Overcurrent breaker S 304 4P B 63 A 6000 A series DX3 407630

Multi-pole protection from the DX³ series

The S 304 4P B 63A circuit breaker is a member of the DX³ series, designed for reliable protection of electrical installations. Its four-pole construction makes it ideal for safeguarding circuits requiring comprehensive protection against overloads and short circuits. The B characteristic ensures rapid response to sudden current surges while allowing for brief overloads that may occur during the startup of motors or other high-power devices.

Construction and application

This breaker, with a width of 4 modules, is designed for mounting on a TH35 rail. Its versatility is confirmed by the ability to connect both single-core cables (up to 35 mm²) and multi-core cables (up to 25 mm²). Designed to operate in temperatures ranging from -25°C to 70°C, it maintains reliability even under harsh conditions. The IP20 protection rating ensures protection against accidental contact. The rated short-circuit breaking capacity (Icn) is 6000 A at 400 V (compliant with IEC/EN 60898-1), while the ultimate short-circuit breaking capacity (Icu) reaches 10 kA at 400 V and 25 kA at 230 V (compliant with IEC/EN 60947-2), guaranteeing effective protection of the installation in the event of a fault.

Functionality and additional features

DX³ series breakers feature innovative solutions that simplify installation and operation. Integrated, retractable separating inserts and additional spring-loaded terminals for control and signaling circuits significantly streamline installation tasks. The ability to lock the switching lever using Colring cable ties enhances operational safety. Additionally, the breaker is compatible with the HX³ Optimal Power Distribution System, enabling expansion of the installation with additional functions. The option to equip it with auxiliary contacts, trip units, and residual current protection modules allows customization to meet specific installation requirements. Simultaneously, the disconnectable neutral pole provides enhanced safety and functionality.