Residual current circuit breaker P 312 2P B 20 A 30 mA type A 10 kA DX3 series 411289

Protection and Safety in One Device

This two-pole residual current circuit breaker P 312 from the DX3 series is a compact solution combining the functions of an overcurrent and residual current device. It provides comprehensive protection for electrical installations, safeguarding against the effects of overloads, short circuits, and electric shocks. Its rated current of 20A and sensitivity of 30mA (Type A) make it an ideal choice for protecting circuits in residential and commercial buildings.

Design and Application

The P 312 breaker features a width of 4 modules, enabling efficient space utilization in distribution boards. It is designed for operation in AC networks with a rated voltage of 230V and frequency of 50Hz. Thanks to its B characteristic, the breaker responds rapidly to current surges, ensuring effective protection for sensitive electronic equipment while also handling inrush loads such as motor startups. The rated short-circuit breaking capacity reaches up to 10kA, guaranteeing safety in the event of severe faults.

Functionality and Benefits for Installers and Users

The P 312 breaker not only delivers a high level of safety but also simplifies installation and diagnostics. It includes a test button for regular verification of the residual current mechanism’s proper operation. Additionally, the terminal lock prevents accidental loosening of conductors during operation. The ability to connect single-core cables from 0.75 mm² to 16 mm² or multi-core cables from 0.75 mm² to 10 mm² ensures flexibility in cable selection. Simultaneously, the disconnectable neutral pole enhances safety during maintenance and repairs. The device complies with IEC/EN 61009-1 standards, confirming its adherence to safety requirements. The IP20 protection rating ensures protection against finger contact and solid objects larger than 12.5 mm.