Circuit breaker 25kA, In=40A, characteristic D. 3-pole. AZ-3-D40 174518

AZ series circuit breakers – reliable installation protection

This three-pole circuit breaker with D characteristic provides effective protection of electrical circuits against overloads and short circuits. Designed for operation in AC networks with a voltage of 400V, it offers a rated current of 40A and a high short-circuit breaking capacity – up to 25kA. The construction based on the D characteristic makes it particularly resistant to sudden current surges, making it an ideal choice for protecting devices with high power consumption during start-up, such as motors or transformers.

This circuit breaker finds application in both building and industrial installations. Its compact dimensions (4.5 module width) facilitate mounting in switchboards, and the installation depth of 75 mm allows for flexible adaptation to different configurations. Compliance with IEC 60947-2 standards and a high energy limitation class (3) and overvoltage category (3) guarantee safety and reliable operation.

• High short-circuit breaking capacity: 25kA at 400V ensures effective protection of the installation even in the event of serious failures.
• D characteristic: Provides delayed tripping with short-term overloads, which helps avoid unnecessary tripping of circuits during the start-up of devices with motors or transformers.
• Versatile application: Suitable for protecting circuits in residential, commercial and industrial buildings.
• Expandability: Compatible with additional auxiliary accessories, allowing you to tailor functionality to individual needs.
• Solid construction: Made of high-quality materials, ensuring durability and reliable operation for a long time.
• Compliance with standards: Meets the requirements of IEC 60947-2 standards, confirming its safety and quality.

The circuit breaker has a protection degree of IP20, which means protection against contact with fingers and solid objects larger than 12.5 mm. The rated insulation voltage Ui is 440V and the rated impulse withstand voltage Uimp is 4kV. The pollution degree is 2, which means it is designed for environments with a normal level of pollution. Additionally, this circuit breaker has railway approvals, which confirms its high quality and reliability in demanding operating conditions.