Overcurrent circuit breaker Icn=10000A / Icu=15kA 1P C 25A NCN125

Overcurrent circuit breaker – reliable protection of electrical installations

This single-pole circuit breaker from Hager, with a rated current of 25A and C characteristic, is a key element in protecting electrical installations in residential and commercial buildings. It provides effective protection against overloads and short circuits, minimizing the risk of damage to equipment and fires. Its compact size – only 1 module wide – makes it easy to install in electrical distribution boards.

Functionality and technical parameters

The NCN125 circuit breaker is characterized by a high short-circuit breaking capacity of 10kA at 230V AC and as much as 15kA at 400V AC. The C characteristic makes it ideal for circuits with devices generating inrush currents, such as motors or transformers – it allows it to react more slowly to short current surges, while quickly activating in the event of an overload. The rated insulation voltage Ui is 500V, and the impulse withstand voltage Uimp is 6kV, which guarantees safety and reliability. Suitable for operation in a wide temperature range (from -25°C to 70°C), it will perform well in various environmental conditions.

• Thanks to the high short-circuit breaking capacity (10kA at 230V AC and 15kA at 400V AC), the circuit is effectively disconnected in the event of a failure.
• The C characteristic ensures optimal operation with inductive and capacitive loads, protecting against the effects of transient overvoltages.
• The possibility of flush mounting allows for aesthetic and discreet placement of the circuit breaker.
• The compact width (1 module) saves space in the distribution board.
• A wide range of wire cross-sections (solid 1-35 mm² and stranded 1-25 mm²) provides flexibility during installation.
• Energy limitation class 3 guarantees adequate protection against the effects of short circuits.

Application and compliance with standards

The NCN125 circuit breaker is used to protect lighting circuits, socket outlets and electrical devices with a power adapted to the rated current of 25A. It complies with IEC 60898-1 and IEC 60947-2 standards, which confirms its safety and quality. The IP20 degree of protection provides protection against accidental contact, but does not protect against the effects of water or dust – therefore, the circuit breaker should be mounted in a distribution board enclosure. Thanks to the possibility of additional equipment (e.g. mechanical locks), the functionality and safety of the installation can be increased.