EATON AZ-3N-C40 Miniature Circuit Breaker 3P+N 40A 25kA Type C

The EATON AZ-3N-C40 is a robust miniature circuit breaker engineered to provide superior protection for electrical circuits in demanding environments. Featuring a 3P+N configuration, this device is specifically designed to handle three-phase power systems with a neutral connection, ensuring comprehensive monitoring and safety. With a rated current of 40A and a high breaking capacity of 25kA, it effectively manages significant fault currents, making it a reliable component for modern electrical infrastructure.

Advantages

This circuit breaker offers exceptional durability and performance consistency, which is essential for maintaining the integrity of industrial and commercial power grids. The C-type tripping characteristic provides a balanced response to overloads and short circuits, preventing nuisance tripping during normal motor start-ups or inductive load activation while ensuring rapid disconnection during genuine electrical faults. Its compact design allows for efficient space utilization in distribution boards, and the high breaking capacity ensures that the device can withstand severe electrical stress without compromising safety.

Suitable for

• Industrial power distribution systems
• Commercial building electrical installations
• Protection of three-phase motors and inductive loads
• Main distribution boards requiring high fault current protection

This device may not be suitable for residential applications where lower breaking capacities are sufficient and the physical dimensions or terminal capacities might be oversized for standard consumer units. It is also not intended for use in DC electrical systems, as it is specifically calibrated for AC installations.

Key specifications

• Rated current: 40A
• Number of poles: 3P+N
• Tripping characteristic: Type C
• Breaking capacity: 25kA
• System compatibility: AC electrical installations

Installation should be performed by a qualified electrician in accordance with local electrical codes. The device is designed for DIN-rail mounting within a standard distribution enclosure. Ensure that the supply voltage matches the device specifications and that all terminal connections are tightened to the manufacturer's recommended torque settings to prevent overheating.

What to consider before purchase

• Verify that the 40A rating matches your circuit load requirements
• Ensure the 25kA breaking capacity is appropriate for your installation's prospective short-circuit current
• Confirm that your distribution board has sufficient space for a 3P+N module
• Check that the C-type characteristic is suitable for the connected load type

Usage recommendations

Regular inspection of the circuit breaker and periodic testing of the installation are recommended to ensure long-term operational safety and reliability. Do not attempt to modify the internal mechanism of the device.