Blue Sea Systems ST Blade Split Bus Fuse Block, 12 Circuits, With Ground, ATO/ATC, 32V DC, 30A per Circuit, 100A Total

Overview

The Blue Sea Systems 5032 is a 12-circuit ST-Blade split bus fuse block with two isolated groups of six ATO/ATC circuits for boats that need both switched and 24-hour feeds in one place. It is rated for up to 32V DC, with a 30A limit per circuit and 100A total capacity, so it fits many 12V and 24V DC branch-circuit layouts when the load plan stays within those ratings.

This block includes a negative bus, which helps keep positive and negative terminations together instead of spreading them across multiple connection points. The clear insulating cover keeps the fuse area enclosed, gives you space to label circuits, and stores two spare fuses for quick service.

It works well when a boat has grown beyond a few in-line fuses and needs a cleaner distribution point for lights, pumps, electronics, and accessories. The split bus layout is especially useful when one group of circuits stays live while the other group is fed through a switch panel or ignition-controlled supply.

Key features

• Two isolated groups of six ATO/ATC fuse positions for separate feeds or a mix of switched and always-live circuits
• 12 fused circuits total, rated up to 30A per circuit and 100A total at 32V DC maximum
• Screw terminals accept ring terminals and use #8-32 screws with captive star lock washers
• Positive and negative bus studs are #10-32, with mounting sized for #8 screws or M4 hardware
• Clear insulating cover has label recesses, stores two spare fuses, and satisfies ABYC/USCG insulation requirements
• Tin-plated copper buses and fuse clips, plus one-piece stainless flange nuts at the connections
• Push-button cover latch makes fuse checks and circuit labeling easier after installation
• Fuses are sold separately, so each circuit can be matched to the wire and load it protects

Compatibility and fit

This fuse block makes sense on boats that need a tidy branch-circuit point near the helm, inside a cabin electrical panel, or in an equipment locker. It is a practical match for center consoles, cruisers, sailboats, and workboats where some loads need constant power and others are switched during normal operation.

Fit usually comes down to four things: the number of circuits you need, whether your system is 12V or 24V DC, the current on each branch, and the total current feeding the block. It accepts standard ATO/ATC blade fuses, so fuse selection stays straightforward when you are matching protection to each connected circuit.

Installation and setup

The split positive bus lets you bring in two separate feeds, or use one source and keep two circuit groups isolated for control and organization. The negative bus keeps return conductors together at the block, which can make new installations cleaner and later troubleshooting less time-consuming.

Ring-terminal connections are well suited to boats that see vibration, and the covered fuse area helps keep the finished install neat and easy to read. Before mounting, confirm wire size, fuse size, expected circuit load, total amperage on the block, and the available mounting space for a protected indoor location.

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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