Differential circuit breaker ETI KZS-2M 1P+N 20A C type AC 10kA (2173325)

The ETI KZS-2M differential circuit breaker is designed to protect electrical circuits against overload, short circuit, and leakage currents. It is used in distribution boards of residential, commercial, and auxiliary electrical networks where both overcurrent protection and residual-current disconnection are required in one modular device. Combining the functions of an automatic circuit breaker and a residual-current device helps reduce the number of installed modules and simplifies panel layout. This model is rated at 20 A and has a C tripping characteristic. Such parameters make it suitable for circuits with moderate inrush currents, including lines supplying equipment with electric motors or other loads that may briefly draw a higher current at start-up. The residual operating current is 0.3 A, which defines the level of protection against leakage currents in selected circuits. Type AC indicates operation in networks with sinusoidal alternating residual current. The device is configured as 1+N, meaning one protected pole plus a neutral conductor. Its breaking capacity of 10 kA allows use in systems where higher short-circuit currents may occur, which is an important parameter for modern distribution systems. The rated frequency of 50/60 Hz makes the breaker suitable for networks with either standard operating frequency. The connection range of 1 to 25 mm² allows termination of commonly used cable and conductor cross-sections. The differential circuit breaker complies with IEC/EN 61009, the standard governing this type of protective equipment. This makes it an appropriate solution for protecting individual consumer circuits in apartments, houses, offices, and smaller commercial facilities where combined protection against overcurrent and leakage current is needed in a single modular unit.