ETI KZS-1M UNI differential circuit breaker C 25A/0.01A type A 6kA universal connection (2176016)

ETI KZS-1M UNI is a differential circuit breaker intended for protection of electrical circuits against overload, short circuit, and residual current leakage. It is used in distribution boards of residential, administrative, and small commercial facilities where combined protection in a compact modular device is required. The 1+N pole configuration makes it suitable for single-phase networks with a neutral conductor, while the universal connection simplifies integration in switching cabinets and electrical panels. This model is rated at 25 A and has a C tripping characteristic, which is appropriate for circuits with moderate inrush currents. The residual current rating is 0.01 A, or 10 mA, providing a high level of protection against leakage currents. Type A indicates response to alternating residual current and pulsating direct residual current, which is important for circuits supplying modern electrical equipment that may generate such leakage components. These parameters make the device suitable for local line protection where both overcurrent and differential-current protection are needed in one unit. The breaking capacity is 6 kA, allowing the device to disconnect the circuit under short-circuit conditions within the specified limit. The rated frequency is 50/60 Hz, so the breaker can be used in networks operating at either common mains frequency. Compliance with EN/IEC 61009-1 confirms that the product is designed according to the requirements for differential circuit breakers and related protective functions. The stated nominal cross-section is 110 mm², which should be considered during selection and installation in panel equipment. Together with the universal connection and modular format, this makes the ETI KZS-1M UNI a practical solution for electricians and installers working on protection circuits in modern low-voltage systems. It combines overcurrent protection, short-circuit protection, and residual current protection in a single device for efficient use in distribution boards.