Over‑current circuit breaker S 302 2P C 25 A 6000 A series DX3 407802

Protection of installations and equipment – Legrand DX³ series S 302 circuit breaker

This two‑pole circuit breaker from the DX³ series by Legrand is a reliable component that protects electrical installations against the effects of overloads and short circuits. Rated for 400 V and a nominal current of 25 A, it provides effective protection in electrical circuits. The C‑characteristic makes it ideal for safeguarding circuits with devices that draw high inrush currents during start‑up, e.g., motors or transformers – it allows a temporary overload without unnecessary tripping.

Design and installation – installer‑friendly ergonomics

The S 302 breaker features a compact design, occupying only 2 modules on a DIN rail. Installation is simple and intuitive, further aided by slide‑out separating inserts integrated into the housing. Spring clamps enable quick and secure connection of conductors ranging from 1.5 mm² to 35 mm², saving time during installation. Additional spring clamps for control and signaling circuits increase the device’s functionality.

Breaking capacity and safety

This breaker has a high short‑circuit breaking capacity of 6 kA at 400 V (per EN 60898) and up to 10 kA at 400 V and 25 kA at 230 V (per IEC 60947‑2). This means that in the event of a fault, the breaker will quickly and effectively disconnect the circuit, minimizing the risk of damage to the installation and equipment. The rated insulation voltage Ui is 500 V, and the rated impulse voltage Uimp is 4 kV, ensuring strong surge resistance. Energy‑limiting class 3 provides adequate protection against electric arcs. The IP20 protection rating guards against finger contact and solid objects larger than 12.5 mm.