ETI KZS-2M Differential Circuit Breaker 2P 10/0.01 A Type A 10kA (2173232)

ETI KZS-2M is a differential circuit breaker designed to protect electrical circuits against overload, short circuit, and leakage currents. It combines the functions of an automatic circuit breaker and a residual current device in one enclosure, which makes it suitable for installation in distribution boards of residential, commercial, and small industrial facilities. Such a solution helps organize protection for individual outgoing lines while reducing the number of separate modular devices in the panel. The device is rated at 10 A and uses tripping characteristic C, so it is intended for circuits with moderate inrush currents. This makes it appropriate for protecting lighting lines, socket circuits, and other final circuits where brief current peaks may occur during startup. The rated residual current of 0.01 A provides sensitive protection against leakage currents and supports additional safety for people in case of insulation faults. This model has type A residual current detection, meaning it responds not only to sinusoidal alternating residual currents but also to pulsating direct components. That is an important feature for modern electrical loads that include electronic power supplies and other equipment with non-linear current characteristics. The 1+N pole configuration indicates use in single-phase circuits with a neutral conductor, which is a common arrangement in low-voltage installations. The breaking capacity of 10 kA allows the device to disconnect circuits under high short-circuit currents, which is especially relevant in installations with increased fault-current requirements. The rated frequency of 50/60 Hz makes the breaker suitable for networks operating on either standard frequency. Connection is designed for conductors with a cross-section from 1 to 25 mm², providing compatibility with widely used cable sizes in household and engineering applications. ETI KZS-2M complies with IEC/EN 61009, the standard governing differential circuit breakers. Overall, it is a practical protective device for final circuits where combined overcurrent and leakage-current protection is required in a single modular unit.