Description
Blue Sea 7445 50A UL-489 Circuit Breaker | Boat Supply Store
Engineered for applications demanding superior safety and reliability, this 50A DC circuit breaker meets stringent UL-489 specifications, essential for critical marine electrical systems where standard protection is insufficient. Its magnetic hydraulic, trip-free mechanism ensures consistent protection against overloads and short circuits across its 80V DC maximum voltage rating. Ideal for government vessels and commercial craft operating in harsh environments, this breaker provides robust safeguarding for vital onboard power distribution.
Key Features
- UL-489 Listed for critical marine applications
- 50A DC rating for robust power handling
- Flat Rocker actuator for easy operation
- 1-pole configuration for single-circuit protection
- 80V DC maximum voltage capacity
- Magnetic Hydraulic - Trip Free mechanism ensures reliable trip action
- #10-32 Screw Tin-Plated Brass terminals for secure connections
- 10000A interrupt capacity for superior fault protection
Specifications
| Product Specifications | |
|---|---|
| Brand | Blue Sea Systems |
| Model | 7445 |
| Amperage Rating | 50A DC |
| Voltage Rating | 80V DC |
| Poles | 1 |
| Actuator Style | Flat Rocker |
| Trip Mechanism | Magnetic Hydraulic - Trip Free |
| Terminal Type | #10-32 Screw Tin-Plated Brass |
| Interrupt Capacity | 10000A |
| Listing | UL-489 |
Who This Is For
Marine professionals and boat owners requiring robust, compliant circuit protection that meets stringent UL-489 specifications for government vessels and other regulated craft. This breaker is designed for critical applications where utmost reliability is paramount.
How It Compares
| Feature | Blue Sea 7445 50A UL-489 Circuit Breaker | Competitor |
|---|---|---|
| Amperage | 50A DC | 60A DC, 50A DC |
| Maximum Voltage | 80V DC | 80V DC, 28V DC |
| Circuit Breaker Type | Magnetic Hydraulic - Trip Free | Magnetic Hydraulic - Trip Free, Thermal |
| Interrupt Capacity | 10000A | 10000A, 2500A |
| UL-489 Listed | Yes | Yes, No |
Common Concerns Answered
Why are UL-489 specifications important for marine circuit breakers?
UL-489 listing signifies that the circuit breaker has undergone rigorous testing to meet demanding safety and performance standards specifically for critical AC and DC power circuits in marine environments. This ensures superior protection against overcurrents and short circuits, vital for preventing fires and equipment damage on vessels where electrical failures can have severe consequences.
Is the higher price of UL-489 breakers justified?
The increased cost of UL-489 listed breakers is directly attributable to the extensive testing, material quality, and design integrity required for certification. This translates to significantly enhanced reliability and safety, especially crucial for government vessels, commercial operations, and any critical system where failure is not an option, providing long-term value through dependable protection.
Could I be confused about whether I need UL-489 certification?
Understanding UL-489 requirements is key. It's mandated for critical applications, often specified by regulatory bodies like the US Coast Guard (CFR 46) or for government vessels. If your vessel operates commercially, is a larger vessel, or carries passengers, it's highly probable that UL-489 listed components are required for compliance and safety assurance.
Frequently Asked Questions
What is the interrupt capacity of the Blue Sea 7445 circuit breaker?
The Blue Sea 7445 circuit breaker has an interrupt capacity of 10000A, meaning it can safely interrupt a fault current of up to 10,000 amperes.
What type of actuator does the Blue Sea 7445 circuit breaker have?
The Blue Sea 7445 circuit breaker features a Flat Rocker actuator style, which is designed for straightforward and reliable operation.
What is the maximum voltage rating for the Blue Sea 7445 circuit breaker?
The maximum voltage rating for the Blue Sea 7445 circuit breaker is 80V DC, making it suitable for a wide range of DC marine electrical systems.
What terminal type is used on the Blue Sea 7445 circuit breaker?
The Blue Sea 7445 circuit breaker utilizes #10-32 Screw Tin-Plated Brass terminals, ensuring secure and corrosion-resistant electrical connections.
Why are UL-489 specifications important for marine circuit breakers?
UL-489 listing indicates that the circuit breaker meets stringent safety and performance standards for critical AC and DC power circuits in marine applications. This certification assures users of its reliability in preventing electrical fires and protecting vital equipment from overloads and short circuits, especially in demanding maritime conditions.
