ETI KZS-1M UNI differential circuit breaker 1P+N 16A/30mA B AC 6kA (2176124)

The ETI KZS-1M UNI differential circuit breaker is designed for protection of final electrical circuits against overload, short circuit, and leakage currents. It combines overcurrent protection and residual current protection in one modular device, which makes it suitable for distribution boards in residential, administrative, and small commercial installations. The 1P+N configuration means that the phase conductor and neutral are switched together, which is practical for single-phase networks. With a rated current of 16 A, the device is intended for lighting circuits and socket circuits with moderate load. The B tripping characteristic indicates fast response to overcurrent in circuits with low inrush currents, so it is commonly used for standard household consumers without significant starting surges. The residual current rating of 0.03 A, or 30 mA, provides protection against electric shock and is typically used for end circuits where an additional level of personal safety is required. The AC type refers to sensitivity to sinusoidal alternating residual current. This makes the breaker suitable for circuits with conventional loads where residual current is of the standard AC form. The breaking capacity of 6 kA allows the device to interrupt fault currents in installations with the corresponding short-circuit level. Rated frequency of 50/60 Hz ensures compatibility with both common network frequencies. The product complies with EN/IEC 61009-1, the standard for residual current operated circuit-breakers with integral overcurrent protection. The rated conductor cross-section of 110 mm² specifies the permissible terminal connection range within the device design. Overall, this ETI KZS-1M UNI model is a compact modular solution for circuit protection where both overload and leakage-current safety are required in a single device.