EATON AZ-3N-B63 Miniature Circuit Breaker 3P+N 63A B-Curve 25kA AC

The EATON AZ-3N-B63 is a professional-grade miniature circuit breaker engineered to provide robust protection for electrical circuits in demanding environments. This 3P+N device is specifically designed to handle a rated current of 63A, offering reliable performance in both industrial and commercial power distribution networks. With its B-type tripping characteristic and a high breaking capacity of 25kA, it effectively safeguards electrical installations against the risks of overloads and short circuits, ensuring consistent operational safety and system integrity.

Advantages

This circuit breaker stands out due to its high breaking capacity, which allows it to manage significant fault currents safely, thereby protecting downstream equipment from damage. The B-curve characteristic is optimized for applications where low-level short-circuit protection is required, making it highly versatile for various electrical setups. Its 3P+N configuration ensures that both phase and neutral conductors are managed, providing comprehensive disconnection capabilities. The device is built with high-quality materials that guarantee long-term durability and stability even under continuous load conditions, reducing the need for frequent maintenance.

Suitable for

• Industrial power distribution panels
• Commercial building electrical systems
• Protection of lighting and heating circuits
• General electrical infrastructure requiring high-capacity safety devices

This device may not be suitable for residential applications where a lower breaking capacity is sufficient and the physical dimensions of the unit might exceed standard consumer unit requirements. It is also not intended for DC power systems, as it is specifically engineered for AC electrical networks.

Key specifications

• Rated current: 63A
• Number of poles: 3P+N
• Tripping characteristic: B-curve
• Breaking capacity: 25kA
• Operating voltage type: AC

Installation should be performed by a qualified electrician in accordance with local electrical codes. The device is designed for mounting on a standard DIN rail within an appropriate distribution enclosure. Ensure that the supply cables are correctly sized for a 63A load and that all terminal connections are tightened to the manufacturer's specified torque to prevent overheating.

What to consider before purchase

• Verify that the 25kA breaking capacity meets the requirements of your specific installation site.
• Ensure the B-curve characteristic aligns with the startup current of your connected loads.
• Check the physical space available in your distribution board for a 3P+N device.
• Confirm compatibility with your existing AC power distribution system.

Usage recommendations: Regularly inspect the circuit breaker for signs of thermal stress or physical damage. It is recommended to perform periodic testing of the switching mechanism to ensure it remains functional over the lifespan of the installation.