Description
Blue Sea 7142 Thermal Circuit Breaker 80A | Boat Supply Store
For gasoline-powered vessels requiring ignition protection, this 80 Amp thermal circuit breaker reliably safeguards DC electrical systems up to 48 Volts. Its Type III, trip-free design incorporates a thermally responsive bi-metal blade, offering robust protection with an interrupt rating of 5,000A at 12V DC. This unit uniquely combines switching functionality with critical circuit protection, simplifying installation and enhancing overall vessel safety, particularly on offshore fishing platforms operating in humid Texas coastal waters.
Key Features
- Combines switching and circuit protection
- Meets SAE J1171 external ignition protection requirements
- Features clear, single lever operation
- Provides trip-free design
- Is waterproof
- Offers recessed mounting holes
- Includes large clearance around terminal studs
- Ensures ignition protected operation
Specifications
| Product Specifications | |
|---|---|
| Amp Rating | 80 Amp |
| Maximum Voltage | 48 Volt DC |
| Type | Type III - Switchable / Manual Reset - Trip Free |
| Blade Type | Thermally Responsive Bi-Metal Blade |
| Interrupt Rating (12V DC) | 5,000A |
| Interrupt Rating (24V DC) | 3,000A |
| Interrupt Rating (42V DC) | 1,500A |
| Waterproof | Yes |
| Ignition Protected | Yes |
| Compliance | SAE J1171 |
Who This Is For
Marine enthusiasts, boat owners, and marine electricians requiring reliable and integrated circuit protection and switching for DC electrical systems up to 80 amps. This breaker is particularly essential for gasoline-powered vessels where ignition protection is critical.
How It Compares
| Feature | Blue Sea 7142 Thermal Circuit Breaker 80A | Blue Sea Systems 7143 187 |
|---|---|---|
| Amp Rating | 80 Amp | 100 Amp, 50 Amp |
| Voltage Rating | 48 Volts DC Maximum | 48 Volts DC Maximum, 12-24 Volts DC |
| Ignition Protected | Yes | Yes, Yes |
| Type | Thermally Responsive Bi-Metal Blade | Thermally Responsive Bi-Metal Blade, Thermal |
| Interrupt Rating (12V DC) | 5,000 Amperes | 5,000 Amperes, null |
Common Concerns Answered
Is the lever action stiff?
Some users have noted the lever action can feel stiff initially, which is common for high-quality, robust marine-grade components designed for durability and secure engagement. This often eases with regular use.
Are replacement parts difficult to find?
While specific replacement parts can occasionally be challenging to source, the Blue Sea 7142 is designed for long-term reliability. Blue Sea Systems offers excellent product support and comprehensive manuals, and for most installations, the unit is intended for a complete replacement rather than component repair.
Why is this breaker more expensive than simpler models?
The Blue Sea 7142 integrates both circuit protection and a manual switch into a single, ignition-protected, and waterproof unit, significantly simplifying wiring and reducing installation complexity compared to separate components. Its SAE J1171 compliance also adds value for safety-critical applications.
Frequently Asked Questions
What is the voltage rating of the Blue Sea 7142 circuit breaker?
The Blue Sea 7142 circuit breaker has a maximum voltage rating of 48 Volts DC.
What is the interrupt rating of the Blue Sea 7142 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 7142 circuit breaker ignition protected?
Yes, the Blue Sea 7142 circuit breaker is ignition protected, meeting SAE J1171 requirements.
What type of circuit breaker is the Blue Sea 7142?
The Blue Sea 7142 is a Type III, switchable, manual reset, trip-free thermal circuit breaker with a thermally responsive bi-metal blade.
Can the Blue Sea 7142 be used on gasoline-powered boats?
Yes, the Blue Sea 7142 is specifically designed for use on gasoline-powered boats due to its ignition protection, which prevents sparks in potentially explosive atmospheres.
