3P 20A C residual current circuit breaker, 6kA, 230-400V EN61009

1) 3-in-1 protection for enhanced safety (overload, short-circuit and insulation fault)This 3P 20 A miniature RCBO combines in a single device the essential protection functions for an electrical outgoing circuit: protection against overloads, protection against short-circuits and residual current protection in the event of current leakage. In practice, this means it helps limit the heating of conductors and connections in the event of overcurrent, trips quickly in the event of a solid fault, and provides an additional level of safety against risks linked to insulation faults (for example on metal equipment, a damaged cable, or in a damp environment). It is a popular solution when renovating a consumer unit, bringing an installation into compliance or securing a dedicated circuit, as it allows protections to be centralised while maintaining simple readability and clear tripping in the event of a fault.2) 3P three-pole design: ideal for three-phase circuits and clean disconnection of several phasesThe three-pole (3P) structure is suited to three-phase installations or outgoing circuits requiring the simultaneous disconnection of several live conductors. Compared with a 1P or 2P model, a 3P is often preferred for small workshops, shops, certain technical equipment, or dedicated branches of a distribution board supplying three-phase loads. The benefit is twofold: disconnection is consistent across all the phases concerned, and maintenance as well as diagnostics are generally simpler, because the circuit is isolated more completely. For users looking for consistent protection on a three-phase outgoing circuit, the 3P format remains a common choice in installation practices in Europe.3) 20 A rating: a balanced choice for moderately loaded outgoing circuitsWith a rated current of 20 A, this RCBO is designed for medium-power circuits, depending on conductor cross-section, installation method, ambient temperature and the nature of the loads. The 20 A rating is often sought to supply a regular load without nuisance tripping, while remaining sufficiently sensitive to protect the line effectively in the event of an incident. It is suitable for dedicated circuits (extended lighting, small machines, sockets or specific equipment), while complying with installation sizing rules. For a reliable result, it is recommended to check the suitability of cable cross-section, length and protection in order to avoid overheating and ensure stable operation.4) C tripping curve and 6 kA breaking capacity: tolerance to inrush current and controlled disconnectionThe C curve is generally chosen when the circuit may present inrush currents at start-up (certain power supplies, slightly inductive loads, small motors, fans, pumps). It limits unnecessary tripping during brief peaks, while maintaining effective protection in the event of a genuine fault. The 6 kA breaking capacity provides a disconnection capacity suited to many commercial and residential applications. In the event of a short-circuit, the device is designed to interrupt the fault current within its specified range, in order to contain the incident and reduce potential damage to the installation and equipment. The combination of 20 A, C curve, 6 kA corresponds to a common combination for sub-distribution boards and standard outgoing circuits.5) Network compatibility and normative reference: AC 230-400 V, 50/60 Hz, compliant with EN 61009Designed for AC 230 to 400 V networks at 50/60 Hz, this model integrates into many low-voltage distribution configurations in Europe, whether for an advanced domestic consumer unit or a small-power distribution cabinet. The reference to the EN 61009 standard provides a benchmark for installers and users looking for a product compliant with the European requirements applicable to this family. For areas at increased risk (kitchen, utility room, basement, technical rooms, damp environment), the benefit of a device with residual current function is particularly relevant. As the residual current tripping threshold (for example 30 mA or 100 mA) is not indicated, it should be checked before purchase to ensure that it corresponds to the intended use and local installation practices (personal protection, fire protection, selectivity).