Overcurrent circuit breaker, 3P, K characteristic, 4A, 25kA, AC | S303P-K4 2CDS383001R0337

Electrical installation protection with ABB S303P-K4 circuit breaker

This three-pole ABB S303P-K4 circuit breaker, with a rated current of 4A and K characteristic, provides reliable protection for your electrical installation. Designed for both domestic and industrial applications, it offers effective protection against overloads and short circuits. The K characteristic makes it ideal for circuits with high inrush currents – such as those with motors or transformers.

This circuit breaker features a high short-circuit breaking capacity of 25kA at 400V (according to EN 60898) and up to 100kA at 400V (according to IEC 60947-2), guaranteeing safety in the event of serious disturbances. Installation is quick and easy thanks to its standard width of 3 modules.

Solid construction and technical parameters

The circuit breaker is made of high-quality materials, ensuring its durability and reliability. Suitable for operation at temperatures from 0 to 70°C, and in environments with a pollution degree of 3, it will perform well in various conditions. The ability to use conductors with a cross-section from 0.75 mm² to 25 mm² (stranded) or from 0.75 mm² to 35 mm² (solid) provides flexibility during installation. The rated insulation voltage Ui is 500V, and the rated impulse withstand voltage Uimp is as high as 6kV – this confirms a high level of safety.

Using ABB S303P-K4 circuit breakers guarantees the safe and stable operation of the electrical installation. The possibility of additional accessories allows the circuit breaker to be adapted to the specific needs of a given facility. The IP20 degree of protection provides protection against accidental contact.