Circuit breaker 25kA, In=100A, characteristic B. 4-pole. AZ-4-B100 174539

Overcurrent circuit breaker – reliable protection for electrical installations

This four-pole overcurrent circuit breaker from Eaton's AZ series, with a rated current of 100A and B characteristic, is a key element ensuring safety in electrical installations. It provides effective protection against overloads and short circuits, protecting both devices and people. Its withstand current to short circuits up to 25kA guarantees reliable operation even in difficult conditions.

Features and application

The AZ-4-B100 circuit breaker is designed for use in three-phase circuits with a voltage of 400V. The B characteristic makes it ideal for protecting circuits with devices with high inrush current – e.g. motors or transformers. The rated short-circuit breaking capacity (Icu) is 20kA at 230V and 25kA at 400V, which confirms its high effectiveness. A width of 6 modules facilitates mounting in standard distribution boards. Protection class IP20 provides protection against accidental contact.

• Application: Ideal for securing lighting circuits, socket circuits and circuits powering household and industrial devices.
• Mounting: Designed for mounting on a DIN rail, which ensures quick and easy installation in the distribution board.
• B characteristic: Provides a quick response to overloads and short circuits, while allowing for short-term exceeding of the rated current without unnecessary tripping of the circuit – which is particularly important for devices with induction motors.
• Breaking capacity: High breaking capacity (25kA) guarantees safe disconnection of the circuit in the event of a serious failure.
• Railway approvals: It has railway approvals, which confirms its high quality and reliability.

Construction and parameters

The circuit breaker is made of high-quality materials, which guarantees its durability and reliability. It has energy limitation class 3 and pollution degree 2, which makes it suitable for operation in various environmental conditions. The possibility of using additional equipment (e.g. auxiliary contacts) allows for expanding the functionality of the circuit breaker and adapting it to individual installation needs. The rated impulse withstand voltage Uimp is 4kV, which ensures resistance to overvoltages. The width of the device is 6 modules, and the installation depth is 75mm.