Residual current circuit breaker P 314 4P C 25 A 300 mA Type A, DX3 series 411241

Protection and safety in one device

The P 314 4P C 25 A 300 mA Type A residual current circuit breaker from the DX³ series is a comprehensive solution for protecting electrical installations. It combines the functions of an overcurrent and residual current device, providing protection against the effects of overloads, short circuits, and electric shocks. This is an ideal solution for both professional installers and end users who value safety and reliability.

Functionality and design

This four-pole (4P) circuit breaker with a rated current of 25 A features a C characteristic, meaning it responds more slowly to short-term current surges—ideal for circuits with devices exhibiting high inrush currents, such as motors. The Type A sensitivity ensures protection against earth leakage currents, while the rated residual current of 300 mA enhances operational safety. The short-circuit breaking capacity of 6 kA (compliant with EN 61009-1 standard) guarantees effective protection in the event of a short circuit. Additionally, the lockout mechanism prevents accidental re-energizing after tripping.

Installation and compatibility

The P 314 DX³ breaker has a width of 4 modules and a mounting depth of 44 mm, facilitating easy installation in standard distribution boards. It is designed for use in systems with a rated voltage of 400 V and a frequency of 50 Hz. The device features an IP20 protection rating, providing protection against finger contact and solid objects larger than 12.5 mm in diameter. It is equipped with a test button to verify the functionality of the residual current device. Importantly, it is compatible with the HX³ Optimal Power Distribution System up to 125 A and a wide range of auxiliary equipment—including auxiliary contacts, signaling devices, and undervoltage trip units.

Application and standards

The P 310 series DX³ breakers are designed for protecting circuits in residential and commercial buildings. They comply with the requirements of IEC/EN 61009-1 and IEC/EN 61009 standards, confirming conformity with European safety regulations. A pollution degree of 2 indicates suitability for environments with moderate dust levels. Simultaneous disconnection of the neutral conductor further enhances safety in the event of a fault.