pickup point shipping over €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

Product use	Management and selection of battery banks for large diesel engines, emergency starting
Switch type	4-position selector
Courant continu (A)	500
Courant intermittent (A)	700
Courant de démarrage (A)	1600
Maximale tension dc	32
Nombre de pôles	1
Positions	4
Protection AFD	Oui
Type de borne	Dowel
Terminal size	M12 (1/2")
Type de connexion câblage	Eye terminals
Type de contrôle	Rotary knob
Mounting type	Surface or flush mounting
IP rating	IP66
Operating voltage range	0-32 V DC
Diamètre de découpe du panneau	85.7
Housing material	Plastic
Dimensions (W x H x D)	98 x 98 x 92.2
Conformité ABYC	Compliant with ABYC requirements for battery switches
Couleur de l'actionneur	Red
Style d'actionneur	Rotary button
Amperage	500
Battery Inputs Count	2
Cable Size To Meet Ratings Awg	4/0
Cable Size To Meet Ratings Mm2	120
Certifications	UL Listed - UL 1107, SAE J1171, ISO 8846, ABYC, CE
Ignition protection standard	UL 1500, SAE J1171, ISO 8846
Installation type	Surface or flush mounting
Voyant lumineux	false
Max Terminal Stud Torque	24.86 (220 in-lb)
Nominal voltage	12/24
Product range	HD-Series
Type de produit	Battery selector
Fonction de l'interrupteur	Selection of battery banks and battery combinations
Terminal Stud Length Mm	22.22
Terminal Stud Material	Tinned copper

Detailed description

Designed for demanding marine electrical systems, the HD-Series Heavy Duty Selector Battery Switch with AFD from Blue Sea Systems, part number 3003-BSS, provides robust and secure battery bank management. This model is specifically designed to operate on large diesel engines requiring high power output and low heat generation.

Electrical performance and durability

The 3003-BSS offers high electrical specifications: a starting capacity of 1,600 amperes (30 sec), an intermittent capacity of 700 amperes (5 min), and a continuous capacity of 500 amperes. It is designed for a maximum operating voltage of 32V DC. These values clearly position it above Blue Sea Systems' m-Series (300A continuous) and e-Series (350A continuous) ranges, which are intended for outboard motors and medium-sized gasoline or diesel inboard engines. The tinned copper terminals of type M12-1.75 (1/2") ensure maximum conductivity and corrosion resistance. Their length of 22.22 mm (7/8") allows multiple cable terminals to be accommodated, with a recommended tightening torque of 24.86 N·m (220 in-lb). The selector is compatible with battery cables up to 4/0 AWG (120 mm²).

Safety and advanced features

The HD-Series 3003-BSS battery selector integrates the Alternator Field Disconnect (AFD) function, which protects the alternator diodes in case the switch is turned off while the engine is running. Its "Make-Before-Break" design is essential for maintaining continuous power supply to critical systems when switching between battery banks. The housing allows for surface or rear-panel mounting. This product fully complies with ABYC standards for battery switches, is UL 1107 listed for electrical power switches, and meets external ignition protection requirements per UL 1500 and SAE J1171, making it safe for installations on gasoline-powered boats. It also features IP66 protection, ensuring resistance to dust and intense water spray. Blue Sea Systems' one-piece terminal stud design ensures a stable and durable connection, eliminating the risk of loosening over time. A tactile indicator allows the knob position to be identified by touch, useful in low-light conditions. This 4-position selector allows selection between battery 1, battery 2, or combining both (1+2) for charging or emergency starting, offering superior flexibility compared to 3-position or ON-OFF models.

Documentation

Type	Nom
	EN - Instructions - HD-Series Heavy Duty Selector Battery Switch with AFD
	EN - M Series, E Series, And HD Series Battery Switch Operation Diagrams - HD-Series Heavy Duty Selector Battery Switch with AFD
	EN - Manual - HD-Series Heavy Duty Selector Battery Switch with AFD
	EN - Certificate - HD-Series Heavy Duty Selector Battery Switch with AFD
	EN - Certificate - HD-Series Heavy Duty Selector Battery Switch with AFD

Expert opinion

Pol CONIN

Digital Manager

« HD-Series 500A Battery Selector: Robust and Secure Power Management »

The Blue Sea Systems HD-Series 3003-BSS battery selector is a key component for complex marine electrical installations, particularly on large sailboats and motor yachts equipped with diesel engines. Its continuous rated capacity of 500 amperes positions it as a robust solution capable of handling high loads without compromising system integrity.

