Differential circuit breaker ETI KZS-2M 1P+N 40A C type AC 10kA (2173128)

ETI KZS-2M differential circuit breaker is designed for combined protection of electrical circuits against overload, short circuit, and leakage current. It is used in distribution boards of residential, administrative, and commercial facilities where it is necessary to control both overcurrent and residual current in a single device. Such a solution is suitable for single-phase lines that require compact installation and coordinated circuit protection. The device is rated for a current of 40 A and features a C tripping characteristic, which makes it appropriate for circuits with increased inrush currents. The 1P+N pole configuration means that the breaker operates with one protected pole and a neutral conductor, which is a common arrangement for single-phase networks. The rated residual current of 0.03 A provides protection against electric shock and helps reduce the risk associated with current leakage in the installation. With a breaking capacity of 10 kA, this differential breaker can be applied in networks where higher short-circuit currents may occur. Type AC indicates response to sinusoidal alternating residual current, which corresponds to the operating conditions of many standard household and general-purpose power circuits. The rated frequency of 50/60 Hz allows use in electrical systems with either of these supply frequencies. The unit supports conductor cross-sections from 1 to 25 mm², which simplifies integration into different wiring schemes and distribution assemblies. Compliance with IEC/EN 61009 confirms that the product meets the requirements established for differential circuit breakers in terms of construction and operational performance. The KZS-2M series combines the functions of an automatic circuit breaker and a residual current device in one housing, helping save space in the panel while providing protection for a single single-phase circuit.