Abstract: A miniature circuit-breaker includes at least one thermal trip element, which includes a force translator which causes switching contacts to open. The force translator may be a breaker mechanism. The thermal trip element works with a thermally sensitive element, in particular a bimetal trip element, which is in thermally conductive contact with a PTC (positive temperature coefficient) thermistor. The PTC thermistor is connected to a voltage allocated to properly heat the thermally sensitive element causing it to respond. In this manner, the voltage can be applied through remote tripping.