Overcurrent breaker S 311 1P B 25 A 10000 A DX3 series 408874

DX³ Series Circuit Breaker – Reliable Protection for Electrical Installations

The DX³ series S 311 1P B 25 A circuit breaker is designed to protect electrical circuits against overloads and short circuits. This device is suitable for both residential and commercial installations, offering high reliability and easy installation, making it a preferred choice for professional electricians and end users alike.

Functionality and Specifications

This breaker, rated at 25 A with a characteristic B curve, provides effective protection against sudden load surges. The B characteristic ensures rapid response to short circuits while tolerating brief overloads, such as those occurring during motor startup. The rated short-circuit breaking capacity is 10 kA at 230 V (compliant with EN 60898) and 16 kA at 230 V (compliant with IEC 60947-2), ensuring installation safety in the event of a fault. Its compact design—just one module wide—allows efficient use of space in distribution boards.

Installation and Additional Features

The breaker is mounted on a DIN TH35 rail, the standard in most distribution boards. It features screw terminals compatible with single-core conductors from 1.5 mm² to 35 mm² and multi-core conductors from 1.5 mm² to 25 mm². Optional accessories, such as auxiliary contacts, enable functional expansion and customization to meet specific installation requirements. The IP20 protection rating guards against finger contact but does not protect against water or dust—therefore, the device is intended for use in dry indoor environments. Operating ambient temperature range: -25°C to 70°C.