ETI KZS-2M Differential circuit breaker 2P 20A B type AC 10kA (2173105)

The ETI KZS-2M differential circuit breaker is designed to protect low-voltage circuits against overload, short circuit, and residual current. It combines the functions of an automatic circuit breaker and a residual current device in a single modular housing, which makes it suitable for installation in distribution boards used in homes, apartments, offices, and small commercial facilities. With its 1+N pole configuration, the device disconnects the phase conductor together with the neutral, which is important for safe operation of single-phase lines. The rated current of 20 A places this device in the range for circuits with moderate load, such as lighting circuits, socket outlets, and individual electrical consumers. The B tripping characteristic is intended for circuits without significant inrush currents, so it is commonly used for standard household and general-purpose installations. The residual current rating of 0.03 A provides protection against dangerous leakage currents and helps reduce the risk of electric shock. Type AC means the device reacts to sinusoidal alternating residual currents, which corresponds to many traditional electrical loads. A breaking capacity of 10 kA allows the breaker to operate in networks where high short-circuit currents may occur, ensuring disconnection of the affected circuit under fault conditions. The rated frequency of 50/60 Hz makes the device compatible with both widely used supply frequencies. The permitted conductor cross-section range of 1 to 25 mm² supports flexible connection of conductors according to the installation project. The device complies with IEC/EN 61009, the standard for residual current operated circuit breakers with overcurrent protection. This standard confirms that the product is intended for combined protection and switching in modular electrical installations. Overall, the ETI KZS-2M is a practical solution where space in the panel is limited and where both overcurrent and leakage-current protection are required on a single outgoing line.