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Blue Sea 150A 187-Series Panel Mount Thermal Circuit Breaker
Blue Sea 150A 187-Series Panel Mount Thermal Circuit Breaker
Up to 48V DC, Ignition Protected, Trip-Free & 5/16" (M8) Studs
Regular price
$167.82
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DESCRIPTION
Heavy-Duty 150A DC Circuit Protection and Manual Switching
The Blue Sea 187-Series 150A Panel Mount Thermal Circuit Breaker delivers dual-function utility by combining reliable overcurrent protection and manual on/off switching into a single, compact device. Engineered for demanding 12V, 24V, and up to 48V DC electrical systems, this heavy-duty breaker eliminates the need for separate fuse holders and battery switches, simplifying your wiring topology and saving valuable installation space in marine vessels, 4WDs, caravans, and off-grid power setups.
Unlike standard auto-grade breakers that can suffer from nuisance tripping, premature mechanical wear, or dangerous arcing under load, the Blue Sea 187-Series is built to strict marine-grade standards. Its robust housing and precision internal mechanisms ensure accurate thermal response to overloads and short circuits, safeguarding expensive cabling, inverters, and auxiliary battery banks from thermal damage and electrical fire risks.
Engineered for Safety: Ignition Protected and Trip-Free
When installing high-amperage DC protection in confined spaces or marine engine compartments, safety is paramount. This 150A thermal circuit breaker is fully ignition protected, making it safe for installation aboard petrol-powered boats and near battery banks where explosive gases may accumulate. Furthermore, the internal mechanism features a failsafe "trip-free" design. In the event of a fault current condition, the breaker will trip and cannot be manually held in the "on" position, preventing operators from overriding the safety mechanism until the underlying electrical fault is resolved.
Key Features and Benefits
- Dual-Function Design: Combines heavy-duty 150A circuit protection with manual on/off switching in one unit, reducing connection points and voltage drop.
- Trip-Free Mechanism: Ensures the circuit breaker cannot be forced or held closed during an active fault condition, protecting wiring and connected equipment.
- High-Visibility Manual Lever: The contrasting yellow actuator clearly indicates trip status and allows for easy manual disconnection, visible in either vertical or horizontal mounting orientations.
- Heavy-Duty Terminal Studs: Equipped with robust 5/16" (Approx. M8) tin-plated copper studs that provide high-torque connections and generous clearance for heavy-gauge cable lugs.
- Ignition Protected: Certified safe for installation in marine engine rooms and compartments on petrol-powered vessels.
- Clean Panel Integration: Recessed mounting holes offer a flush, professional appearance on switchboards, bulkheads, and custom electrical panels.
Application Considerations and Best Practices
Designed for systems up to 48V DC maximum, the Blue Sea BS-7048B is ideal for main DC feed protection, high-output alternator charging circuits, DC-to-DC chargers, and windlass or winch isolation. The large 5/16" (Approx. M8) terminal studs easily accommodate the substantial cable lugs required to carry 150A safely, minimising resistance and heat build-up at the termination point.
Important Application Note: While this unit functions as a manual disconnect switch for maintenance and isolation, do not use this breaker as a regular switch where high inrush currents are expected (such as repeatedly switching un-precharged inverter capacitors under load), as this can accelerate contact wear over time.
Upgrade Your DC Electrical Safety
Equip your marine, caravan, or off-grid 12V to 48V power system with industry-leading overcurrent protection. Add the Blue Sea 187-Series 150A Panel Mount Thermal Circuit Breaker to your setup today for dependable, marine-grade circuit management.
SKU: BS-7048B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Circuit breaker |
| Mounting / form factor | Panel mount |
| Switching logic | Manual |
| Switching function | On/off |
| Actuator type | Manual lever |
| Terminal size | 5/16 in (M8) |
| Ignition protected | Yes |
| SKU: | BS-7048B |
| Model #: | BS-7048B |
| MPN: | BS-7048B |
| Package weight: | 0.24 kg |
| Package length: | 0.09 m |
| Package width: | 0.06 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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