Blue Sea 50A A-Series Single-Pole Flat Rocker Circuit Breaker
Blue Sea 50A A-Series Single-Pole Flat Rocker Circuit Breaker
Magnetic-Hydraulic Overcurrent Protection & Trip-Free Safety Design

DESCRIPTION
Integrated 50A Circuit Protection and Switching for Demanding Electrical Systems
The Blue Sea A-Series 50A Single-Pole Flat Rocker Circuit Breaker offers a streamlined, high-reliability solution for managing and protecting your electrical distribution panels. By combining manual on-off switching and automatic overcurrent circuit protection into a single device, it eliminates the need for separate switches and fuse holders. This saves valuable space behind the dash or control panel while reducing the number of connection points that could potentially fail over time.
Engineered to meet the rigorous standards of marine, RV, caravan, and off-grid power systems, this 50A circuit breaker provides dependable performance where electrical safety is paramount. Whether you are wiring a custom 12V or 24V auxiliary battery setup or upgrading an existing marine switchboard, the Blue Sea Systems A-Series ensures your heavy-duty appliances and wiring looms remain safe from damaging short circuits and overloads.
Magnetic-Hydraulic Precision vs Thermal Breakers
Unlike standard thermal circuit breakers that rely on heat to trigger a trip, the A-Series utilises an advanced magnetic-hydraulic mechanism. Standard thermal units can suffer from nuisance tripping in hot engine bays, canopies, or enclosed electrical cabinets because high ambient temperatures affect their trip threshold. A magnetic-hydraulic circuit breaker only responds to the actual electrical current flowing through the circuit. This ensures consistent, accurate 50A overcurrent protection regardless of fluctuating Australian weather conditions or hot internal cabin environments.
Ergonomic Flush Rocker and Trip-Free Safety
Accidental switching of critical circuits, such as bilge pumps, fridges, or telemetry systems, is a common hazard in compact mobile workspaces and high-traffic helm areas. The flat rocker actuator is specifically designed to sit completely flush with the mounting bezel when in the ON position. This low-profile geometry greatly reduces the risk of bumped knees or snagged gear inadvertently shutting down essential 24-hour circuits. When tripped or switched OFF, the actuator tilts out to reveal a bright colour indicator for immediate visual status confirmation.
To further mitigate electrical risks, this unit incorporates an internal trip-free design. In the event of a severe fault-current condition or dead short, the breaker will trip internally and cut power even if the rocker actuator is physically held or jammed in the ON position. This vital safety feature protects your wiring insulation from melting and significantly reduces fire hazards.
Key Features and Benefits
- Dual-Function Design: Combines heavy-duty 50A overcurrent protection and manual on-off switching into one compact panel-mount component.
- Magnetic-Hydraulic Operation: Delivers precise, temperature-independent trip characteristics to prevent nuisance tripping in hot environments.
- Flush-Mount Rocker Actuator: Sits level when ON to prevent accidental actuation in tight quarters, with clear colour visibility when in the OFF position.
- Trip-Free Safety Mechanism: Cannot be manually held closed during an active electrical fault, protecting equipment and wiring from severe damage.
- Versatile Mounting Orientation: Features clean international ON/OFF symbols that support both vertical and horizontal panel installations.
- Secure Electrical Connections: Built with high-quality brass threaded inserts and robust terminals to ensure stable, corrosion-resistant mounting and wiring in high-vibration applications.
Built for Marine, RV, and Off-Grid Applications
From offshore vessels navigating rough seas to 4WD touring canopies tackling corrugated outback tracks, electrical components must withstand constant vibration and harsh environments. The Blue Sea A-Series is widely recognised by marine electricians and custom automotive builders as an industry benchmark for durability and clean panel aesthetics. The clearly visible 50A rating on the front face makes system diagnostics and maintenance straightforward.
Upgrade Your Electrical Panel
Select the Blue Sea A-Series 50A Flat Rocker Circuit Breaker for your next custom switch panel or power distribution upgrade to ensure safe, reliable control over your critical electrical circuits.
SKU: BS-7408B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Circuit breaker |
| Component subtype | Circuit breaker |
| Switching function | On-off |
| SKU: | BS-7408B |
| Model #: | BS-7408B |
| MPN: | BS-7408B |
| Package weight: | 0.144 kg |
| Package length: | 0.09 m |
| Package width: | 0.06 m |
| Package height: | 0.08 m |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, depending on the nature of the fault and the requirements of Australian Consumer Law.
Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase and a clear description of the fault.
Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.
Making a Warranty Claim
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms and continued availability.
Australian Consumer Law
This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

