Blue Sea Systems C-Series UL-489 Circuit Breaker, 1-Pole, 80V DC, Flat Rocker, 10,000A Interrupt Capacity

Overview

The Blue Sea Systems UL-489 Circuit Breaker is a single-pole DC circuit breaker range with a flat rocker actuator, built for marine electrical panels that need UL-489 style protection up to 80V DC. The range covers 5A, 10A, 15A, 20A, 30A, 50A, and 100A ratings, so it can be matched to the wire size and load requirements of the circuit being protected.

This breaker uses a magnetic hydraulic, trip-free mechanism with a 10,000A interrupt capacity. The trip-free action is important on board because the breaker cannot be held closed during a fault condition, helping protect branch circuits, control circuits, and other DC loads in demanding marine installations.

The flat rocker sits flush when in the ON position, which helps reduce accidental switching on crowded helm, cabin, or equipment panels. Operating temperature is rated from -40 C to 85 C, making this range suitable for electrical spaces exposed to wide seasonal and engine-room temperature changes.

Key features

• Single-pole DC breaker range for marine circuits up to 80V DC.
• Available amperage ratings from 5A to 100A for matching protection to the load and conductor size.
• Magnetic hydraulic, trip-free breaker action so the circuit cannot be forced closed during a fault.
• Flat rocker actuator sits flush in the ON position to help limit accidental switching on panels.
• 10,000A interrupt capacity for demanding DC protection layouts.
• #10-32 tin-plated brass screw terminals on 5A through 50A versions, with a 1/4-20 stud terminal on the 100A version.
• #6-32 stainless steel mounting screws support secure panel installation.
• Suitable for installations where UL-489 specifications are required, including vessels covered under CFR 46.

Variants

This product is offered in multiple amperage ratings across the same flat rocker, single-pole UL-489 circuit breaker family. The selectable ratings are 5A, 10A, 15A, 20A, 30A, 50A, and 100A.

The main difference across the range is current rating, with the 100A version also using a stud-style terminal rather than the screw terminal used on the lower amperage versions. The voltage rating, pole count, actuator style, breaker type, interrupt capacity, operating temperature range, and mounting screw specification remain consistent across the listed configurations.

Installation and fit

Use the breaker rating that matches the protected circuit and wire size, following the vessel wiring plan and applicable marine electrical standards. This is not a general-purpose switch replacement; it is circuit protection, so sizing should be based on the conductor and load rather than only the equipment nameplate.

The flat rocker format makes sense for panels where accidental contact is a concern, such as helm switch panels, navigation stations, cabin distribution panels, or service panels in tighter equipment spaces. Terminal torque and mounting torque should be followed during installation so the electrical connection and panel fit stay secure under vibration.

Electrical and system integration

This range is for DC systems up to 80V DC, which makes it useful across many boat electrical layouts, including 12V, 24V, 36V, and 48V DC installations when the circuit rating and wiring are appropriate. The breaker can be used in distribution and equipment protection layouts where a resettable breaker is preferred over replacing a fuse after a trip.

The 5A through 50A versions use #10-32 tin-plated brass screw terminals with a 15 to 20 in-lb terminal torque range. The 100A version uses a 1/4-20 stud terminal with a 30 to 35 in-lb terminal torque range, giving the higher-current model a connection style suited to heavier conductors and lugs.

Use cases on board

This breaker range is a good match for boat builders, refit yards, and owners upgrading DC distribution panels where UL-489 circuit protection is part of the specification. It is also useful for commercial, patrol, military, and inspected vessel projects where documentation and circuit protection standards matter as much as basic fit.

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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