ETI KZS-1M UNI differential circuit breaker B 25A/0.03A type AC 6kA (universal connection) (2176126)

ETI KZS-1M UNI differential circuit breaker is designed to provide combined protection of electrical circuits against overload, short circuit, and residual current leakage. It is used in distribution boards of residential, commercial, and household electrical installations where it is necessary to combine overcurrent protection with protection of people against electric shock in case of insulation damage or leakage to earth. This model is made in a 1+N configuration, meaning it has one protected pole and a neutral connection. The rated current is 25 A, while the residual current rating is 0.03 A, which makes the device suitable for personal protection in general-purpose circuits. The B tripping characteristic indicates use in circuits with relatively low inrush currents, such as lighting circuits and standard socket circuits. Type AC means the device responds to sinusoidal alternating residual current. The breaking capacity of 6 kA allows the breaker to operate in networks where substantial short-circuit currents may occur within its rated limits. The rated frequency is 50/60 Hz, so the device is suitable for electrical systems operating at either frequency. Compliance with EN/IEC 61009-1 confirms that it meets the requirements applicable to differential circuit breakers. The universal connection design simplifies installation and makes the device convenient for integration into standard modular distribution boards. The rated conductor cross-section of 110 mm² reflects the terminal construction and should be considered when selecting and connecting conductors according to the project requirements. Thanks to the combination of overcurrent protection and residual current protection, this device is well suited for organizing safe outgoing circuits in internal electrical networks.