Description
Blue Sea 7457 20A UL-489 Circuit Breaker | Boat Supply Store
This Blue Sea Systems 7457 circuit breaker is engineered to provide uncompromising protection for critical marine electrical systems, specifically where stringent safety standards are mandated. It features a 20A AC amperage rating and a maximum voltage of 240V AC, ensuring robust performance in demanding environments. Its magnetic hydraulic, trip-free mechanism offers enhanced reliability compared to standard thermal breakers. This UL-489 listed component is indispensable for commercial vessels, government craft, or any application requiring adherence to CFR 46 regulations, offering superior safety and peace of mind on the water.
Key Features
- UL-489 Listed for critical marine applications and regulatory compliance.
- 20A AC Amperage rating provides substantial current protection.
- Flat Rocker actuator ensures positive engagement and clear status indication.
- 240V AC Maximum Voltage capability for diverse AC system integration.
- Magnetic Hydraulic - Trip Free operation prevents manual defeat of overload protection.
- #10-32 Screw Terminals with tin-plated brass ensure secure and corrosion-resistant connections.
- 5000A Interrupt Capacity safely handles fault currents, preventing damage.
- Single Pole (1 Pole) configuration for straightforward circuit isolation.
Specifications
| Product Specifications | |
|---|---|
| Brand | Blue Sea Systems |
| Model | 7457 |
| Amperage Rating | 20A AC |
| Actuator Style | Flat Rocker |
| Poles | 1 Pole |
| Maximum Voltage | 240V AC |
| Circuit Breaker Type | Magnetic Hydraulic - Trip Free |
| Terminal Type | #10-32 Screw Tin-Plated Brass |
| Interrupt Capacity | 5000A |
| Certification | UL-489 Listed |
Who This Is For
Marine professionals and vessel owners who require circuit protection that meets rigorous UL-489 standards for regulatory compliance, particularly those operating vessels for government agencies or commercial applications. This breaker is ideal for owners prioritizing the highest level of safety and reliability for critical electrical systems under demanding operational conditions.
How It Compares
| Feature | Blue Sea 7457 20A UL-489 Circuit Breaker | Blue Sea Systems 7455 UL |
|---|---|---|
| Amperage | 20A AC | 15A AC |
| UL-489 Listed | Yes | Yes |
| Interrupt Capacity | 5000A | 5000A |
| Actuator Style | Flat Rocker | Flat Rocker |
| Circuit Breaker Type | Magnetic Hydraulic - Trip Free | Magnetic Hydraulic - Trip Free |
Common Concerns Answered
Is the Blue Sea 7457 breaker difficult to install?
Installation is rated as Difficulty 2, requiring basic electrical knowledge. It involves disconnecting power, attaching wires to the #10-32 screw terminals, and securely mounting the unit. Proper wire gauge selection and correct terminal torque are critical for safe and reliable operation.
Why is the Blue Sea 7457 more expensive than other breakers?
The UL-489 listing signifies that this circuit breaker meets stringent safety and performance standards mandated for specific marine applications, particularly those under regulatory oversight like CFR 46. This certification ensures a higher level of reliability and fault current handling, justifying the premium over non-certified components.
Can I find this breaker readily available?
Due to the high demand for UL-489 certified components in regulatory-driven marine sectors, availability can occasionally be constrained. Sourcing from reputable marine supply stores ensures genuine products and proper inventory management.
Frequently Asked Questions
What is the amperage rating of the Blue Sea 7457 circuit breaker?
The Blue Sea 7457 circuit breaker has an amperage rating of 20A AC.
What type of actuator does the Blue Sea 7457 circuit breaker have?
The Blue Sea 7457 circuit breaker features a Flat Rocker actuator style.
What is the maximum voltage rating for the Blue Sea 7457 circuit breaker?
The maximum voltage rating for the Blue Sea 7457 circuit breaker is 240V AC.
What is the interrupt capacity of the Blue Sea 7457 circuit breaker?
The Blue Sea 7457 circuit breaker has an interrupt capacity of 5000A.
When is UL-489 certification required for marine circuit breakers?
UL-489 certification is typically required for marine circuit breakers used in applications governed by regulations such as CFR 46, which includes vessels operated by the Navy, Army, or Coast Guard, as well as commercial vessels and other applications demanding a higher standard of safety and reliability.
