m-Series Mini Dual Circuit Plus™ Battery Switch - Black - m-Series Mini Dual Circuit Plus™ Battery Switch - Black

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Blue Sea Systems

6011200-BSS

Dual-circuit battery switch Plus™ mini m-Series - black

Designed for outboard and small inboard engines, the Blue Sea m-Series Mini Dual Circuit Plus™ battery switch (model 6011200-BSS) provides versatile management of two isolated battery banks with a combining function. It delivers continuous 300A DC capacity per circuit and external ignition protection (ignition protected).

This ultra-compact model is optimized for installations with limited space and features a "Make-Before-Break" design to protect sensitive electronics. The product includes the battery switch only; no additional accessories are listed.

Color: Black

Red Black

Retail priceBenefit from the professional rate

£45.76 GBP

£45.76 GBP ~~£54.28 GBP~~

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In 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

Product use	Management of two isolated battery banks
Switch type	Dual Circuit Plus
Courant continu (A)	300
Courant intermittent (A)	450
Courant de démarrage (A)	675
Maximale tension dc	32
Nombre de pôles	Double
Positions	3
Type de borne	Tinned copper cotter pin
Terminal size	3/8"-16 (M10)
Type de connexion câblage	Ring bolt
Type de contrôle	Rotary knob
Mounting type	Surface mounting; Panel mounting
IP rating	IP66
Operating voltage range	Up to 32V DC
Diamètre de découpe du panneau	59
Dimensions (W x H x D)	72 x 72 x 63.57
Conformité ABYC	Meets all requirements
Couleur de l'actionneur	Black
Style d'actionneur	Rotary
Amperage	300
Cable Size To Meet Ratings Awg	4/0
Cable Size To Meet Ratings Mm2	120
Certifications	UL,ABYC,SAE
Guarantee Type	Satisfaction (refund or replacement at any time)
Ignition Protection Standards List	UL 1500, SAE J1171
Installation Standard	NFPA 302, ABYC E11
Installation type	Surface mounting; Panel mounting
Isolating Cover Features	Three snap-off side pieces for wire access
Voyant lumineux	No
Max Terminal Stud Torque	13.56
Nominal voltage	12/24
Nombre de prises	0
Type de produit	Battery isolator
Fonction de l'interrupteur	Switching and combining two battery banks
Terminal Stud Design Type	One-piece

Detailed description

The Blue Sea m-Series Mini Dual Circuit Plus™ Battery Switch (model 6011200-BSS) is designed for flexible and secure management of two isolated battery banks in marine, RV, or emergency vehicle applications. This switch allows simultaneous switching between two battery banks or combining them to power all loads, providing essential versatility for onboard electrical systems.

Advanced Battery Bank Management

With a continuous capacity of 300A DC per circuit and a starting current of 675A DC per circuit for 30 seconds, the 6011200-BSS model is suitable for outboards and small gasoline or diesel engines. It differs from the standard "Dual Circuit" version of the m-Series by its "Plus™" function, which includes the ability to combine battery banks when needed—a feature absent in basic Dual Circuit models. This functionality is particularly useful for emergency starts or maximizing energy availability.

Design and Technical Specifications

The switch is equipped with 3/8"-16 (M10) tinned copper terminals for maximum conductivity and corrosion resistance, accepting cables up to 4/0 AWG (120 mm²). Its "Make-Before-Break" design ensures switching without interrupting power, protecting sensitive electronic equipment from voltage spikes and outages. The Blue Sea m-Series Mini Dual Circuit Plus™ meets ABYC requirements for battery switches, is UL 1107 listed, and complies with UL 1500 and SAE J1171 standards for external ignition protection, making it safe for installations on gasoline-powered boats. Its compact housing (approximately 7.5 cm x 7.5 cm x 8.4 cm) and multiple mounting options (surface, front, or rear panel) facilitate integration into tight spaces, unlike Blue Sea’s larger HD-Series switches designed for diesel engines with higher DC current requirements up to 600A.

Documentation

Type	Nom
	EN - Instructions - m-Series Mini Dual Circuit Plus Battery Switch - Black
	EN - Dimensioned Drawing - m-Series Mini Dual Circuit Plus Battery Switch - Black
	EN - M Series, E Series, And HD Series Battery Switch Operation Diagrams - m-Series Mini Dual Circuit Plus Battery Switch - Black
	EN - Manual - m-Series Mini Dual Circuit Plus Battery Switch - Black

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis: Blue Sea m-Series Dual Circuit Plus battery switch »

The Blue Sea m-Series Mini Dual Circuit Plus™ battery switch is a critical component for owners of small powered boats (outboards, small inboard gasoline or diesel engines) or recreational vehicles that require clear and secure management of two battery banks. Its primary use case is isolating the starting battery from the house battery while providing a combine function for emergency situations or power boosts.

