Differential circuit breaker ETI KZS-2M C 25/0.03 A type AC 10kA (2173126)

The ETI KZS-2M differential automatic circuit breaker is intended for protecting electrical circuits against overload, short circuit, and leakage currents. It is used in distribution boards for residential, commercial, and small industrial installations where one device needs to combine the functions of an automatic circuit breaker and residual current protection in a single housing. This makes it suitable for protecting individual outgoing lines and groups of consumers where electrical safety and compact panel layout are important. The device has a 1P+N configuration, meaning one protected pole and a neutral conductor. Its rated current is 25 A, which allows it to be applied in circuits with moderate load. The C tripping characteristic indicates suitability for circuits with increased inrush currents, such as lines supplying appliances with motors or other equipment with brief starting peaks. The rated residual current of 0.03 A provides disconnection when dangerous leakage current appears, helping to improve protection in socket circuits, lighting circuits, and supply lines for household equipment. This model uses AC type residual current sensing, so it responds to sinusoidal alternating leakage current. The breaking capacity of 10 kA allows the device to be used in networks where higher short-circuit currents may occur. The rated frequency of 50/60 Hz supports compatibility with commonly used electrical systems. The permitted conductor cross-section range of 1–25 mm² simplifies installation in panel assemblies and makes it possible to connect different types of wiring within the same protection circuit. The product complies with IEC/EN 61009, the standard governing differential circuit breakers. With overload, short-circuit, and leakage-current protection combined in one modular device, the ETI KZS-2M is a practical choice for installations where coordinated circuit protection and straightforward panel integration are required.