Overcurrent breaker S 301 1P B 10 A 6000 A DX3 series 407430

Electrical Installation Protection with Legrand S 301 Circuit Breaker

This single-pole overcurrent breaker from Legrand’s DX3 series, rated at 10A with a Type B characteristic, provides reliable protection for your electrical installation. It effectively safeguards both equipment and wiring against overloads and short circuits. The Type B characteristic ensures rapid response to short-circuit currents while tolerating brief current surges during equipment startup—particularly important for motors and transformers.

The S 301 breaker is designed for operation in circuits with a rated voltage of 230V and frequency of 50–60Hz. Its compact dimensions (1 module width, 44mm depth) enable easy installation in distribution boards. The rated short-circuit breaking capacity (Icn) is 6kA at 230V, while the ultimate breaking capacity (Icu) according to IEC 60947-2 reaches up to 10kA—ensuring high performance in emergency situations. Constructed from high-quality materials, it is resistant to environmental conditions with an operating temperature range of -25°C to 70°C and an IP20 protection rating.

Installation and Applications

This breaker is ideal for both new installations and upgrades of existing systems. The option for flush mounting increases application flexibility. The compatible conductor cross-sections are 1.5 to 35 mm² for single-core cables and 1.5 to 25 mm² for multi-core cables, offering broad compatibility with various cable types. Additional accessories can be fitted to expand functionality. The rated impulse withstand voltage (Uimp) is 4kV, providing enhanced safety against sudden voltage surges. With a pollution degree of 2, the breaker performs reliably in environments with moderate dust levels.