Description
Blue Sea 7043 Thermal Circuit Breaker 90A | Boat Supply Store
Engineered for robust DC power distribution on gasoline-powered vessels, this 90-amp thermal circuit breaker integrates switching and protection. Its Type III, trip-free bi-metal blade design ensures reliable operation across a 12V to 42V DC range, with a maximum voltage rating of 48V DC. Compliant with SAE J1171 for external ignition protection, it safeguards against potential ignition sources in engine compartments, a critical safety feature for offshore fishing boats operating in demanding environments.
Key Features
- Integrated Switching Reduces component count by combining breaker and switch functions.
- Ignition Protected SAE J1171 compliant for safe use in gasoline-powered engine spaces.
- Trip-Free Design Prevents the breaker from being held closed when an overload condition exists.
- Manual Reset Offers convenient manual reset functionality after a trip.
- Waterproof Construction Ensures reliable performance in wet marine environments.
- Easy Status Indication Large lever clearly indicates trip status.
- Simplified Installation Round case and recessed mounting holes facilitate panel integration.
- Robust Terminals Features 5/16" terminals for secure, high-current connections.
Specifications
| Product Specifications | |
|---|---|
| Amperage Rating | 90 Amp |
| Maximum Voltage Rating | 48V DC |
| Circuit Breaker Type | Type III (Switchable/Manual Reset/Trip Free) Thermally Responsive Bi-Metal Blade |
| Interrupt Rating | 5,000A @ 12V DC, 3,000A @ 24V DC, 1,500A @ 42V DC |
| Case Material | Thermoset Polyester |
| Operating Temperature | -25°C to +82°C |
| Ignition Protection | SAE J1171 |
Who This Is For
Marine enthusiasts and professional technicians seeking reliable, integrated circuit protection and switching for 12V, 24V, or 42V DC systems. Essential for builders and owners of gasoline-powered vessels requiring critical ignition protection.
How It Compares
| Feature | Blue Sea 7043 Thermal Circuit Breaker 90A | Blue Sea Systems 7044 187 Series Thermal Circuit Breaker |
|---|---|---|
| Amperage Rating | 90 Amp | 100 Amp, 90 Amp |
| Maximum Voltage Rating | 48 Volts DC | 48 Volts DC, 32 Volts DC |
| Interrupt Rating (12V DC) | 5,000 Amperes | 5,000 Amperes, 2,500 Amperes |
| Ignition Protected | Yes (SAE J1171) | Yes (SAE J1171), Yes |
| Trip Free Design | Yes | Yes, Yes |
| Waterproof | Yes | Yes, Yes |
Common Concerns Answered
Is the price higher than other circuit breakers?
While the initial investment may exceed that of non-marine or non-ignition-protected breakers, the Blue Sea 7043's certified ignition protection (SAE J1171) and integrated switching offer superior safety and system simplification essential for marine applications, justifying the cost.
Will this breaker trip too easily or not easily enough?
The most common user error involves selecting an amperage rating that does not align with the specific load requirements of the protected circuit. Proper application engineering is critical to ensure optimal performance. Always consult your vessel's electrical diagrams or a qualified marine electrician.
How complex is the installation?
Installation is rated at a difficulty of 2, requiring basic electrical knowledge. Panel mounting and correct wire termination are essential. Crucially, selecting the appropriate wire gauge for the 90A rating is paramount for safe and effective operation.
Frequently Asked Questions
What is the amperage rating of the Blue Sea 7043 circuit breaker?
The Blue Sea 7043 circuit breaker has an amperage rating of 90 Amps.
What is the voltage rating of the Blue Sea 7043 circuit breaker?
The Blue Sea 7043 circuit breaker has a maximum voltage rating of 48 Volts DC.
Is the Blue Sea 7043 circuit breaker ignition protected?
Yes, the Blue Sea 7043 circuit breaker is ignition protected and compliant with SAE J1171 external ignition protection standards.
What type of circuit breaker is the Blue Sea 7043?
The Blue Sea 7043 is a Type III, switchable, manual reset, trip-free, thermally responsive bi-metal blade circuit breaker.
What is the interrupt rating of the Blue Sea 7043 circuit breaker?
The interrupt rating for the Blue Sea 7043 circuit breaker is 5,000A @ 12V DC, 3,000A @ 24V DC, and 1,500A @ 42V DC.