The Alternator Field Disconnect (AFD) feature is a major asset, protecting the alternator from destructive overvoltages in case of accidental manipulation of the running engine switch. This often-overlooked characteristic can prevent costly repairs on high-power alternators. The "Make-Before-Break" design ensures uninterrupted electrical transition, essential for sensitive navigation or communication equipment that tolerates no downtime.

For installation, it is imperative to respect cable sizing (4/0 AWG / 120 mm²) and the 24.86 N·m torque on M12 terminals. Easy access and proximity to batteries are recommended to optimize performance and safety. This model is particularly relevant for vessels with two isolated battery banks (start and service) requiring the ability to combine them in emergencies or for charging. Its compliance with ABYC, UL, and ISO 8846 standards attests to a level of reliability and safety suited to the most demanding marine environments. It is a strategic choice for reliable and durable power management where m-Series or e-Series models may be underpowered or less functional for demanding systems.

Durabilité

Facilité d'installation

Rapport performance / prix

Payment and security

Your payment information and data are processed securely.

Battery isolator HD-Series heavy-duty selector switch with AFD

135,67€

135,67€ ~~154,44€~~

Frequently Asked Questions

Need help? Contact us

What is the DC current capacity of this battery selector?

This battery selector has a DC current capacity of 500 amperes.

What is the intermittent current rating of the switch?

The intermittent current rating of this switch is 700 amperes for 5 minutes.

What is the cranking rating of this selector?

The cranking rating of this selector is 1 600 amperes for 30 seconds.

What is the maximum operating voltage of this battery selector?

The maximum operating voltage of this battery selector is 32V DC.

What is the purpose of the "Alternator Field Disconnect" (AFD) function?

The "Alternator Field Disconnect" (AFD) function is designed to protect the alternator's diodes in case the switch is turned off while the engine is running.

What is the "Make-Before-Break" design of this switch?

The "Make-Before-Break" (make before break) design is an essential feature that maintains continuous power supply during switch position changes, preventing power interruptions and protecting equipment.

Which types of engines is this HD-Series battery selector designed for?

This selector is specifically designed for large diesel engines requiring high power output and low heat generation.

What battery bank selection positions are available on this battery switch?

This switch allows you to select battery bank 1, 2, or 1+2 for charging or emergency starting.

What material are the battery selector switch terminals made of?

The terminals are made of tin-plated copper, M12-1.75 type (1/2"), for maximum conductivity and corrosion resistance.

What are the main dimensions of this battery selector?

The main dimensions of the battery selector are:

Width: 98 mm (3.85")Height: 98 mm (3.85")Mounting center-to-center distance: 76 mm (3.00")Terminal stud length: 22 mm (7/8")

Where should I install this battery selector?

It must be installed in an easily accessible location close to the batteries.

What is the recommended tightening torque for terminal studs?

The recommended tightening torque for terminal studs is 24.86 N·m (220 in-lb).

Which battery cable types are compatible with this selector?

This selector is compatible with battery cables up to 4/0 AWG (120 mm²).

What safety precautions should I take before installing the selector?

Before installation, it is imperative to disconnect the battery’s positive terminal. It is also recommended to consult a marine electrical professional for correct wiring.

How should cables be connected to the switch terminals?

To meet nominal ratings, a 4/0 AWG (120 mm²) cable must be connected to each battery terminal and two 4/0 AWG (120 mm²) cables to the common terminal.

Can I turn off the battery selector switch while the engine is running?

No, it is strongly recommended not to set the switch to OFF while the engine is running to avoid damaging the alternator.

What are the safety and compliance certifications for this battery selector?

This selector meets the requirements of the American Boat and Yacht Council (ABYC), is UL listed (UL 1107), and complies with UL 1500 and SAE J1171 external ignition protection standards. It is also certified to ISO 8846 and complies with Directive 94/25/EC.

Is the battery selector switch ignition-protected?

Yes, this selector switch is ignition-protected and marked accordingly, in compliance with UL 1500 and SAE J1171 standards.

Is this product designed for marine environment use?

Yes, this product is specifically designed for marine electrical applications and meets the American Boat and Yacht Council (ABYC) requirements for battery switches.