Description
Blue Sea 7443 20A DC Circuit Breaker | Boat Supply Store
Engineered for the most demanding marine electrical systems, this breaker provides essential overcurrent protection where regulatory compliance is paramount. It features a robust magnetic hydraulic trip-free mechanism with a 10,000A interrupt capacity, safeguarding against fault currents up to this significant level. Its UL-489 certification is a critical requirement for government and commercial vessels operating under stringent standards, ensuring operational integrity and safety in critical applications.
Key Features
- Certified UL-489 compliance for critical marine applications
- Robust Magnetic Hydraulic - Trip Free mechanism prevents nuisance tripping and manual override
- High Interrupt Capacity of 10,000A for superior fault protection
- Specific 20A DC rating ensures precise circuit protection
- Durable Flat Rocker actuator for user-friendly operation
- Reliable 1 Pole configuration for single circuit control
- Safe 80V DC maximum voltage rating
- Corrosion-resistant Tin-Plated Brass terminals (#10-32 screw) for secure connections
Specifications
| Product Specifications | |
|---|---|
| Brand | Blue Sea Systems |
| Model | 7443 |
| Amperage Rating | 20A DC |
| Actuator Style | Flat Rocker |
| Poles | 1 |
| Max Voltage | 80V DC |
| Circuit Breaker Type | Magnetic Hydraulic - Trip Free |
| Interrupt Capacity | 10000A |
| Terminal Type | #10-32 Screw Tin-Plated Brass |
Who This Is For
Marine vessel owners and technicians requiring certified circuit protection for government, commercial, or US military applications. Essential for users adhering to stringent CFR 46 regulations or requiring the highest level of safety and reliability.
How It Compares
| Feature | Blue Sea 7443 20A DC Circuit Breaker | Blue Sea Systems 7441 UL |
|---|---|---|
| Amperage | 20A DC | 15A DC |
| Actuator Style | Flat Rocker | Flat Rocker |
| Poles | 1 | 1 |
| Maximum Voltage | 80V DC | 80V DC |
| Circuit Breaker Type | Magnetic Hydraulic - Trip Free | Magnetic Hydraulic - Trip Free |
| Interrupt Capacity | 10000A | 10000A |
Common Concerns Answered
Why is UL-489 certification important for this circuit breaker?
UL-489 certification signifies that the circuit breaker has undergone rigorous testing and meets stringent safety and performance standards specifically for marine applications, particularly for government and commercial vessels where compliance is mandated by regulations like CFR 46.
The cost is higher than non-certified breakers; is it worth the investment?
Yes, for vessels requiring regulatory compliance or where the highest level of safety and reliability is non-negotiable, the UL-489 certification and superior interrupt capacity of this breaker justify the investment by preventing potential catastrophic failures and ensuring adherence to maritime law.
I need a specific amperage rating not listed; can I get it?
While Blue Sea Systems offers a range of UL-489 breakers, specific amperage ratings can experience limited availability due to high demand. It is recommended to check inventory or consider the closest available compliant rating for your application.
Frequently Asked Questions
What is the interrupt capacity of the Blue Sea 7443 circuit breaker?
The Blue Sea 7443 circuit breaker has an interrupt capacity of 10,000A.
What type of actuator does the Blue Sea 7443 circuit breaker have?
The Blue Sea 7443 circuit breaker features a Flat Rocker actuator.
What is the maximum DC voltage rating for the Blue Sea 7443 circuit breaker?
The maximum DC voltage rating for the Blue Sea 7443 circuit breaker is 80V DC.
What are the terminal types on the Blue Sea 7443 circuit breaker?
The Blue Sea 7443 circuit breaker utilizes #10-32 Screw Tin-Plated Brass terminals.
Why is the 'Trip Free' feature important in this circuit breaker?
The 'Trip Free' mechanism on this magnetic hydraulic circuit breaker ensures that the breaker cannot be manually held in the ON position if a fault condition is present, thereby preventing damage to the circuit and enhancing safety.
