ETI KZS-1M UNI differential circuit breaker B 16 A 0.01 A type A 6 kA universal connection (2176004)

The ETI KZS-1M UNI differential circuit breaker is designed to protect electrical circuits against overload, short circuit, and leakage currents. It combines the functions of a miniature circuit breaker and a residual current device in one compact module, making it suitable for distribution boards in residential, commercial, and household installations. The 1+N configuration is intended for single-phase networks with a neutral conductor, providing control of both the live line and the neutral path. This model is rated at 16 A, which makes it appropriate for the protection of lighting circuits, socket circuits, and other loads of a similar level. The B tripping characteristic indicates operation in circuits with moderate inrush currents, where fast disconnection is required under fault conditions. The residual current sensitivity of 0.01 A provides high sensitivity to small leakage currents, which is especially important in areas where enhanced protection against electric shock and insulation faults is required. Type A means the device responds to alternating residual current and pulsating direct residual current. This expands its application in circuits supplying electronic equipment, appliances with rectifiers, and loads with switched-mode power supplies. The breaking capacity of 6 kA allows the breaker to be used in networks with the corresponding short-circuit current level, while the rated frequency of 50/60 Hz ensures compatibility with common AC power systems. The device complies with EN/IEC 61009-1, the standard governing residual current circuit breakers with overcurrent protection. The rated conductor cross-section of 110 mm² indicates the acceptable connection size within the construction limits of the device. The universal connection design supports flexible installation in modular switchboards and simplifies integration into distribution assemblies where compact layout and combined protection are required. Overall, the KZS-1M UNI series by ETI is intended for circuit-level protection where overcurrent protection and residual current protection need to be implemented in a single device. It is used to safeguard individual lines in panel installations and supports reliable operation in standard low-voltage electrical systems.