Overcurrent circuit breaker 25kA 3-pole. Characteristic B, series AZ-3-B100 174513

Overcurrent circuit breaker – reliable protection for electrical installations

This three-pole overcurrent circuit breaker with B characteristic is a key element ensuring safety in every electrical installation. Designed to protect circuits against overload and short circuit, it effectively protects both devices and the installation itself. The rated short-circuit breaking capacity of 25kA guarantees a quick and effective response in emergency situations.

Characteristics and application

The AZ-3-B100 series circuit breaker with a rated current of 100A is ideal for securing circuits with high power demand. The B characteristic 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 generating surge currents. Mounting in the distribution box is done on a DIN rail, occupying 4.5 modules in width. The IP20 degree of protection provides protection against accidental contact, but does not protect against the effects of water.

Key advantages and features

• High short-circuit breaking capacity: 25kA at 400V ensures effective protection even in the event of serious failures.
• B characteristic: Provides a quick response to short circuits, while allowing for trouble-free starting of devices with motors.
• Three-pole design: Protects all phase conductors, providing comprehensive circuit protection.
• DIN rail mounting: Facilitates and speeds up installation in the distribution box.
• Compliance with standards: Meets the requirements of IEC 60947-2 and EN 60898, guaranteeing safety and reliability.
• Energy limitation class 3: Indicates high resistance to short-circuit energy, which translates to a longer device life.
• Rated voltage 400V: Suitable for standard power grids.
• Overvoltage category III: Suitable for installation in residential and industrial buildings with a medium level of exposure to overvoltages.

This circuit breaker is not only a protective element, but also an investment in the long-term and safe operation of the entire electrical installation. Its solid construction and compliance with applicable standards make it a reliable choice for both professional installers and end users.