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Blue Sea 120A 285-Series Panel Mount Thermal Circuit Breaker
Blue Sea 120A 285-Series Panel Mount Thermal Circuit Breaker
SAE J1171 Ignition Protected, Weather-Resistant & Trip-Free Design
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DESCRIPTION
Heavy-Duty 120A Circuit Protection and Switching for Marine and Off-Grid Systems
Managing high-amperage DC electrical loads requires dependable overcurrent protection that can withstand demanding environments. The Blue Sea 285-Series 120A Panel Mount Thermal Circuit Breaker delivers reliable protection for heavy electrical loads while combining switching and circuit protection into a single, compact device. Designed specifically for recessed panel mounting, this unit provides a clean, integrated installation on control panels, battery distribution boards, and bulkhead enclosures in marine vessels, caravans, 4WDs, and off-grid power setups.
Certified Ignition Protection for Engine Compartments
Safety is critical when installing electrical components near fuel sources. This 120A thermal circuit breaker is fully certified to meet SAE J1171 external ignition protection requirements. This certification makes it safe for installation aboard petrol-powered boats and inside enclosed engine compartments or battery boxes where explosive fumes or gases may be present. Unlike standard commercial-grade breakers that may produce an exposed internal spark when tripping under a heavy fault, the sealed architecture of the 285-Series isolates internal arcing, significantly reducing the risk of accidental ignition in volatile environments.
Intuitive Operation and Trip-Free Safety Design
Engineered for practical usability and system safety, the breaker incorporates a high-visibility yellow reset lever that drops down to provide an immediate, clear visual indication when a circuit has tripped. For routine maintenance or emergency isolation, a prominent red push-to-trip button allows you to manually interrupt the circuit and test the mechanism's mechanical function. Crucially, the unit features a trip-free design. This internal safety mechanism ensures the breaker cannot be manually held in the closed position while a fault current persists, protecting your wiring and expensive downstream electronics from severe thermal damage or electrical fire.
- Dual-Function Design: Combines heavy-duty 120A overcurrent protection and manual circuit switching into one streamlined unit.
- SAE J1171 Compliant: Certified ignition protected for safe deployment in marine bilges, engine bays, and petrol boat installations.
- Trip-Free Mechanism: Prevents the circuit from being forced closed during an active electrical fault or overload condition.
- Clear Visual Status: High-visibility yellow reset lever clearly indicates an open circuit, paired with a manual red push-to-trip button.
- Weather-Resistant Build: Sealed construction resists moisture, salt spray, and dust ingress in harsh Australian conditions.
- Flush Panel Mounting: Top and bottom mounting holes allow secure recessed installation into flat surfaces and custom electrical panels.
Application Considerations and System Integration
While the Blue Sea 285-Series is capable of functioning as both a protective device and a master disconnect switch for 12V, 24V, and 48V DC systems (up to its rated voltage limits), proper application is essential for longevity. Do not use this breaker as a regular on/off switch where high inrush currents are expected, such as directly switching large inverter capacitor banks or heavy motor loads under draw, as repeated high-inrush switching can degrade the internal thermal contacts over time.
Compared to basic single-use fuses, a resettable thermal circuit breaker eliminates the frustration of hunting for replacement fuses in the dark or while out on the water. Its robust, weather-resistant housing ensures long-term durability against vibration and coastal corrosion, making it a preferred choice for professional auto electricians and marine technicians.
Upgrade Your DC Electrical Safety
Secure your high-amperage wiring and critical dual-battery accessories with proven circuit protection. Add the Blue Sea 285-Series 120A Panel Mount Thermal Circuit Breaker to your system build today for reliable, compliant electrical distribution.
SKU: BS-7088B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Circuit breaker |
| Mounting / form factor | Panel mount |
| Ignition protected | Yes |
| Standards / compliance | SAE J1171 |
| SKU: | BS-7088B |
| Model #: | BS-7088B |
| MPN: | BS-7088B |
| Package weight: | 0.216 kg |
| Package length: | 0.1 m |
| Package width: | 0.08 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.
DOCUMENTS
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