EATON AZ-3N-D80 Miniature Circuit Breaker 3P+N 80A D-Curve 20kA

The EATON AZ-3N-D80 is a robust miniature circuit breaker engineered for demanding electrical distribution environments in industrial and commercial settings. This 3P+N device provides comprehensive protection for three-phase systems with a neutral conductor, ensuring high operational safety and reliability. With a rated current of 80A and a high breaking capacity of 20kA, it is built to handle significant electrical loads while effectively mitigating risks associated with short circuits and overloads.

Advantages

This circuit breaker stands out due to its high breaking capacity, which allows it to safely interrupt high fault currents common in industrial power distribution. The D-type tripping characteristic is specifically optimized for circuits with high inrush currents, such as those powering large motors or transformers, preventing nuisance tripping during startup. Its 3P+N configuration offers versatile installation options for complex electrical networks, providing a compact and efficient solution for modern power management.

Suitable for

• Industrial machinery and motor control centers
• Commercial building electrical distribution boards
• Systems with high inductive loads
• Applications requiring robust short-circuit protection

When it may not be suitable

This device is not intended for residential applications with standard lighting or small appliance circuits, as the D-curve tripping characteristic is too insensitive for such loads. It is also not suitable for DC electrical systems, as it is specifically designed for AC distribution.

Key specifications

• Rated current: 80A
• Number of poles: 3P+N
• Tripping characteristic: D-curve
• Breaking capacity: 20kA
• System type: AC

How to use

The EATON AZ-3N-D80 must be installed by a qualified electrician in accordance with local electrical regulations. It is designed for DIN-rail mounting within a distribution board or enclosure. Ensure that the supply cables are correctly sized for an 80A load and securely fastened to the terminals to prevent overheating. Once installed, the device can be manually switched on or off using the front-facing toggle lever.

What to consider before purchase

• Verify that the D-curve characteristic matches your load requirements
• Ensure the distribution board has sufficient space for a 3P+N module
• Confirm that the system voltage and frequency are compatible with the device
• Check that the 20kA breaking capacity meets the calculated short-circuit current of your installation

Usage recommendations

Regular inspection of the terminal connections and periodic testing of the switching mechanism are recommended to ensure long-term operational integrity and safety in industrial environments.