Blue Sea Systems ATO/ATC-Style Low Profile Circuit Breaker, For ST-Blade Fuse Blocks, 32V DC, Thermal Trip, Manual Reset, 2pk

Overview

The Blue Sea Systems ATO/ATC-Style Low Profile is a manually resettable circuit breaker made to replace standard ATO and ATC blade-style fuses in compatible DC fuse blocks. It gives boat owners a cleaner way to handle branch circuit protection because a tripped circuit can be reset with the push button rather than replacing a fuse after each overload event.

This low-profile breaker is rated for up to 32V DC and uses a thermal trip with manual reset. It has an interrupt capacity of 2000A at 28V DC and operates from -30° C to 77° C, which makes it suitable for common marine DC panels, small electronics circuits, pumps, lighting runs, and accessory loads when the correct amperage is matched to the wire and circuit.

The breaker fits ATO and ATC blade fuse locations and works with Blue Sea Systems ST-Blade fuse blocks, including water-resistant ST-Blade fuse blocks when the cover is secured. It is a practical option for boats where fast serviceability matters, such as fishing consoles, helm panels, cabin accessory circuits, and small DC distribution panels.

Key features

• Drop-in replacement for ATO and ATC blade-style fuses in compatible fuse blocks.
• Manual push-button reset helps restore a protected circuit without carrying spare fuses for that amperage.
• Thermal trip, manual reset breaker type for DC branch circuit protection.
• Maximum voltage rating of 32V DC for common 12V and 24V boat electrical systems.
• Interrupt capacity of 2000A at 28V DC for protection against high fault current within its rating.
• Operating temperature range of -30° C to 77° C for engine-adjacent spaces, helm panels, and cabins exposed to seasonal temperature swings.
• Compatible with Water-Resistant ST-Blade Fuse Blocks when the cover is secured, and compatible with other ST-Blade Fuse Blocks without a cover.
• Available in 5A, 7.5A, 10A, 15A, 20A, 25A, and 30A ratings to match different protected circuits.

Variants

This product range varies by amperage rating, with options from 5A through 30A. The selected amperage should match the protected circuit, wire size, and equipment requirements rather than the accessory alone.

The low-profile ATO/ATC blade format, 32V DC maximum voltage rating, thermal trip with manual reset, 2000A interrupt capacity at 28V DC, and ST-Blade fuse block compatibility remain consistent across the range.

Installation and setup

Install this breaker in the same type of fuse position used for an ATO or ATC blade fuse. The push-button reset should remain accessible after installation, especially in helm and distribution panels where a circuit may need to be checked quickly underway or at the dock.

Before replacing a fuse with a resettable breaker, confirm the circuit amperage, conductor size, and connected load. A resettable breaker should not be used to increase the rating of an existing circuit, and any repeated trip should be treated as a wiring or load issue that needs inspection.

Compatibility and fit

This breaker is a good match for boat owners and technicians who already use ATO/ATC-style DC fuse positions and want reset capability without changing the fuse block layout. It fits Blue Sea Systems ST-Blade fuse blocks and is especially useful in locations where small DC circuits are grouped together, such as electronics panels, switch panels, and accessory distribution blocks.

What’s included

• Two ATO/ATC-style low profile circuit breakers in the selected amperage.

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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