Circuit breaker size x250 4-pole 40kA 125A TM. Circuit breaker according to DIN EN 60947-2 size x250, with thermal (adjustable) and magnetic (adjustable) tripping to protect electrical systems and networks. Mounted on mounting plate. The three different operating states can be identified by the position of the knob (ON = top, OFF = bottom, tripped = middle position). The switches have a mechanical test button. The function of the circuit breaker can be expanded using various accessories. Including phase separators.