Differential circuit breaker ETI KZS-2M 2P 20A C 0.03A type A 10kA (2173225)

The ETI KZS-2M differential circuit breaker is designed to protect electrical circuits against overload, short circuit, and leakage current. It is used in distribution boards of residential, commercial, and general-purpose electrical networks where combined protection in a single device is required. By integrating the functions of an automatic circuit breaker and a residual current device, it provides local protection for individual lighting circuits, socket groups, and connected loads that must be disconnected quickly in abnormal operating conditions. This model is rated at 20 A and has a C tripping characteristic, which makes it suitable for circuits with moderate inrush currents. The residual current sensitivity is 0.03 A, or 30 mA, so the device responds to dangerous leakage currents and helps protect people from electric shock. Type A residual current detection means the unit is intended to detect sinusoidal alternating residual current as well as pulsating direct residual current, which is relevant for many modern household and office appliances. The device is configured as 1+N, making it suitable for single-phase circuits with a neutral conductor. Its breaking capacity of 10 kA allows the line to be disconnected even under high short-circuit currents, which is important for use in distribution systems with elevated fault levels. The rated frequency is 50/60 Hz, so the breaker is compatible with standard mains frequencies used in electrical installations. The permissible conductor cross-section range is 1–25 mm², which simplifies connection in typical wiring applications and helps adapt the device to common installation practices. The product complies with IEC/EN 61009, the standard governing differential circuit breakers. This standard confirms that the device is intended for combined protection against overload, short circuit, and earth-leakage faults in modular switchboard assemblies. Thanks to its technical characteristics, the KZS-2M is a practical solution for protecting separate circuits in panel boards where both overcurrent protection and residual current protection are required. It is suitable for use in electrical installations that need compact modular protection with defined tripping parameters and a high breaking capacity.