Description
Blue Sea 7039 50A Thermal Breaker w/ Switch | Boat Supply Store
Protect critical DC circuits on gasoline-powered vessels with the Blue Sea 7039 187-Series Thermal Circuit Breaker. This unit integrates a 50 Amp thermal breaker with a manual reset switch into a single, SAE J1171 ignition-protected housing, reducing panel space and wiring complexity. It features a 5000A @ 12V DC interrupt rating, ensuring robust protection for demanding marine applications, and a thermoset polyester case for enhanced durability.
Key Features
- Integrated Switching Consolidates circuit protection and manual ON/OFF control.
- Ignition Protected Meets SAE J1171 external ignition protection standards for safe use on gasoline vessels.
- Trip Free Design Prevents the breaker from being held closed during a fault condition.
- Waterproof Construction Engineered for harsh marine environments and direct exposure.
- Clear Lever Status Large single lever clearly indicates ON, OFF, or tripped state.
- Simplified Installation Round case design and recessed mounting holes streamline panel integration.
- Robust Terminals Equipped with substantial 5/16" terminals for secure electrical connections.
- High Interrupt Rating 5000A @ 12V DC capability to safely manage fault currents.
Specifications
| Product Specifications | |
|---|---|
| Amp Rating | 50 Amp |
| Voltage Rating | 48V DC Max |
| Type | Type III (Switchable/Manual Reset/Trip Free) Thermal Circuit Breaker |
| Ignition Protection | SAE J1171 |
| Interrupt Rating | 5000A @ 12V DC |
| Case Material | Thermoset Polyester |
| Terminal Size | 5/16" |
| Dimensions | Refer to manufacturer's data sheet for precise dimensions |
Who This Is For
Marine electricians and boat builders seeking an integrated, ignition-protected switching and circuit protection solution for DC systems will find this breaker ideal. DIY boat owners upgrading or building electrical panels for gasoline-powered vessels will appreciate its safety and consolidation benefits.
How It Compares
| Feature | Blue Sea 7039 50A Thermal Breaker w/ Switch | Blue Sea Systems 7038 187 |
|---|---|---|
| Amp Rating | 50 Amp | 40 Amp, 50 Amp |
| Voltage Rating | 48 Volts DC Maximum | 48 Volts DC Maximum, 12-24 Volts DC |
| Interrupt Rating (12V DC) | 5,000 Amperes | 5,000 Amperes, 2,500 Amperes |
| Ignition Protection | SAE J1171 | SAE J1171, SAE J1171 |
| Case Material | Thermoset Polyester | Thermoset Polyester, null |
Common Concerns Answered
Is the price point higher than basic circuit breakers?
While the Blue Sea 7039 may have a higher initial cost than simpler breakers, this is justified by its integrated switching functionality, robust construction, and critical SAE J1171 ignition protection, offering superior value and safety.
Are specific amp ratings difficult to find?
Availability of specific amp ratings can fluctuate based on demand; however, the 50 Amp rating for the 7039 model is a standard and commonly stocked option for significant power distribution needs.
Can this breaker be used in all boat types?
Yes, its SAE J1171 ignition protection makes it particularly suitable and recommended for gasoline-powered vessels, but its waterproof and robust design ensures excellent performance in any marine environment.
Frequently Asked Questions
What is the maximum DC voltage rating for the Blue Sea 7039 circuit breaker?
The Blue Sea 7039 187-Series Thermal Circuit Breaker has a maximum voltage rating of 48 Volts DC.
What is the interrupt rating of the Blue Sea 7039 circuit breaker at 12V DC?
The Blue Sea 7039 circuit breaker provides an interrupt rating of 5,000 Amperes at 12V DC.
Is the Blue Sea 7039 circuit breaker certified for ignition protection?
Yes, the Blue Sea 7039 circuit breaker is ignition protected and compliant with SAE J1171 standards.
What type of circuit breaker is the Blue Sea 7039, and does it have a manual reset?
The Blue Sea 7039 is a Type III thermal circuit breaker, featuring a switchable design with a manual reset capability and a trip-free mechanism.
Can the Blue Sea 7039 circuit breaker be safely used on gasoline-powered boats?
Absolutely. The Blue Sea 7039 is SAE J1171 ignition protected, making it specifically designed and safe for use in the potentially explosive atmospheres found around gasoline engines on boats.
