Residual current circuit breaker P 312 2P B 6 A 30 mA Type A 10 kA DX3 series 411285

Multi-functional protection for electrical installations

This Legrand DX³ series residual current circuit breaker (RCCB) combines the functions of an overcurrent and residual current device, providing comprehensive protection for electrical circuits. It safeguards against the effects of short circuits, overloads, and electric shocks. This solution is ideal for both professionals and end-users seeking reliable and efficient installation protection.

Design and application

The P 312 2P B 6 A 30 mA type A breaker is designed for use in AC circuits with a rated voltage of 230 V. Its two-pole construction provides protection for both live conductors. The B characteristic ensures rapid response to short-circuit currents while remaining tolerant to brief current surges—particularly important when connecting devices with electric motors or other components generating high inrush currents. Type A indicates that the device detects both alternating sinusoidal residual currents and pulsating direct residual currents, significantly expanding the scope of protection.

Key features and benefits

• Multi-functionality: Integration of overcurrent and residual current protection in a single device saves space in the distribution board and simplifies installation.
• Short-circuit breaking capacity: Rated short-circuit breaking capacity of 10 kA ensures effective disconnection in the event of a serious fault.
• Compatible with various conductors: Supports single-core conductors from 0.75 to 16 mm² and multi-core conductors from 0.75 to 10 mm², offering installation flexibility.
• Quick diagnostics: Equipped with a test button for easy verification of the residual current device’s proper operation.
• User safety: Features a lockout mechanism preventing accidental re-energizing after tripping due to protection activation.
• Easy installation: Mounts securely on a TH35 DIN rail via snap-in fasteners for rapid and reliable setup.
• Compatibility: Works with the HX³ Optimal Power Distribution System up to 125 A and a wide range of accessories (auxiliary contacts, trip units).
• High reliability: Constructed from high-quality materials and compliant with EN 61009-1 and VDE 0664-20 standards, ensuring long-term, fault-free operation.

Thanks to its compact dimensions (4 modules wide) and intuitive status indication (color-coded lever), this breaker is easy to operate and diagnose. The B characteristic ensures excellent performance under impulse loads, minimizing the risk of unnecessary tripping. IP20 protection rating guards against finger contact and ingress of solid objects larger than 12.5 mm.