Circuit breaker 25kA, In=50A, B characteristic. 3+N pole. AZ-3N-B50 174523

Eaton AZ-3N-B50 circuit breaker – reliable protection for electrical installations.

The Eaton AZ series overcurrent circuit breaker is a solid and proven solution for protecting electrical circuits. Model AZ-3N-B50, with a rated current of 50A and B characteristic, provides effective protection against overloads and short circuits, minimizing the risk of damage and fire. It is a four-pole circuit breaker (3 protected poles + disconnectable neutral pole), which increases the functionality and safety of the installation.

This model is distinguished by its high short-circuit breaking capacity – up to 25kA at 400V, making it an ideal choice for demanding industrial applications and public buildings. The circuit breaker design is designed for easy mounting on a TH35 rail, and its compact dimensions (6 modules wide) allow for optimal use of space in the switchgear cabinet.

Functionality and technical parameters

The AZ-3N-B50 circuit breaker is characterized by its versatility and expandability. The ability to connect additional accessories allows it to be adapted to the specific needs of the installation. The rated insulation voltage Ui is 440V, and the impulse withstand voltage Uimp is 4kV, which guarantees safe operation in various conditions. Energy limitation class 3 provides high efficiency in limiting short-circuit energy, protecting the remaining elements of the installation.

• Thanks to the B characteristic, the circuit breaker reacts quickly to overloads, which is particularly important in circuits powering motors and other devices with high starting current.
• Short-circuit breaking capacity at 25kA level ensures effective disconnection of the circuit in the event of a short circuit, minimizing the risk of equipment damage.
• Disconnectable neutral pole increases safety and allows for complete disconnection of the circuit if necessary.
• Mounting on a TH35 rail is simple and quick, making installation easier in standard switchgear cabinets.
• Protection class IP20 protects against accidental contact with conductive parts.
• Withstanding surge category III and pollution degree II enables reliable operation in difficult environmental conditions.

Application and compliance with standards

The Eaton AZ-3N-B50 circuit breaker is used in a wide range of electrical installations, both in residential, industrial and public buildings. It is particularly recommended for protecting lighting circuits, socket circuits and receivers of a resistive or inductive nature (e.g. motors). It meets the requirements of IEC 60947-2 and has railway approvals (information from USP), which confirms its high quality and reliability. Thanks to this, you can be sure that your installation is safe and complies with applicable regulations.