Overcurrent breaker S 313 3P C 25 A 10000 A DX3 series 409256

Protection of Installation and User Safety

The S 313 3P C 25 A circuit breaker is a protective device designed to safeguard electrical circuits against overloads and short circuits. Suitable for use in AC installations with a rated voltage of 400 V, it ensures effective protection of equipment and wiring. Its C-characteristic design allows safe operation with loads generating short-duration inrush currents, such as motors or transformers. The rated short-circuit breaking capacity of 10 kA (at 400 V) and 16 kA (at 230 V) guarantees rapid response in the event of a fault.

Construction and Installation

This breaker occupies 3 modules on a DIN rail, facilitating seamless integration into existing electrical infrastructure. Surface-mount installation enhances the aesthetic appearance of the setup. Compatible with conductors ranging from 1.5 mm² to 35 mm² (single-core) and 1.5 mm² to 25 mm² (multi-core), it offers flexibility in cable selection. Screw-type terminals ensure secure and durable connections. Additionally, the breaker is compatible with the HX³ Optimal Power Distribution System, enabling expansion of the installation with additional functions.

Characteristics and Applications

The C-characteristic indicates a delayed response to short-term current surges, which is critical when connecting devices such as motors or transformers—preventing nuisance tripping during startup inrush currents. With a rated current of 25 A, it is ideal for protecting circuits with medium power consumption. The breaker complies with EN 60898 and IEC 60947-2 standards, confirming conformity with European safety regulations. Class 3 energy limitation ensures adequate protection against electric arcs. IP20 protection rating guards against accidental finger contact but does not provide protection against external elements such as water or dust—therefore, it is intended for indoor use in dry environments. Operating ambient temperature ranges from -25°C to +70°C, enabling reliable performance under diverse environmental conditions.