Description
Blue Sea 7140 60A Thermal Breaker w/Switch | Boat Supply Store
Designed for critical DC systems aboard gasoline-powered vessels, this 60-amp thermal circuit breaker provides essential protection and integrated switching. It offers a Type III manual reset with a trip-free mechanism, ensuring circuit integrity up to 48 Volts DC and an impressive interrupt rating of 5,000 Amperes at 12V DC. Its SAE J1171 ignition protection makes it a vital component for safe operation in potentially explosive environments on boats navigating the Gulf Coast.
Key Features
- Integrated Switching Combines circuit protection with manual ON/OFF control.
- Ignition Protection Meets SAE J1171 standards, ensuring safety on gasoline vessels.
- Trip-Free Design Prevents the breaker from being held closed during a fault.
- Manual Reset Allows for easy restoration of power after a trip.
- Robust Terminals 5/16" studs accept heavy-gauge wire lugs for secure connections.
- Waterproof Construction Engineered for harsh marine environments.
- Clear Status Indication Large lever clearly displays tripped or ON status.
- Compact Design Recessed mounting holes contribute to a clean installation.
Specifications
| Product Specifications | |
|---|---|
| Amp Rating | 60 Amp |
| Type | Type III (Switchable / Manual Reset - Trip Free) |
| Thermally Responsive Bi-Metal Blade | Yes |
| Thermoset Polyester Case | Yes |
| Maximum DC Voltage | 48 Volts DC |
| Interrupt Rating @12V DC | 5,000 Amperes |
| Interrupt Rating @24V DC | 3,000 Amperes |
| Interrupt Rating @42V DC | 1,500 Amperes |
| Operating Temperature Range | -25°C to +82°C |
| Ignition Protected | Yes |
| Terminal Size | 5/16" |
Who This Is For
Marine enthusiasts and boat owners requiring reliable, integrated switching and circuit protection for DC electrical systems. Essential for gasoline-powered vessels where SAE J1171 ignition protection is mandatory for safety.
How It Compares
| Feature | Blue Sea 7140 60A Thermal Breaker w/Switch | SAE J1171 |
|---|---|---|
| Amp Rating | 60 Amp | 70 Amp |
| Voltage Rating Maximum | 48 Volts DC | 48 Volts DC |
| Interrupt Rating @12V DC | 5,000 Amperes | 5,000 Amperes |
| Ignition Protection | Yes (SAE J1171) | Yes |
| Type | Type III - Switchable / Manual Reset - Trip Free | Type III - Switchable / Manual Reset - Trip Free |
Common Concerns Answered
Are there any limitations with wire gauge on the Blue Sea 7140?
The robust 5/16" terminals accommodate heavy gauge wire lugs, but extremely large gauge wires may require specific preparation or specialized lugs for optimal connection.
Is this breaker more expensive than alternatives?
While the price point reflects its integrated switching and superior ignition protection, it offers a consolidated solution compared to purchasing separate components, justifying the investment for critical safety and convenience.
When would I NOT need this specific breaker?
If your application does not require integrated switching functionality or strict SAE J1171 ignition protection standards, simpler, non-switchable breakers might suffice for basic circuit protection.
Frequently Asked Questions
What is the voltage rating of the Blue Sea 7140 circuit breaker?
The Blue Sea 7140 187-Series Thermal Circuit Breaker has a maximum voltage rating of 48 Volts DC.
What is the interrupt rating of the Blue Sea 7140 circuit breaker?
The interrupt rating is 5,000 Amperes at 12V DC, 3,000 Amperes at 24V DC, and 1,500 Amperes at 42V DC.
Is the Blue Sea 7140 circuit breaker ignition protected?
Yes, the Blue Sea 7140 is ignition protected, meeting SAE J1171 external ignition protection standards, making it safe for installation aboard gasoline-powered boats.
What type of circuit breaker is the Blue Sea 7140?
The Blue Sea 7140 is a Type III thermal circuit breaker with a switchable manual reset and a trip-free design.
What is the operating temperature range for the Blue Sea 7140 circuit breaker?
The operating temperature range for the Blue Sea 7140 circuit breaker is from -25°C to +82°C.
