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Blue Sea 70A 285-Series Surface Mount Thermal Circuit Breaker
Blue Sea 70A 285-Series Surface Mount Thermal Circuit Breaker
SAE J1171 Ignition Protected, Weather-Resistant & Trip-Free Design
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$95.75
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DESCRIPTION
Heavy-Duty 70A Circuit Protection and Switching for Marine and Off-Grid DC Systems
The Blue Sea 285-Series 70A Surface Mount Thermal Circuit Breaker delivers dual-function efficiency by combining reliable overcurrent protection and manual switching into a single, compact device. Designed specifically for demanding marine, 4WD, and off-grid electrical environments, this unit eliminates the need for separate inline fuse holders and isolation switches. Whether you are protecting secondary battery banks, auxiliary distribution panels, or high-draw DC appliances, the 285-Series offers a streamlined, professional solution for managing your electrical circuits.
Engineered for Harsh Marine and Automotive Environments
Electrical components installed in boats, caravans, and four-wheel drives are regularly exposed to moisture, vibration, and temperature extremes. This circuit breaker features a weather-resistant construction that shields internal mechanisms from dust and water splashes. Furthermore, it meets stringent SAE J1171 external ignition protection standards. This makes it safe for installation aboard petrol-powered vessels and in battery compartments where explosive gases may accumulate, significantly reducing the risk of ignition during a thermal trip event.
To ensure long-term durability and minimal voltage drop, the unit is equipped with corrosion-resistant stainless steel terminal studs. It also includes flexible red and black terminal insulator caps, which fit snugly over the connections to prevent accidental short circuits caused by shifting cargo, tools, or stray wiring in tight enclosures.
Intuitive Operation and Trip-Free Safety
Troubleshooting electrical faults in poorly lit lockers or engine bays is simplified thanks to the high-visibility yellow reset lever. When an overcurrent event occurs, the lever swings open to provide immediate visual confirmation that the circuit has tripped. To manually isolate the circuit for maintenance or storage, simply press the integrated red trip button for instant disconnection.
For enhanced system safety, the breaker utilises a trip-free design. This vital safety feature ensures that the internal contacts cannot be manually held closed while a fault or overcurrent condition persists. This prevents catastrophic wire damage, melted insulation, and potential electrical fires that can occur when using inferior circuit protection devices.
Key Features and Benefits
- Dual-Function Design: Combines 70A thermal circuit protection and manual on/off switching in one compact unit.
- SAE J1171 Ignition Protected: Safe for installation in marine engine bays, bilges, and enclosed battery boxes.
- Trip-Free Mechanism: Cannot be forced to stay closed during an active electrical fault, protecting cabling and equipment.
- Clear Status Indication: High-contrast yellow reset lever clearly shows when the circuit is open, alongside a red push-to-trip button.
- Weather-Resistant Build: Engineered to withstand moisture, salt spray, and vibration in marine and off-road applications.
- Protected Connections: Includes stainless steel terminal studs and flexible insulator boots to guard against accidental short circuits.
- Simple Installation: Surface-mount form factor with integrated mounting holes allows for secure attachment to flat panels and bulkheads.
Application Notes and System Compatibility
The Blue Sea 285-Series is well-suited for protecting main feed lines, DC-DC chargers, solar charge controllers, and medium-duty inverters across 12V, 24V, and 48V DC architectures. Because it is a resettable thermal device, you no longer need to carry spare fuses or struggle with replacing blown links in the field.
Important Application Note: While this unit functions effectively as a circuit disconnect switch, it should not be used for frequent switching of loads where high inrush currents are expected, such as electric winches or heavy motor loads.
Upgrade Your Electrical Safety
Protect your vessel, caravan, or 4WD electrical system with dependable, marine-grade hardware. Add the Blue Sea 285-Series 70A Surface Mount Circuit Breaker to your setup today for safe, resettable power management.
SKU: BS-7185B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Circuit breaker |
| Mounting / form factor | Surface mount |
| Ignition protected | Yes |
| Standards / compliance | SAE J1171 |
| SKU: | BS-7185B |
| Model #: | BS-7185B |
| MPN: | BS-7185B |
| Package weight: | 0.324 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.
DOCUMENTS
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