Overcurrent breaker S 303 3P B 16 A 6000 A DX3 series 407561

Reliable Protection for Electrical Installations – Legrand S 303 Overcurrent Breaker

This three-pole overcurrent breaker from the DX3 series, rated at 16A, is a critical component of any safe and efficient electrical installation. Designed for both residential and commercial applications, it provides effective protection against overloads and short circuits. The B characteristic makes it ideal for circuits with devices featuring moderate inrush currents, preventing unnecessary tripping.

The S 303 breaker stands out with its high breaking capacity: up to 6kA at 400V (compliant with EN 60898), 10kA at 400V, and 25kA at 230V (compliant with IEC 60947-2). This ensures stable operation even during significant voltage surges, guaranteeing not only user safety but also minimizing the risk of installation downtime.

• Versatile Installation: Supports flush mounting and accommodates a wide range of conductor cross-sections (1.5–35 mm² for single-core and 1.5–25 mm² for multi-core cables), simplifying installation across diverse systems.
• Compact Module Width: Occupies only 3 module widths, enabling efficient use of space in distribution boards.
• Durability and Reliability: Designed for operation in ambient temperatures ranging from -25°C to +70°C, with high immunity to interference (IP20 protection rating).
• Enhanced Safety: Rated impulse withstand voltage (Uimp) of up to 4kV, further increasing protection levels.

Legrand DX³ series breakers feature innovative solutions that simplify installer work: integrated pull-out separating inserts and additional spring-loaded terminals for control and signaling circuits significantly accelerate and streamline the installation process. The new terminal design ensures easy achievement of the correct tightening torque, while status indicators on the housing clearly show the actual contact position regardless of the lever position. Additionally, special holes allow locking of the switching lever using Colring cable ties, enhancing operational safety.