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Blue Sea 300A Black Mini m-Series Dual Circuit+ Battery Switch
Blue Sea 300A Black Mini m-Series Dual Circuit+ Battery Switch
300A Continuous - Isolate Start & House - Emergency Combine Function
Regular price
$89.00
Availability:
In Stock
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DESCRIPTION
Blue Sea m-Series 300A Dual Circuit Plus: Simplified Battery Management
The Blue Sea m-Series Dual Circuit Plus Battery Switch offers a sophisticated solution for managing dual battery banks in marine, caravan, and 4WD applications. Unlike standard selector switches, this unit simplifies the switching process by simultaneously connecting two isolated battery banks to their respective loads with a single ON position. Ideally suited for 12V and 24V systems (up to 32V DC max), it ensures your start battery remains reserved for engine cranking while your house battery powers onboard electronics.
Isolate Start and House Circuits Automatically
One of the primary risks in a dual battery setup is accidentally draining the starting battery by leaving a traditional selector switch in the "Both" position. The Dual Circuit Plus design eliminates this common error. When switched to ON, it mechanically connects the start battery to the engine circuit and the house battery to the distribution panel, yet keeps them electrically isolated. This ensures that voltage drops or heavy loads on the house circuit do not affect the starting battery, providing peace of mind when anchored or camped for extended periods.
Emergency Parallel Functionality
In the event of a flat starting battery, the switch features a COMBINE position. This effectively parallels both battery banks, allowing you to utilise the house battery to assist in starting the engine. This emergency cross-over capability is essential for safety at sea or in remote locations, ensuring you have a backup power source readily available without needing to use jumper leads.
Compact, Durable, and Safe Design
Designed for the harsh marine environment, the m-Series switches feature tinned copper studs for maximum conductivity and corrosion resistance. The 3/8"-16 (Approx. M10) stud terminals are designed to accept heavy-duty ring terminals and lugs up to 4/0 AWG (approx. 120mm²). The compact footprint makes it ideal for crowded dashboards or tight electrical lockers where space is at a premium.
Furthermore, the make-before-break contact design ensures seamless switching between battery banks without interrupting power to sensitive electronics, such as GPS units, engine ECUs, or audio systems. The switch is also ignition protected, making it safe for installation on petrol-powered boats.
Key Features
- Dual Circuit Plus technology: Switches two isolated battery banks simultaneously
- Emergency Combine: Parallels batteries for emergency starting
- 300A Continuous Rating: Handles significant loads suitable for most marine and RV setups
- Ignition Protected: Safe for installation aboard petrol-powered vessels
- Flexible Mounting: Case design allows surface, front panel, or rear panel mounting
- High Conductivity: Tinned copper studs ensure optimal power transfer
Secure Your Power System
Upgrade your battery management with a switch that prioritises reliability and ease of use. Install the Blue Sea m-Series Dual Circuit Plus today for a professional, simplified power system that protects your starting capacity while keeping your accessories running.
SKU: BS-6011200B
SPECIFICATIONS
Specifications
| Switch Type | Dual Circuit Plus |
|---|---|
| Color | Black |
| Switch Positions | 3 |
| Battery Combine | Yes |
| Alternator Field Disconnect | No |
| Maximum Voltage | 32V DC |
| Stud Size |
3/8" (approx. 9.53 mm; reference only) |
| Terminal Stud Torque |
120 in-lb (13.56 N·m) (approx. 10.0 ft-lb; reference only) |
| Continuous Rating | 300A |
| Intermittent Rating | 450A (5 min) |
| Starting Rating (30 sec) | 675A per circuit |
| Battery Inputs | 2 |
| Cable Clearance For 4/0 AWG Cables |
1.12in (28.45 mm) (reference only) |
| Cable Size to Meet Ratings |
4/0 AWG (120mm²) (AWG vs mm² is an approximate equivalence; reference only) |
| Mounting Holes |
Accept #10 Screw (approx. #10 major diameter 4.83 mm; reference only) |
| Stud Material | Tinned Copper |
| Stud Torque |
120 in-lb (13.56 N·m) (approx. 10.0 ft-lb; reference only) |
| Switching Rating | 25A |
| Terminal Stud Size |
3/8" - 16 (M10) (3/8" ≈ 9.53 mm major diameter; M10 is 10 mm; 16 TPI ≈ 1.59 mm pitch; reference only) |
| Weight (min / max) |
0.80–0.80 lb (0.36–0.36 kg) (approx. 360 g; reference only) |
| SKU: | BS-6011200B |
| Model #: | BS-6011200B |
| MPN: | BS-6011200B |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, depending on the nature of the fault and the requirements of Australian Consumer Law.
Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase and a clear description of the fault.
Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.
Making a Warranty Claim
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms and continued availability.
Australian Consumer Law
This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
