EATON AZ-3N-D32 Miniature Circuit Breaker, 3P+N, 32A, 25kA, D-Curve

The EATON AZ-3N-D32 is a high-performance miniature circuit breaker engineered for demanding industrial and commercial electrical distribution systems. This 3P+N device is designed to provide robust protection for electrical circuits by effectively interrupting current flow in the event of short circuits or overloads. With its high breaking capacity and specialized tripping characteristics, it ensures the safety of connected equipment and maintains the integrity of the electrical infrastructure.

Advantages

This circuit breaker offers exceptional reliability due to its high 25kA breaking capacity, which allows it to handle significant fault currents common in industrial environments. The D-type tripping characteristic makes it particularly suitable for circuits with high inrush currents, such as those powering motors or large transformers, preventing nuisance tripping during startup. Its 3P+N configuration provides comprehensive protection for three-phase systems with a neutral conductor, ensuring balanced and secure operation across all phases.

Suitable for

• Industrial machinery and motor control centers
• Large commercial electrical distribution boards
• Systems with high inductive loads
• Installations requiring high short-circuit protection

When it may not be suitable

This device is not intended for standard residential lighting or small appliance circuits where a B or C-curve breaker would be more appropriate. Using a D-curve breaker in low-inrush applications may result in delayed protection during fault conditions.

Key specifications

• Rated current: 32A
• Number of poles: 3P+N
• Breaking capacity: 25kA
• Tripping characteristic: D-curve

How to use

The EATON AZ-3N-D32 should be installed by a qualified electrician within a compatible distribution board or enclosure. It is designed for DIN-rail mounting. Ensure that the supply cables are correctly sized for a 32A load and that all terminal connections are tightened to the manufacturer's specified torque to prevent overheating. Once installed, the toggle switch allows for manual operation to isolate the circuit when necessary.

What to consider before purchase

• Verify that the D-curve characteristic matches the startup current requirements of your connected equipment.
• Ensure the 25kA breaking capacity is sufficient for the prospective short-circuit current at the point of installation.
• Confirm that the physical dimensions and DIN-rail mounting space are available in your distribution panel.

Usage recommendations

Regularly inspect the circuit breaker for signs of thermal damage or loose connections. It is recommended to perform periodic functional checks to ensure the tripping mechanism remains responsive. Always adhere to local electrical codes and safety regulations during installation and maintenance.