Circuit breaker 25kA, In=32A, characteristic B. 3-pole. AZ-3-B32 174508

Three-pole circuit breaker – reliable installation protection

This three-pole circuit breaker, with a rated current of 32A and B characteristic, is a key element of electrical protection in residential and commercial buildings. It provides effective protection against overload and short circuit, protecting both the electrical installation and the devices connected to it. The high short-circuit breaking capacity of 25kA guarantees safety even in the event of large voltage surges.

Design and application

The AZ-3-B32 circuit breaker has been designed for easy mounting on a TH35 rail. The compact dimensions (installation depth 75mm and width 4.5 modules) allow for optimal use of space in the distribution board. The B characteristic means that the circuit breaker reacts quickly to short circuits, but is more tolerant to short-term current surges during the starting of devices with a motor – which is particularly important for inductive loads. The rated insulation voltage Ui is 440V, and the rated impulse withstand voltage Uimp is 4kV, which confirms its high resistance to operating conditions.

Key features and benefits

• High short-circuit breaking capacity (25kA): Ensures reliable disconnection of the circuit in the event of a serious failure, minimizing the risk of damage and fire.
• B characteristic: Ideal for protecting circuits with receivers with high starting current (e.g. motors, transformers). Allows you to avoid unnecessary tripping of the circuit breaker during normal operation of devices.
• Three-pole design: Provides complete protection for three-phase electrical circuits.
• Expandability: Compatibility with additional accessories allows you to adapt the functionality of the circuit breaker to the specific needs of the installation.
• Compliance with standards: Meets the requirements of IEC 60947-2 and EN 60898 standards, guaranteeing safety and reliability of operation.
• Overvoltage category III and pollution degree 2: Enables operation in difficult environmental conditions occurring in industrial installations and public buildings.
• Energy limitation class 3: Provides adequate protection against the effects of electric arc occurring during a short circuit.

This circuit breaker is a solid solution for both professional installers looking for a reliable component for building safe electrical installations, and for end-users who care about the safety of their home or company.