ETI KZS-2M differential circuit breaker B 6/0.3A type AC 10kA (2173301)

The ETI KZS-2M is a differential circuit breaker designed for protection of electrical circuits against overload, short circuit, and leakage currents. It is used in distribution boards of residential, commercial, and general household electrical systems where both overcurrent protection and residual-current protection are required in one device. With a 1+N pole configuration, it is intended for single-phase circuits with phase and neutral connection. The device is rated at 6 A, which makes it suitable for low-load lines, including lighting circuits and separate consumer groups. Tripping characteristic B indicates use in circuits with relatively low inrush currents. This makes the breaker appropriate for applications where the current rise during startup is limited. The rated residual current is 0.3 A, so the unit disconnects the circuit when leakage current exceeds the specified threshold, helping protect the electrical installation from dangerous fault conditions. The AC type means the device responds to alternating residual current. Its breaking capacity of 10 kA allows use in installations where high short-circuit currents may occur, provided this matches the project requirements. The rated frequency is 50/60 Hz, so the breaker can operate in electrical networks using either of these common supply frequencies. The permitted conductor cross-section ranges from 1 to 25 mm², which simplifies connection of different cable types within the declared limits. The product complies with IEC/EN 61009, the standard that defines requirements for differential circuit breakers. In practice, this makes the KZS-2M a functional protective element for individual lines in switchboard assemblies, combining circuit protection and residual-current monitoring in a single modular device.