Overcurrent circuit breaker S 301N 1P+N B 20 6000 A series DX3 407476

Reliable protection for electrical installations

The S 301N 1P+N B 20 circuit breaker is a member of the DX3 series, designed to protect electrical circuits against overloads and short circuits. Its compact design (just 1 module wide) enables efficient use of space in the distribution board. This is an ideal solution for both residential and commercial installations, where reliability and safety are paramount.

Functionality and technical specifications

This single-pole plus neutral (1P+N) breaker with a rated current of 20A features a Type B characteristic, making it particularly well-suited for protecting circuits with high inrush current loads—such as motors or transformers. The rated short-circuit breaking capacity (Icn) is 6 kA at 230 V, while the ultimate short-circuit breaking capacity (Icu) complies with IEC 60947-2 and is 10 kA, ensuring effective protection against sudden voltage surges. Installation is performed on a DIN rail, and the ability to connect conductors with cross-sections from 0.75 mm² to 16 mm² (single-core) or from 0.75 mm² to 10 mm² (multi-core) provides installation flexibility.

Installation and operational comfort

The S 301N breaker stands out for its high build quality and thoughtful design. The IP20 protection rating ensures safe operation under standard environmental conditions. Optional accessories allow customization to meet specific installation requirements. Integrated contact position indicators simplify diagnostics and status monitoring, while compatibility with Legrand accessories enables the creation of comprehensive protection systems. Operation across a wide ambient temperature range (-25°C to +70°C) ensures reliable performance in diverse operating conditions.