Overcurrent circuit breaker 25kA, In=50A, characteristic D. 4-pole. AZ-4-D50 174545

Overcurrent circuit breaker – reliable protection for electrical installations

This four-pole overcurrent circuit breaker from Eaton's AZ series, with a rated current of 50A and D characteristic, is a key element ensuring safety in electrical installations. The short-circuit breaking capacity of 25kA guarantees effective protection against the effects of overloads and short circuits. Made of high-quality materials, this circuit breaker is designed to operate in demanding conditions, offering long-lasting and trouble-free operation.

Features and application

The AZ-4-D50 circuit breaker is used in three-phase installations where protection against overloads and short circuits with high surge current values is required. The D characteristic makes it ideal for circuits powering devices with high starting current, such as motors or transformers. The width of 6 modules facilitates mounting in standard distribution boards. IP20 protection degree provides protection against accidental contact.

• High breaking capacity: 25kA at 400V and 230V ensures effective protection even in the event of serious failures.
• D characteristic: Provides delayed tripping, allowing the starting of devices with high inrush current without unnecessary circuit disconnection.
• Four-pole design: Allows simultaneous disconnection of all phases and the neutral conductor, increasing safety during maintenance and repairs.
• Mounting on TH35 rail: Standard mounting simplifies integration with existing distribution boards.
• Compliance with standards: Meets the requirements of IEC 60947-2 standard, guaranteeing safety and reliability.
• Expandability: Compatible with additional auxiliary accessories, such as status indicators or auxiliary coils.

Technical parameters and construction

The circuit breaker has been designed with durability and reliability in mind. Its compact design (installation depth 75mm) allows for saving space in the distribution board. Energy limitation class 3 and surge voltage category 3 indicate high resistance to interference. Rated voltage 400V and rated impulse withstand voltage Uimp 4kV ensure safe operation in typical installation conditions. Pollution degree 2 indicates resistance to dust and moisture. The design is not explosion-proof, which means it is intended for use in non-hazardous environments.