Eaton FAZ-B4/2 Miniature Circuit Breaker, 2-Pole, B-Curve, 4A, 15kA

The Eaton FAZ-B4/2 is a high-performance 2-pole miniature circuit breaker engineered to provide reliable protection for electrical circuits in various environments. With a rated current of 4A and a B-curve tripping characteristic, this device is specifically designed to detect and interrupt overloads and short circuits efficiently. It features a robust breaking capacity of 15kA, making it a dependable component for modern electrical distribution systems.

Advantages

This miniature circuit breaker stands out due to its high breaking capacity, which ensures safety even in demanding electrical installations. The B-curve characteristic provides a precise response to overcurrents, protecting sensitive equipment from damage. Its 2-pole design allows for the simultaneous disconnection of both phase and neutral conductors, enhancing overall system safety and maintenance convenience. The compact construction facilitates easy integration into standard distribution boards.

Suitable for

• Residential electrical distribution boards
• Commercial building power systems
• Protection of lighting circuits
• Control circuits requiring low current ratings

When it may not be suitable

This circuit breaker is not intended for high-inrush current applications, such as large motor starting or heavy inductive loads, where a C or D curve characteristic would be required to prevent nuisance tripping. It is also not suitable for systems exceeding its 4A rated current capacity.

Key specifications

• Number of poles: 2
• Rated current: 4A
• Tripping characteristic: B-curve
• Breaking capacity: 15kA
• Mounting type: DIN rail

How to use

The device is designed for installation on a standard DIN rail within an electrical distribution enclosure. Ensure that the power supply is disconnected before installation. Secure the breaker firmly onto the rail and connect the supply and load cables to the appropriate terminals, ensuring that all connections are tightened to the manufacturer's specified torque. Once installed, the breaker can be switched on manually using the toggle lever.

What to consider before purchase

• Verify that the 4A current rating matches your circuit requirements.
• Ensure the B-curve characteristic is appropriate for your specific load type.
• Check the available space in your distribution board for a 2-pole module.
• Confirm that the 15kA breaking capacity meets the short-circuit current levels of your installation.

Usage recommendations

Regularly inspect the circuit breaker for any signs of physical damage or discoloration. It is recommended to test the mechanical operation of the toggle lever periodically to ensure smooth functionality. Always consult a qualified electrician for installation and maintenance to ensure compliance with local electrical safety regulations.