Blue Sea Systems m-Series Selector 3 Position Battery Switch, 32V DC, 300A, IP66

Overview

The Blue Sea Systems m-Series Selector 3 Position Battery Switch is a manual battery selector for boats with two battery inputs and one shared load group. It is rated for 32V DC systems, with 300A continuous current, 500A for 5 minutes, and 900A starting current for 30 seconds, making it suitable for outboards and small gasoline or diesel engines.

This is a three-position selector switch, not a battery-combine model. It lets the operator feed onboard loads from one isolated battery bank or the other, while the OFF position allows the battery circuit to be shut down when the boat is stored, serviced, or left at the dock.

The m-Series format fits well in compact electrical layouts, battery compartments, and service panels where space, cable routing, and access all matter. Its IP66 rating, ignition protection, and tinned copper studs suit the wet, vibrating, and corrosive conditions found on marine electrical systems.

Key features

• Selector 3-position battery switch for managing two isolated battery inputs feeding a common onboard load group.
• 32V DC maximum voltage rating for common 12V and 24V marine electrical systems.
• 300A continuous rating, 500A intermittent rating for 5 minutes, and 900A starting rating for 30 seconds.
• Ignition protected for use aboard gasoline-powered boats where ignition protection is required.
• IP66 rating for resistance to spray and washdown exposure when installed in a suitable location.
• Tinned copper 3/8 in-16 (M10) terminal studs accept 3/8 in ring terminals and support 4/0 AWG cable sizing for the rated current.
• Case supports surface or rear panel mounting, with #10 mounting screw holes and 1.12 in cable clearance for 4/0 AWG cable.
• Meets ABYC requirements for battery switches, is UL Listed to UL 1107, and meets UL 1500 and SAE J1171 ignition protection requirements.

Variants

This m-Series selector switch is offered in two color configurations for different battery compartment, panel, or helm-area layouts.

Both variants share the same selector function, current ratings, terminal stud size, ignition protection, IP66 rating, and 32V DC maximum voltage. The visible switch color is the key difference between the two options.

• 6008: Red. The red case is easy to identify in a battery compartment or electrical panel, which can help during shutdown checks and service work.
• 6008200: Black. The black case gives a more subdued look on dark panels or helm-area electrical layouts while keeping the same m-Series selector function.

Installation and fit

Installation should be done with battery power isolated, and the positive battery terminal should be disconnected before mounting and wiring the switch. The terminal studs are intended for cable terminals mounted under the nut, with a specified torque of 120 in-lb (13.56 Nm).

To meet the published current ratings, use 4/0 AWG cable where required by the installation. Cable size, run length, circuit protection, and routing should match the boat electrical plan and the latest applicable marine electrical standards.

Electrical integration

This switch is useful where the boat has two battery banks and the operator needs manual control over which bank feeds the loads. It does not include alternator field disconnect and it is not a combine switch, so it should be wired as a selector for isolated banks rather than as a paralleling device.

The switch should not be turned to OFF while the engine is running. In real use, that makes it better suited for deliberate battery selection before starting, after shutdown, during service, or when securing the vessel at the dock.

Use cases on board

This product is a good match for small powerboats, fishing boats, center consoles, and auxiliary battery systems where a simple manual selector is preferred over automatic battery management. It gives the operator direct control of the battery source without adding networked controls or electronic switching modules.

Its combination of high current ratings, ignition protection, and marine-rated construction makes it practical for battery compartments, engine-adjacent service areas, and other locations where salt air, vibration, and occasional washdown exposure are part of normal boat life.

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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