Overcurrent breaker S 311 1P C 25 A 10000 A DX3 series 409116

Reliable protection for electrical installations – Legrand S 311 circuit breaker

This single-pole circuit breaker from the DX3 series is a critical component ensuring safety in every electrical installation. Designed with both professional installers and end users in mind, it provides effective protection against overloads and short circuits. Manufactured by the renowned company Legrand, it guarantees high quality and reliable operation.

Functionality and technical specifications

The S 311 breaker features a rated current of 25 A and a rated voltage of 230 V AC. Its C characteristic ensures delayed tripping, which is especially important for loads with high inrush currents, such as motors or transformers. The rated short-circuit breaking capacity reaches up to 10 kA (in accordance with EN 60898) and 16 kA (in accordance with IEC 60947-2), ensuring effective protection even during severe faults. With a width of just 1 module, it enables efficient use of space in the distribution board.

Installation is simple and intuitive—the breaker is designed for mounting on a TH35 rail. It accepts single-core conductor cross-sections from 1.5 to 35 mm² and multi-core conductors from 1.5 to 25 mm², offering great flexibility during installation. Operation across a wide ambient temperature range (-25°C to +70°C) makes it suitable for use in diverse environmental conditions. The IP20 protection rating ensures protection against accidental contact.

User comfort and additional features

The S 311 breaker supports expansion with additional accessories from the DX3 series, such as auxiliary contacts or trip units, allowing customization to meet specific installation requirements. Compatibility with the HX3 Optimal Power Distribution system up to 125 A simplifies integration with other components of the electrical infrastructure. The black operating lever facilitates visual identification of the breaker’s status. Additionally, Class 3 energy limitation ensures appropriate protection in the event of an electric arc.