Hager NRN NRN Circuit Breaker, 4-Pole, 25 A, Type C, 415 V ac AC, 25 kA Breaking Capacity

The Hager Miniature circuit breakers protect and control the circuits against overloads and short circuits. They also allow to isolate circuits. The circuit breaker is a four pole (4P) electrical protection device designed to safeguard four-phase circuits from overloads and short circuits. It has a 25kA breaking capacity, meaning it can safely interrupt fault currents up to 25,000 amps without being damaged. The C-25A rating indicates that the breaker trips when the current exceeds 25 amps, with the C curve providing protection for circuits with moderate inrush currents, such as those found in industrial equipment, motors, or large machinery. The 4m likely refers to the installation configuration or physical length of the breaker.

IEC 60947-2 standard