Solar Panels
Solar Controllers
Batteries
Inverters
Mains Chargers
DC-DC Chargers
Cables/Accessories
Power Converters
Monitoring
Kits
By Application
By Brand
Blue Sea 70A 187-Series Panel Mount Thermal Circuit Breaker
Blue Sea 70A 187-Series Panel Mount Thermal Circuit Breaker
12V-48V DC Switching & Protection - Ignition Protected - M8 Studs
Regular price
$167.82
Availability:
Special Order
View all products from Blue Sea
Guaranteed Safe and Secure Checkout
0
DESCRIPTION
Heavy-Duty DC Circuit Protection and Manual Switching for Marine and Off-Grid Systems
The Blue Sea 187-Series 70A Panel Mount Thermal Circuit Breaker delivers dual-function capability by combining reliable overcurrent protection and manual circuit switching into a single, compact device. Designed for demanding electrical environments, this 70A circuit breaker eliminates the need for separate switches and fuse holders, streamlining your electrical board while saving valuable installation space. Whether you are outfitting a commercial vessel, upgrading a 4WD dual-battery system, or building an off-grid caravan power setup, the 187-Series provides dependable management for high-amperage DC loads.
Engineered to handle systems up to a maximum voltage rating of 48V DC, this unit is highly versatile and suitable for 12V, 24V, and 48V battery banks. The recessed mounting holes and flush panel-mount profile ensure a clean, professional finish on dashboards, control panels, and inside power distribution enclosures.
Engineered for Safety: Trip-Free and Ignition Protected
In high-current DC systems, equipment failure or short circuits can present significant hazards. The Blue Sea 187-Series mitigates these risks through a dedicated trip-free mechanism. This critical safety feature ensures the internal contacts cannot be manually held in the closed (ON) position while a fault current condition persists, protecting your wiring harness and connected appliances from thermal damage.
Furthermore, this marine circuit breaker is certified ignition protected. It is specifically sealed to prevent internal sparks from igniting surrounding flammable gases, making it safe for installation in the engine rooms of petrol-powered boats or near battery compartments and gas cylinders in RVs and camper trailers.
Key Features and Benefits
- Dual-Function Design: Combines heavy-duty 70A overcurrent protection and manual ON/OFF switching in one integrated unit.
- High-Visibility Status Lever: The single yellow reset lever clearly indicates the trip status and can be mounted vertically or horizontally for intuitive operation.
- Heavy-Gauge Terminal Clearance: Equipped with robust 5/16" (Approx. M8) stud terminals that support high-torque connections and provide ample clearance for large wire lugs.
- Trip-Free Safety Mechanism: Prevents the breaker from being forced or held on during an active electrical fault.
- Ignition Protected: Safe for installation aboard petrol-powered marine vessels and enclosed utility spaces.
- Multi-Voltage Compatibility: Rated up to 48V DC maximum, easily supporting standard 12V, 24V, and 48V DC electrical architectures.
Built to Outperform Standard Breakers
Many standard thermal breakers suffer from voltage drop, loose connections, and premature tripping due to inferior internal components and undersized studs. The Blue Sea Systems 187-Series overcomes these common issues with heavy-duty 5/16" (Approx. M8) terminal studs that accommodate heavy-gauge cables without crowding. The self-trimming case and clean bezel layout provide a refined aesthetic while resisting moisture and corrosion in harsh coastal and off-road environments.
Important Application Note: Do not use this circuit breaker as a manual switch where high inrush currents are expected, as repeated switching under heavy surge loads can degrade the internal contacts over time.
Ideal Applications
- Main circuit protection for 12V, 24V, and 48V auxiliary battery systems in 4WDs, caravans, and motorhomes
- Marine power distribution panels and petrol engine bay installations
- Protecting high-draw DC appliances, inverter chargers, and DC-DC chargers
- Isolating solar charge controllers or auxiliary sub-panels for safe maintenance
Upgrade Your DC Circuit Protection
Secure your electrical system against overloads and short circuits with industry-standard marine-grade hardware. Add the Blue Sea 187-Series 70A Panel Mount Thermal Circuit Breaker to your build today for reliable switching and fault protection.
SKU: BS-7041B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Circuit breaker |
| Mounting / form factor | Panel mount |
| Ignition protected | Yes |
| Terminal size | 5/16 M8 |
| SKU: | BS-7041B |
| Model #: | 187 Series |
| MPN: | 187 Series |
| Package weight: | 0.3 kg |
| Package length: | 0.11 m |
| Package width: | 0.1 m |
| Package height: | 0.11 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
Loading product documents…