Blue Sea 5A C-Series Single-Pole Flat Rocker Circuit Breaker
Blue Sea 5A C-Series Single-Pole Flat Rocker Circuit Breaker
Trip-Free Overcurrent Protection, Flush ON Actuator & 5/16" (M8) Studs

DESCRIPTION
Combined Manual Switching and Reliable Overcurrent Protection
The Blue Sea C-Series 5A Single-Pole Flat Rocker Circuit Breaker provides a streamlined, dual-function solution for complex marine, RV, and off-grid electrical architectures. By combining manual on-off switching and precision overcurrent protection into a single panel-mounted device, it eliminates the need for separate inline fuses and isolation switches. While the C-Series platform is widely recognised for managing heavy-duty equipment like inverters, bow thrusters, and windlasses, this 5A rated model is specifically suited for safeguarding sensitive low-amperage auxiliary loads, control circuits, and monitoring equipment within larger power distribution panels.
Ergonomic Flush-Mount Design for High-Traffic Areas
Traditional toggle switches and standard circuit breakers often protrude from the dashboard, creating a constant hazard for snagging clothing, ropes, or gear in confined spaces like boat helms and caravan walkways. The C-Series flat rocker actuator directly resolves this issue by sitting completely flush when in the ON position. This low-profile ergonomics strategy substantially reduces the risk of accidental switching during rough seas or off-road transit. Furthermore, the actuator features a distinct colour indicator that becomes visible only in the OFF position, allowing operators to verify circuit status at a glance.
Engineered for Safety: Trip-Free Operation
When managing electrical systems in remote or marine environments, reliable fault isolation is paramount to preventing wire insulation damage and thermal hazards. This Blue Sea Systems breaker incorporates an internal trip-free mechanism. In the event of an overcurrent fault or short circuit, the internal contacts will disconnect and cannot be manually held closed to override the trip. This critical safety feature ensures that the circuit remains isolated until the underlying electrical fault is properly diagnosed and resolved, offering superior risk reduction compared to basic switching components.
Key Features and Technical Advantages
- Dual-Function Efficiency: Integrates manual circuit isolation and 5A overcurrent protection into one compact footprint.
- Flush ON Actuator: Flat rocker design sits level with the mounting bezel when active, preventing accidental actuation and snagging.
- Trip-Free Safety Mechanism: Internal contacts disengage during a fault condition and cannot be forced closed, protecting wiring and connected devices.
- Visual Status Indication: High-visibility colour actuator clearly displays when the circuit is in the OFF or tripped state.
- Heavy-Duty Termination: Equipped with 5/16-inch (Approx. M8) stud terminals on the bus to accommodate substantial ring terminals and ensure low-resistance connections.
- Secure Panel Mounting: Features integrated brass mounting inserts for straightforward, durable front-panel installation without stripping threads.
Seamless Integration into Custom Switch Panels
Constructed for longevity in demanding environments, the BS-7540B is an ideal choice for boat builders, auto electricians, and DIY system integrators designing custom switch panels. The robust 5/16-inch (Approx. M8) terminal studs allow for secure integration with standard heavy-duty busbars and cabling, while the front-facing brass threaded inserts ensure a rigid mount against metal or composite dashboards. Whether you are protecting an inverter remote sense wire, a relay control loop, or vital navigation electronics, this C-Series breaker delivers consistent, professional-grade performance.
Upgrade Your Electrical Panel Protection
Ensure your low-amperage auxiliary circuits and control systems are safeguarded against electrical faults. Integrate the Blue Sea C-Series 5A Flat Rocker Circuit Breaker into your marine, caravan, or off-grid power distribution board today for dependable switching and overcurrent defence.
SKU: BS-7540B
SPECIFICATIONS
| Product type | Circuit breaker |
|---|---|
| Actuator type | Flat rocker |
| Switching function | On-off |
| Pole configuration | Paralleled poles |
| Terminal | 5/16-inch stud on bus |
| Actuator position | Flush in the ON position |
| OFF indication | Color actuator |
| Protection | Overcurrent protection for inverters, bow thrusters, and windlasses |
| Trip behavior | Trip free; cannot be held closed after trip |
| SKU: | BS-7540B |
| Model #: | BS-7540B |
| MPN: | BS-7540B |
| Package weight: | 0.3 kg |
| Package length: | 0.12 m |
| Package width: | 0.09 m |
| Package height: | 0.09 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.

