Blue Sea Systems ST Blade Battery Terminal Mount Fuse Block, ATO/ATC, 4-Circuit, 32V DC

Overview

The Blue Sea Systems 5023 is an ST Blade battery terminal mount fuse block that adds four ATO/ATC fused circuits right at the battery. It mounts on a 3/8 in [M10] battery stud, works on DC systems up to 32V, and is rated for 100A total with up to 30A on each circuit.

This is a practical way to clean up accessory wiring near the battery and replace a cluster of separate in-line fuse holders with one protected distribution point. On board, that makes it easier to add and service a few dedicated feeds for electronics, pumps, stereo equipment, or lighting without taking up much space.

Key features

• Four independent ATO/ATC fuse positions for accessory branch circuits from one battery-side feed
• Direct battery terminal mounting with clearance for a 3/8 in [M10] stud
• 100A maximum per block and 30A maximum per circuit on systems up to 32V DC
• #8-32 screw terminals with captive star lock washers; screw terminal torque is 18 in-lb (2.03 Nm)
• Insulating cover helps reduce accidental contact and the block accepts small format circuit labels for circuit identification
• Ignition protected with the cover secured to SAE J1171 and ISO 8846

Compatibility and fit

Check the battery terminal layout before ordering. The block measures about 3.59 in long, 1.73 in wide, and 1.28 in high, so it fits best where there is enough clearance around the battery post and cable connections. It suits 12V and 24V systems and is better matched to accessory circuits than to single high-draw loads that need more than 30A on one branch.

Installation and use

Because it mounts directly at the battery, this fuse block works well when you want a short, tidy takeoff point for a few added circuits. Each outgoing circuit lands on its own screw terminal, and the label area helps later when you are tracing a chartplotter, bilge pump, stereo, or cabin light feed. It is a good match for smaller boats, refits, and auxiliary battery installations where four protected circuits are enough.

What's included

• ST Blade battery terminal mount fuse block
• Insulating cover
• One 15A ATO/ATC fuse
• Four nylon insulated ring terminals

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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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