Power electronic circuit

Power electronic circuit (2) with at least one power semiconductor, whose control inputs are connected to a control device (6), and with a power supply (8) on the output side with terminals of the driving means (6) and the input side to a device (10) is connected to the pending a supply voltage, and wherein the power semiconductor is a self-conducting power semiconductor (4) is provided, characterized in that the device (10) comprises a switch (26) and a rectifier (28) having a DC-side auxiliary capacitor (C2), wherein the switch (26) the rectifier (28), the alternating voltage side to the supply network (18) and wherein the power supply (8) on the input side to the auxiliary capacitor (C2) is connected.