Overcurrent circuit breaker S 314 4P C 40 A 10000 A series DX3 409340

Protection of installations and equipment – Legrand S 314 circuit breaker

This four-pole circuit breaker from Legrand’s DX³ series provides reliable protection for your electrical installation. Designed for AC circuits with a voltage of 400V, it effectively safeguards against the consequences of overloads and short circuits, ensuring safe operation and minimizing the risk of failures. With a rated current of 40A, it is an ideal solution for circuits with medium power demand.

Characteristics and applications

The S 314 breaker features a Type C characteristic, allowing for temporary current surges without unnecessary tripping. This is especially critical for devices with electric motors or other components generating high starting currents—such as pumps, compressors, or air conditioners. This prevents unplanned downtime and ensures continuous operation of connected loads. The rated short-circuit breaking capacity of 10kA at 400V and 16kA at 230V guarantees effective protection in the event of severe network disturbances.

Installation and compatibility

The breaker is designed for mounting on a TH35 rail, simplifying and accelerating installation. Its 4-module width enables efficient use of space in the distribution board. It supports connection of single-core cables with cross-sections from 1.5 mm² to 35 mm² and multi-core cables from 1.5 mm² to 25 mm², offering flexibility in cable selection. Additionally, it is compatible with the HX³ Optimal Power Distribution system, enabling the creation of a comprehensive and efficient electrical installation. The IP20 protection rating provides basic protection against contact and dirt ingress. Operating ambient temperature range: -25°C to 70°C, ensuring reliable performance under demanding environmental conditions.