Overcurrent circuit breaker 25kA, In=20A, characteristic B. 3-pole. AZ-3-B20 174506

Three-pole circuit breaker – reliable installation protection

This three-pole circuit breaker from Eaton's AZ series, with a rated current of 20A and B characteristic, is a key element ensuring safety in every electrical installation. The rated short-circuit breaking capacity of 25kA guarantees effective protection against the effects of overloads and short circuits. The design adapted to work in AC networks (400V voltage) makes it a universal solution for a wide range of applications.

Features and application

The AZ-3-B20 circuit breaker is designed for reliable operation in demanding conditions. Characteristic B means that the circuit breaker reacts quickly to short circuits, but is more tolerant to short-term current surges, which is particularly important when connecting devices with electric motors or other loads with high starting current. The width of 4.5 modules allows for efficient use of space in the switchgear cabinet. The rated impulse withstand voltage of 4kV provides additional safety in the event of overvoltage.

• Versatile application: ideal for protecting lighting circuits, socket outlets and electrical appliances in residential, commercial and industrial buildings.
• High short-circuit breaking capacity: 25kA ensures effective protection of the installation and devices against damage in the event of a serious short circuit.
• Characteristic B: optimal for circuits with loads with high starting current, minimizes the risk of unnecessary tripping of the circuit breaker.
• Mounting on TH35 rail: standard mounting simplifies installation and replacement of the circuit breaker.
• Expandability: compatibility with additional accessories (e.g. auxiliary contacts, release units) allows you to adapt the functionality to individual needs.

Parameters and compliance with standards

The circuit breaker meets the requirements of IEC 60947-2 and EN 60898 standards, which confirms its high quality and safety of use. Energy limitation class 3 and surge category III provide adequate protection in installations exposed to interference. Protection degree IP20 protects against finger contact, which increases safety during operation. The cross-section of the connected solid or stranded wire from 2.5 mm² to 50 mm² provides flexibility when selecting supply wires. Ambient temperature in operating conditions from -25°C to +55°C enables operation in a wide temperature range.