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Blue Sea 40A A-Series Double Pole Toggle Circuit Breaker Black
Blue Sea 40A A-Series Double Pole Toggle Circuit Breaker Black
Magnetic-Hydraulic Trip-Free Design with Linked Actuator for Panels
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DESCRIPTION
Magnetic-Hydraulic Circuit Protection and Switching for Electrical Panels
The Blue Sea Systems A-Series 40A Double-Pole Toggle Circuit Breaker combines reliable circuit switching and overcurrent protection into a single, compact device. Designed specifically as the industry standard for Blue Sea Systems electrical panels, this breaker is suited to demanding marine, caravan, RV, and off-grid power distribution systems where safety and space efficiency are paramount.
By integrating both functions, this unit eliminates the need for separate switches and fuse holders, streamlining your switchboard layout and reducing potential failure points in your wiring harness. The black toggle actuator features clear amperage identification printed directly on the lever, allowing for rapid circuit recognition during operation or troubleshooting.
Why Choose Magnetic-Hydraulic Technology?
Unlike standard thermal circuit breakers that rely on heat-sensitive bimetallic strips, the A-Series utilises advanced magnetic-hydraulic operation. Standard thermal breakers can suffer from nuisance tripping in hot engine bays, enclosed electrical cabinets, or high-temperature Australian climates because ambient heat affects their trip threshold. Conversely, a magnetic-hydraulic mechanism responds strictly to actual current flow through a magnetic coil and hydraulic damping fluid.
This engineering ensures the 40A trip rating remains stable and predictable across a wide range of ambient temperatures. It reduces the risk of unexpected power dropouts when operating near capacity on hot days, while ensuring immediate disconnection when a genuine overload or short circuit occurs.
Key Features and Design Benefits
- Simultaneous Double-Pole Switching: Features a heavy-duty linked toggle actuator bar that mechanically connects both poles, ensuring simultaneous disconnection across both lines when tripped or manually switched off.
- Trip-Free Safety Mechanism: Engineered with an internal trip-free design, meaning the contacts cannot be manually held in the ON position while a fault current condition persists, protecting wiring and appliances from damage.
- Temperature-Stable Performance: Magnetic-hydraulic trip mechanism is unaffected by ambient temperature fluctuations, preventing nuisance tripping in warm enclosures.
- Vibration-Resistant Mounting: Equipped with secure brass threaded mounting inserts that provide durable, vibration-resistant installation into electrical panels across rough corrugated roads or choppy waters.
- Compact Footprint: Space-saving two-pole configuration allows for high-density multi-circuit protection within confined switchboard spaces.
Applications in Marine, RV, and Off-Grid Systems
A double-pole circuit breaker is essential whenever two conductors must be isolated at the same time. In AC electrical systems (such as shore power inlets, inverter outputs, or generator transfers), breaking both the active and neutral conductors simultaneously is critical for safety and regulatory compliance. In DC systems, double-pole breakers are frequently utilised to isolate both positive and negative lines in sensitive electronics or isolated ground systems, or to protect dual circuits that must operate in tandem.
Whether you are building a custom distribution board from scratch, upgrading an ageing marine helm, or replacing a faulty breaker in a pre-configured Blue Sea Systems panel, the BS-7239B provides dependable, professional-grade circuit management.
Upgrade Your Electrical Panel Protection
Ensure your vessel, caravan, or off-grid power system is protected against electrical faults with temperature-stable, dual-pole switching. Add the Blue Sea A-Series 40A Double-Pole Circuit Breaker to your kit today for a clean, compliant, and durable panel installation.
SKU: BS-7239B
SPECIFICATIONS
| Specification | Details |
|---|---|
| Product type | Circuit breaker |
| SKU: | BS-7239B |
| Model #: | BS-7239B |
| MPN: | BS-7239B |
| Package weight: | 0.216 kg |
| Package length: | 0.09 m |
| Package width: | 0.08 m |
| Package height: | 0.1 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.
DOCUMENTS
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