LOW-VOLTAGE CIRCUIT BREAKER

The invention relates to a low-voltage circuit breaker, comprising: at least one current sensor for determining the magnitude of the electric current of a conductor of the low-voltage circuit breaker, which conductor is associated with the current sensor; at least one electromechanical switching unit for connecting and disconnecting at least two electrical contact points, at least one of which can be moved in such a way that in a first switching position of the movable contact point two contact points are connected to one another and in a second switching position the contact points in question are not connected to one another; at least one electronic switching unit having a semiconductor switching element, which electronic switching unit is electrically conductive in a first switching state and electrically blocking in a second switching state and is connected electrically in parallel with the electromechanical switching unit; an electronic tripping unit, which is connected to the current sensor, the electro