Residual current circuit breaker with overcurrent protection KZS-2M A B20/0.03 002173205

Reliable protection for your electrical installation

This KZS-2M residual current circuit breaker with overcurrent protection is a comprehensive solution ensuring safety in your home or business. It protects against electric shock, short circuits and overloads, minimizing the risk of damage and fire. It is ideal for TN-S, TN-C-S, TT and IT networks where the neutral and earth conductors are separated.

Functionality and technical parameters

The circuit breaker combines the functions of an overcurrent and residual current device, allowing for effective protection against both overloads and leakage currents. A rated differential current of 0.03A (type A) ensures a quick response to dangerous leakage currents, and characteristic B guarantees appropriate selectivity and minimizes the risk of unnecessary tripping. The rated short-circuit breaking capacity is 10kA, confirming its reliability in emergency situations.

• Rated current: 20A – suitable for most standard household and industrial circuits.
• Type A: sensitive to AC and pulsating DC differential currents, providing comprehensive protection.
• Characteristic B: provides fast tripping in the event of a short circuit, but is less sensitive to short-term current surges when starting devices with a motor – this is important for installers!
• Width: 2 modules – saving space in the distribution board.
• Protection degree IP20: protection against contact with fingers and against solid objects larger than 12.5 mm.
• Connectable conductor cross-section: 1…25 mm² – flexibility in cable selection.

Ease of use and installation

The KZS-2M circuit breaker has been designed with the convenience of both installers and end-users in mind. It has a test button to allow regular checking of functionality and an indicator of contact position to facilitate identification of the device status. Secured connection terminals increase installation safety, and the ability to seal the lever prevents accidental adjustment of the circuit breaker. The compact design (installation depth 69 mm) makes installation easier even in tight distribution boards. The possibility of mounting auxiliary contacts PS KZS-2M/4M further expands the functionality of the device.