Circuit breaker 25kA, In=20A, characteristic D. 1-pole. AZ-D20 174489

Overcurrent circuit breaker – reliable protection for electrical installations

This single-pole overcurrent circuit breaker with D characteristic is a key element ensuring safety in every electrical installation. Designed to protect circuits against overloads and short circuits, it offers high reliability and durability, especially in applications requiring resistance to surge currents. The rated short-circuit breaking capacity of 25kA guarantees an effective response in emergency situations, minimizing the risk of damage and fires.

Features and application

The AZ-D20 circuit breaker with a rated current of 20A is characterized by a D characteristic, which means delayed tripping. This makes it ideal for protecting circuits with receivers generating high inrush currents – such as motors, transformers or power supplies. This avoids unnecessary tripping of the circuit breaker during normal operation of these devices. The IP20 degree of protection provides protection against accidental contact, and the compact dimensions (width of 1.5 modules) facilitate mounting in electrical switchboards.

• High short-circuit breaking capacity: 25kA at 230V and 400V – ensures effective protection even in the event of serious failures.
• D characteristic: Delayed tripping ideal for devices with high inrush currents (motors, transformers).
• Compliance with standards: Energy limitation class 3 and surge category 3 confirm compliance with applicable safety standards.
• Versatility: Suitable for protecting various circuits in residential, commercial and industrial buildings.
• Expandability: Compatible with additional auxiliary accessories, allowing you to adapt the functionality to individual needs.
• Solid construction: Made of high-quality materials ensuring durability and reliable operation for a long time.

Installation and technical parameters

Installation of this circuit breaker is simple and intuitive, and its compact size allows for easy placement in standard switchboards. The rated voltage of 230V and the insulation voltage Ui of 440V guarantee safe operation in typical electrical installations. The rated impulse withstand voltage Uimp of 4kV provides resistance to transient overvoltages. The circuit breaker has a pollution degree of 2, which means it is intended for environments with a moderate level of pollution. Additionally, railway approvals confirm its high quality and reliability in demanding industrial applications.