Residual current circuit breaker with overcurrent protection 4P 6kA B 20A/30mA Type A ADM420C

Safety and reliability in your electrical installation

Residual current circuit breaker with overcurrent protection is a key element of every modern electrical installation, providing protection for people and equipment against the effects of short circuits and leakage currents. The 4P model with a rated current of 20A and a sensitivity of 30mA, characterized by class A, is a versatile solution for both professionals and end users. The rated short-circuit breaking capacity of 6kA guarantees an effective response in emergency situations, minimizing the risk of damage.

Functionality and technical parameters

This four-pole circuit breaker (4P) combines the functions of an overcurrent circuit breaker (characteristic B) and a residual current device type A. This means that it protects the circuit both against overloads and short circuits, and against dangerous leakage currents to earth. Characteristic B provides a quick response to sudden current increases, but at the same time allows for short-term overloads, which is particularly important when connecting devices with motors or other elements generating surge currents. A sensitivity of 30mA provides protection against electric shock. The circuit breaker has a rated current of 20A, a rated voltage of 400V and occupies 4 modules in width.

Installation and application

The circuit breaker is designed for mounting on a TH35 rail. Its compact dimensions (71 mm wide, occupying 4 modules) allow for easy adaptation to existing switchboards. The cross-section of the connected solid wire up to 25 mm² and stranded wire up to 16 mm² provides flexibility when connecting different types of wires. The locking mechanism prevents accidental opening of the circuit breaker during operation. The possibility of flush mounting further increases its versatility. The circuit breaker is used in lighting circuits, electrical sockets and when powering electrical devices requiring protection against electric shock. It meets the requirements of IEC 60898-1 and IEC 61009-1 standards, which guarantees its safety and reliability. Operating temperature from -25°C to +40°C allows its use in various environmental conditions.