ETI KZS-2M differential circuit breaker 2P C 32A 0.01A type A 10kA (2173237)

The ETI KZS-2M series differential circuit breaker is intended for combined protection of electrical circuits against overload, short circuit, and leakage current. It is used in distribution boards for residential, commercial, and similar low-voltage installations where both overcurrent protection and residual-current protection are required in a single device. Such a solution is practical for single-phase circuits that need controlled disconnection of the phase conductor together with the neutral conductor. This model is rated for 32 A and uses tripping characteristic C, which makes it suitable for circuits with moderate inrush currents. In practice, it can be applied to lighting circuits, socket circuits, and individual loads where brief current peaks may occur during start-up. The 1+N pole configuration means the device switches the phase line and the neutral line, supporting safe operation in single-phase networks. The residual current sensitivity is 0.01 A, which provides high responsiveness to leakage currents and helps disconnect a faulty circuit at an early stage. This is especially important where protection against insulation faults and reduced touch-voltage risk is a priority. The type A residual-current response allows the device to react not only to sinusoidal alternating residual current, but also to pulsating direct residual current, making it suitable for circuits with electronic loads. A breaking capacity of 10 kA indicates suitability for installations with elevated prospective short-circuit currents. The rated frequency of 50/60 Hz allows use in systems operating at either of the common mains frequencies. The device supports conductor cross-sections from 1 mm² to 25 mm², which simplifies integration into switchboard wiring. Compliance with IEC/EN 61009 confirms that the product is designed according to the applicable standard for differential circuit breakers. Overall, the KZS-2M is a combined protective device for circuits where it is important to control overload, short circuit, and leakage current in one compact module arrangement.