Hella Marine Battery Master Switch, Removable Key, IPX4, M10 Terminals

Overview

The Hella Marine 100/150 Amp Battery Master Switch is a keyed ON/OFF disconnect switch used to isolate a battery bank or other high-current feed on board.

It installs in either the positive or negative main lead and connects via M10 screw terminals for heavy-gauge ring lugs. The housing is rated IPX4 for splash exposure, which fits sheltered mounting spots where the switch is not taking direct washdowns.

Continuous rating depends on the configuration (100A or 150A). Short-duration cranking capability is specified for high inrush loads (10 seconds), up to 5000A at 12V or 2500A at 24V on some versions, and up to 1000A at 12V or 500A at 24V on others.

Key features

• Keyed ON/OFF disconnect for a single battery circuit or high-current feed
• Key can be removed in the OFF position, with the circuit open, to prevent unintended energizing
• Suitable for switching either the positive or negative main lead
• M10 screw terminals for common marine battery-cable lugs
• IPX4 splash protection for protected on-board locations
• Available in 100A and 150A continuous ratings depending on configuration

Variants

This switch family is offered in multiple configurations. The part number identifies the continuous current rating and the voltage range listed for that version.

These versions share the same keyed ON/OFF style and M10 terminal connection, so the main differences are the electrical ratings shown below.

• 002843011: Amperage 100 Amps, Voltage 24V DC. Listed for 24V DC systems where a keyed main disconnect is required.
• 001559001: Amperage 100 Amps, Voltage 10-30V DC. The 10-30V DC range covers common 12V and 24V battery systems.
• 002843051: Amperage 150 Amps, Voltage 10-30V DC. Higher continuous current rating for circuits carrying heavier loads within a 12V or 24V system.

Installation and setup

Mount the switch where it can be reached quickly and where the rear terminals stay protected from loose gear, dripping water, and accidental contact. Leave room for cable bends and for removing the key.

Use ring lugs sized for M10 studs and support the cables so vibration is not carried by the terminals. After wiring, confirm that OFF fully isolates the intended circuit and that the key only comes out with the switch open.

Compatibility and fit

This is a single-circuit battery master switch, so it disconnects one circuit at a time. Boats with separate start and house banks commonly use one switch per bank, or one per major feed that needs isolation.

Match the continuous amp rating to the expected draw on that circuit, and plan the mounting location around the IPX4 splash rating, with added shielding if the area sees direct spray.

Use on board

Common installs include a main house-bank disconnect near the batteries, a starting circuit shutoff, or a dedicated feed for a windlass or other high-current accessory that you want isolated during storage or service.

This is a good fit for boats that want a simple keyed shutoff without multi-bank selection functions.

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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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