This model is particularly relevant when paired with an automatic charge relay (ACR). The ACR manages smart charging of both banks, while the switch provides manual intervention for full isolation or combining. Installation is simplified by the compact design and multiple mounting options (surface, front/back panel), allowing clean integration even in tight cockpits or engine compartments. The tinned copper terminals (3/8" / M10) are robust and accept large-gauge cables (up to 4/0 AWG), which is essential for minimizing voltage drops in high-current circuits.

Compared to classic "Selector" battery switches that may require an "OFF" position when switching banks, the m-Series Dual Circuit Plus™ "Make-Before-Break" design ensures continuous power, protecting sensitive electronics from unintended resets. This is a significant advantage for navigation or communication systems. However, for applications requiring continuous currents above 300A, such as large yachts with extensive battery banks or high-power bow thrusters, consider Blue Sea Systems E-Series (350A) or HD-Series (up to 600A) models, which are designed for heavier loads and larger cable diameters. The m-Series is therefore an excellent choice for its power category and versatility for small to mid-sized vessels.

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Dual-circuit battery switch Plus™ mini m-Series - black

£45.76 GBP

£45.76 GBP ~~£54.28 GBP~~

Frequently Asked Questions

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What are the main functions of the Blue Sea m-Series Mini Dual Circuit Plus™ battery switch?

The Blue Sea m-Series Mini Dual Circuit Plus™ battery switch is designed to manage two isolated battery banks simultaneously or combine them to power all loads. It provides essential versatility for onboard electrical systems.

What is the DC current capacity of this switch?

This switch has a DC current capacity of 300 amperes per circuit.

What is the cranking rating of this switch?

The cranking rating of this switch is 675 amperes DC per circuit for 30 seconds.

What is the maximum voltage this switch can handle?

The maximum operating voltage of this switch is 32 Volts DC.

What types of terminals are used on this switch and what are their advantages?

The switch is equipped with 3/8"-16 (M10) tin-plated copper terminals. They provide maximum conductivity and excellent corrosion resistance. Their one-piece design ensures they do not loosen over time.

Is this switch ignition-protected?

Yes, this switch is marked "Ignition Protected". It meets external ignition protection requirements UL 1500 and SAE J1171.

What cable size is recommended for this switch to meet its current specifications?

To meet the current specifications, the recommended cable size is 4/0 AWG (120 mm²).

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

The "Make-Before-Break" design of this switch ensures switching without interruption of power supply. This protects sensitive electronic equipment from voltage spikes and power interruptions when changing battery source.

What is the ingress protection rating (IP rating) of this switch?

This switch has an IP66 ingress protection rating, meaning it is dust-tight and protected against powerful water jets.

What safety precautions should I take before installing the switch?

Before installing the switch, it is essential to disconnect the battery's positive terminal to prevent any electrical risk. It is also recommended to consult a marine electrician for proper wiring.

What is the recommended torque for the switch terminals?

The recommended torque for the switch terminals is 120 in-lb (13.56 N·m). Battery cable lugs must be secured under the lock washer and nut.

Can this switch be mounted in different ways?

Yes, this switch offers multiple mounting options, including surface mounting, front panel mounting, and rear panel mounting.

Are there specific wiring recommendations?

Yes, it is recommended to connect a 4/0 AWG (120 mm²) cable per terminal to comply with current specifications. It is also advisable to refer to the latest edition of NFPA 302 and/or ABYC E11 standards for installation information.

What needs to be done before switching the battery switch to OFF?

Before switching the battery switch to OFF, it is important to turn off all connected electrical devices to prevent damage to the equipment.

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

No, you must never set the switch to OFF while the engine is running. This could damage the alternator or other components of the electrical system.

Which engine types is this switch compatible with?

This switch is designed for outboard engines and small gasoline or diesel engines, with a continuous rating of 300A.

Is this switch compliant with marine standards?

Yes, this switch meets all American Boat and Yacht Council (ABYC) requirements for battery switches and is UL 1107 listed for electrical power switches.

Can this switch be used with an automatic charging relay (ACR)?

Yes, the Dual Circuit Plus™ is specifically designed to work with an automatic charging relay (ACR) to allow simultaneous charging of two battery banks from the engine alternator.

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

Blue Sea Systems offers a satisfaction guarantee. Any Blue Sea Systems product a customer is not satisfied with can be returned for a refund or replacement at any time.