ETI KZS-2M differential circuit breaker C 13A/30 mA type A 10kA (2173223)

This ETI KZS-2M differential circuit breaker is designed to protect electrical lines against overload, short circuit, and residual current in low-voltage distribution systems. It combines the functions of a miniature circuit breaker and a residual current protective device in one modular housing, which makes it suitable for installation in distribution boards in residential, commercial, and other single-phase applications where both overcurrent and earth-leakage protection are required. The device is built in a 1P+N configuration, meaning it is intended for a single-phase circuit with a neutral conductor. Its rated current is 13 A, so it is used for branch circuits with moderate load demand. The C tripping characteristic indicates suitability for circuits with temporary inrush currents, for example lines supplying equipment that draws a short старт-up current during switching on. The residual current rating of 0.03 A provides protection in the event of dangerous leakage currents, supporting personal safety and helping reduce the risk of insulation faults. Type A sensing means the breaker responds not only to sinusoidal alternating residual current, but also to pulsating direct residual current. This is especially relevant in modern household and office installations where electronic power supplies, rectifiers, and other non-linear loads are common. With a breaking capacity of 10 kA, the unit is intended for systems where prospective short-circuit currents may be elevated, giving the installer a broader range of application in protected final circuits. The breaker is rated for operation at 50/60 Hz and accepts conductors with a cross-section from 1 mm² to 25 mm², which supports connection with widely used cable sizes during panel assembly. Compliance with IEC/EN 61009 confirms that the product belongs to the category of differential circuit breakers and meets the standard requirements for this type of protective device. In practice, the KZS-2M series is used to protect individual consumer groups in apartment, house, and small commercial electrical panels. Its modular form factor allows it to be integrated into standard DIN-rail equipment layouts, providing combined protection in a compact installation solution.