Overcurrent circuit breaker 25kA, In=40A, B characteristic. 3+N pole. AZ-3N-B40 174522

Overcurrent circuit breaker 3+N – reliable installation protection

This four-pole (3+N) overcurrent circuit breaker from Eaton's AZ series, with a rated current of 40A and B characteristic, is a key element ensuring safety in every electrical installation. The rated short-circuit breaking capacity of 25kA guarantees an effective response in the event of a failure, protecting circuits from overload and short circuit. The device is designed for mounting on a DIN rail and occupies 6 modules in width.

Functionality and technical parameters

The AZ-3N-B40 circuit breaker has been designed with demanding applications in mind. The B characteristic ensures fast tripping in the event of overloads, which is particularly important in circuits with receivers with high starting current – such as motors or transformers. The rated insulation voltage Ui is 440V, and the impulse voltage 4kV, which confirms its high resistance to working conditions in industrial and commercial installations. Energy limitation class 3 and surge category 3 further increase the level of safety.

• Thanks to the rated current of 40A, the circuit breaker is ideal for protecting typical electrical circuits.
• The B characteristic guarantees a quick response to overloads, making it suitable for protecting lighting and socket circuits.
• High short-circuit breaking capacity of 25kA at 400V provides effective protection against the effects of short circuits.
• Four-pole (3+N) design allows simultaneous protection of phases and neutral conductor.
• Compact dimensions – 6 modules wide – make it easy to install in switchboards with limited space.
• Protection class IP20 protects against finger contact and access of solid objects larger than 12.5 mm.
• Possibility of expansion through compatibility with Eaton auxiliary accessories allows you to adapt the functionality to specific user needs.

Application and compliance with standards

The AZ-3N-B40 circuit breaker is widely used in residential construction, commercial buildings and industry. It is approved for use in railway applications, which demonstrates its high reliability and compliance with strict safety standards. Compliance with IEC 60947-2 standards guarantees its proper operation and safety of use. The device is made of high-quality materials, which ensures long-lasting and trouble-free operation. Additionally, the possibility of expansion with Eaton accessories allows it to be adapted to the specific requirements of a given project.