Overcurrent breaker S 313 3P B 10 A 10000 A series DX3 408989

The S 313 3P B 10 A circuit breaker is a member of the DX³ series, designed to protect electrical installations against overloads and short circuits. The device features high reliability and easy installation, making it an excellent choice for both professional electricians and end users.

Characteristics and Application

This three-pole breaker with a B characteristic and a rated current of 10 A is ideal for circuits with moderate inrush currents. The B characteristic indicates rapid response to overcurrents while offering greater tolerance to brief current surges compared to C-characteristic breakers—this is critical when protecting circuits with motors or transformers. The rated voltage of 400 V and short-circuit breaking capacity of up to 16 kA at 230 V and 10 kA at 400 V ensure effective protection under typical operating conditions. The flush mounting option enhances installation aesthetics.

Construction and Specifications

The S 313 DX³ breaker has been designed with installer convenience in mind. It has a width of 3 modules, enabling efficient use of space in distribution boards. Screw terminals allow connection of single-core conductors from 1.5 mm² to 35 mm² and multi-core conductors from 1.5 mm² to 25 mm². The IP20 protection rating guards against accidental contact but does not protect against moisture—therefore, the device is intended for use in dry indoor environments. Operating ambient temperature ranges from -25°C to +70°C, ensuring reliable performance under diverse conditions. Additionally, the breaker features position indicators on the housing, facilitating easy identification of the device’s status.

Safety and Compliance with Standards

The breaker complies with EN 60898 and IEC 60947-2 standards, confirming its safety and reliability. The rated impulse withstand voltage (Uimp) reaches 4 kV, ensuring resistance to transient overvoltages. The energy limitation class is 3, indicating strong capability to suppress short-circuit energy. The device also carries conformity certifications in accordance with relevant European directives (certification details available in the technical documentation).