A mechatronic plug-in connector system having a main contact and an auxiliary contact which lags during an unplugging operation and with a semiconductor electronic which is series-connected to the auxiliary contact and is parallel-connected to the main contact for extinguishing an arc produced during the unplugging operation, wherein the semiconductor electronic has two series-connected semiconductor switches and an energy accumulator which is connected to the semiconductor switches and which for charging taps the arc voltage produced between the semiconductor switches during the unplugging operation. The invention further relates to a multiple plug system having at least two plug-in connectors each having a main contact and a lagging auxiliary contact and with a semiconductor electronic which is common to the plug-in connectors and is series-connected to each of the auxiliary contacts via a diode.