Description
Blue Sea 7066 20A Low Profile Circuit Breaker | Boat Supply Store
This Blue Sea Systems 7066 circuit breaker provides a manually resettable, thermal-trip solution for protecting vessel electrical circuits, directly replacing common ATO/ATC fuses. With a 20 Amp rating and a 28V DC maximum voltage, it offers superior safety and convenience compared to sacrificial fuses, especially critical for systems like trolling motors or bilge pumps on Texas bass boats. Engineered for reliability, it features a 2000A @ 28V DC interrupt capacity, ensuring safe operation even under significant fault conditions and operating within a -30°C to 77°C temperature range.
Key Features
- Direct replacement for ATO and ATC blade style fuses
- Manually resettable push-button operation
- Compliant with ABYC circuit protection requirements
- Compatible with Water-Resistant ST-Blade Fuse Block (cover secured)
- Compatible with all other ST-Blade Fuse blocks (cover removed)
- 20 Amp continuous current rating
- 28V DC maximum operating voltage
- High interrupt capacity for enhanced safety
Specifications
| Product Specifications | |
|---|---|
| Brand | Blue Sea Systems |
| SKU | 7066 |
| Amperage Rating | 20 Amp |
| Voltage Rating | 28V DC |
| Interrupt Capacity | 2000A @ 28V DC |
| Trip Type | Thermal Trip |
| Reset Type | Manual Push-Button Reset |
| Operating Temperature | -30°C to 77°C |
| Compatibility | ATO/ATC-Style Blade Fuses, Blue Sea ST-Blade Fuse Blocks |
| Pack Size | 2-Pack |
Who This Is For
This product is designed for marine enthusiasts and boat owners seeking a reliable, resettable circuit protection upgrade over standard disposable fuses. It is ideal for DIYers looking to enhance the safety and convenience of their vessel's electrical systems.
How It Compares
| Feature | Blue Sea 7066 20A Low Profile Circuit Breaker | Competitor |
|---|---|---|
| Type | Low Profile Circuit Breaker | ATO/ATC Blade Fuse |
| Reset Type | Manual Push Button Reset | Non-resettable |
| Amperage | 20 Amp | 20 Amp |
| Maximum Voltage | 28V DC | 32V DC |
| Interrupt Capacity | 2000A @ 28V DC | 1000A @ 32V DC |
Common Concerns Answered
Why is this circuit breaker more expensive than a standard fuse?
The higher initial cost reflects the advanced engineering and functionality of a resettable thermal-trip circuit breaker, offering enhanced safety, durability, and convenience over single-use sacrificial fuses, which translates to long-term value and reduced maintenance.
I'm not familiar with circuit breakers. How do they differ from fuses?
A fuse is a sacrificial device designed to melt and break a circuit when overloaded, requiring replacement. A circuit breaker, like this Blue Sea 7066, uses a thermal trip mechanism to open the circuit and can be manually reset, providing a reusable protection solution.
Will this breaker be reliable in a harsh marine environment?
Yes, Blue Sea Systems products are specifically engineered for marine applications, meeting ABYC requirements and designed to operate reliably within a -30°C to 77°C temperature range, ensuring consistent performance in challenging conditions.
Frequently Asked Questions
What is the difference between a low-profile circuit breaker and a standard ATO/ATC fuse?
A low-profile circuit breaker, such as the Blue Sea 7066, is a resettable device that occupies a similar footprint to standard ATO/ATC fuses, offering the convenience of a manual reset button and thermal trip protection rather than requiring fuse replacement after an overcurrent event.
Can this circuit breaker be used in a marine environment?
Absolutely. The Blue Sea 7066 is specifically designed and rated for marine use, complying with ABYC standards and built to withstand the demanding conditions found on board a vessel.
What is the maximum voltage this circuit breaker can handle?
This Blue Sea 7066 circuit breaker is rated for a maximum voltage of 28V DC, suitable for standard 12V and 24V DC marine electrical systems.
How do I reset this circuit breaker if it trips?
To reset the Blue Sea 7066, simply press the integrated push-button located on the top of the breaker once the fault condition has been cleared.
Is this circuit breaker compatible with all Blue Sea ST-Blade fuse blocks?
Yes, the Blue Sea 7066 is designed as a direct replacement for ATO/ATC fuses and is compatible with all Blue Sea ST-Blade fuse blocks. It is compatible with the Water-Resistant ST-Blade Fuse Block when the cover is secured, and with all other ST-Blade Fuse blocks when the cover is removed.
