Description
Blue Sea 7038 Thermal Circuit Breaker 40A | Boat Supply Store
For vessels requiring integrated switching and overload protection, the Blue Sea 7038 187-Series Thermal Circuit Breaker provides a robust solution. This unit combines a Type III, trip-free thermal breaker with a manual reset and switch functionality, boasting an SAE J1171 external ignition protection compliance critical for gasoline-powered craft. With a maximum voltage rating of 48V DC and an interrupt rating of 5000A at 12V DC, it ensures system integrity in demanding marine environments, such as offshore fishing expeditions off the Texas coast.
Key Features
- Integrated switching and circuit protection
- Ignition protection compliant with SAE J1171
- Trip-free design prevents manual defeat
- Waterproof construction for marine environments
- Clear, single lever for operational status
- Self-trimming case simplifies installation
- Round case design for easy mounting
- Robust 5/16" terminal studs
Specifications
| Product Specifications | |
|---|---|
| Amperage Rating | 40A |
| Maximum Voltage Rating | 48V DC |
| Circuit Breaker Type | Type III (Switchable/Manual Reset/Trip Free) Thermally Responsive Bi-Metal Blade |
| Case Material | Thermoset Polyester |
| Ignition Protection | SAE J1171 |
| Waterproof | Yes |
| Terminal Size | 5/16" |
| Interrupt Rating @ 12V DC | 5000A |
| Interrupt Rating @ 24V DC | 3000A |
| Interrupt Rating @ 42V DC | 1500A |
| Operating Temperature | -25°C to +82°C |
Who This Is For
Marine enthusiasts and boat owners operating 12V, 24V, or 42V DC systems will find this breaker invaluable, especially those on gasoline-powered vessels where strict ignition protection is mandated. Marine electricians will appreciate its integration capabilities and compliance with safety standards.
How It Compares
| Feature | Blue Sea 7038 Thermal Circuit Breaker 40A | Blue Sea Systems 7039 187 Series Thermal Circuit Breaker |
|---|---|---|
| Amperage Rating | 40A | 50A, 40A |
| Maximum Voltage Rating | 48 Volts DC | 48 Volts DC, 12-24V DC |
| Circuit Breaker Class | Type III - Switchable / Manual Reset - Trip Free | Type III - Switchable / Manual Reset - Trip Free, Thermal |
| Ignition Protection | SAE J1171 Compliant | SAE J1171 Compliant, SAE J1171 Compliant |
| Waterproof | Yes | Yes, Yes |
| Self-trimming Case | Yes | Yes, No |
Common Concerns Answered
Are there any issues finding specific amperage ratings for this breaker?
While the 40A rating is a standard offering, occasional sourcing challenges for very specific amperages can occur in the broader market. However, Boat Supply Store maintains robust inventory for popular ratings like the 40A Blue Sea 7038.
Why is this circuit breaker more expensive than non-marine grade alternatives?
The Blue Sea 7038's price reflects its specialized marine design, including SAE J1171 ignition protection, a waterproof enclosure, and a trip-free mechanism, all engineered for the corrosive and demanding marine environment, ensuring superior longevity and safety over general-purpose breakers.
What is the primary advantage of this specific breaker over a standard breaker?
This unit uniquely combines a 40A circuit breaker with a manual switch function in a single, ignition-protected, and waterproof package, simplifying wiring and reducing installation complexity while enhancing safety on board.
Frequently Asked Questions
What is the maximum DC voltage rating for the Blue Sea 7038 circuit breaker?
The Blue Sea 7038 187-Series Thermal Circuit Breaker is rated for a maximum of 48 Volts DC.
What are the interrupt ratings for the Blue Sea 7038 circuit breaker at different voltages?
The interrupt ratings are 5000A at 12V DC, 3000A at 24V DC, and 1500A at 42V DC.
Is the Blue Sea 7038 circuit breaker designed for use in potentially explosive atmospheres on a boat?
Yes, the Blue Sea 7038 is SAE J1171 external ignition protection compliant, making it suitable for gasoline-powered vessels where ignition hazards exist.
What type of circuit breaker functionality does the Blue Sea 7038 offer?
It is a Type III circuit breaker, featuring switchable operation, manual reset, and a trip-free design, meaning it cannot be held closed against an overload.
Can the Blue Sea 7038 circuit breaker be safely installed and operated on boats with gasoline engines?
Absolutely. Its SAE J1171 ignition protection rating specifically allows for safe use on gasoline-powered boats, preventing ignition of fuel vapors.
