Blue Sea Systems m-Series Mini Dual Circuit Plus Battery Switch, 32V DC, 300A, 3 Position

Overview

The Blue Sea Systems m-Series Mini Dual Circuit Plus is a 3-position marine battery switch for two isolated battery banks, with a combine function that can connect both banks to all loads when needed. It is rated for 32V DC systems, 300A continuous current, 450A for 5 minutes, and 675A starting current for 30 seconds per circuit.

This switch is a practical fit for boats with separate start and house battery banks where a single rotary control is preferred over multiple switches. In normal use, it switches both battery banks at the same time while keeping them isolated. When the combine position is selected, both banks are connected so available battery capacity can support starting or onboard loads.

The m-Series Mini format keeps the switch compact while still using 3/8 inch 16 terminal studs and tinned copper stud material. It carries IP66 and ignition-protected ratings, which makes it suitable for exposed marine electrical areas and for installation on gasoline-powered boats when installed correctly.

Key features

• Dual Circuit Plus switching handles two isolated battery banks and includes a battery combine position for shared load support.
• Make-before-break contact action helps maintain power while moving between battery switch positions.
• 32V DC maximum voltage rating supports common 12V and 24V marine DC battery systems.
• 300A continuous rating, 450A intermittent rating for 5 minutes, and 675A starting rating for 30 seconds per circuit suit many small to mid-size boat battery installations.
• 3/8 inch 16 terminal studs accept M10 ring terminals, with cable clearance for 4/0 AWG cable.
• Tinned copper studs help maintain conductivity in a marine electrical environment.
• Mounting holes accept #10 screws for secure installation on a battery switch panel or electrical board.
• IP66, ignition protected, ISO 8846, SAE J1171, UL 1107, UL 1500, and CE ratings support use in demanding marine installations.

Variants

This product is offered in two color configurations with the same m-Series Mini Dual Circuit Plus switch function.

The color is the visible difference between the variants. The switching type, 3-position layout, battery combine function, 32V DC rating, terminal stud size, cable clearance, and listed current ratings are consistent across the red and black versions.

• 6011, color red. The red face is easy to associate with a main battery disconnect or emergency battery control location on many marine DC panels.
• 6011200, color black. The black face gives the switch a lower-profile look for darker helm panels, equipment boards, or battery compartments where a less prominent control is preferred.

Installation and setup

Install this switch where the operator can reach it quickly and where the rear terminals are protected from accidental contact. The terminal studs require 120 in-lb of torque, and cable sizing should match the current rating and the length of the run. For installations using the full switch rating, 4/0 AWG cable is specified.

This switch does not include alternator field disconnect, so the charging system layout should be checked before replacing a different switch type. It also should not be used to switch positive and negative conductors together because the combine function is part of the Dual Circuit Plus design.

Compatibility and fit

The switch is suited to marine battery systems with two battery inputs, such as a start bank and a house bank. It is commonly used on cruising boats, fishing boats, and small workboats where separate battery banks need simple manual control with a clear combine option.

Before installation, confirm the vessel voltage, maximum current demand, cable gauge, ring terminal size, available panel space, and access behind the mounting location. A proper installation helps reduce voltage drop, heat at the terminals, and service issues caused by loose or undersized battery cables.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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