According to the switching circuit apparatus 2, the switching elements Q11 and Q12 operate complementarily. When the switching element Q11 is turned off and the switching element Q12 is turned on, a current flows in the order of: a positive electrode of the DC power supply E12→the diode D1→the capacitor→the switching element Q12→a negative electrode of the DC power supply E12, and thus, the capacitor C11 is charged. Therefore, before turning on the switching element Q11, the capacitor C11 keeps a sufficiently high voltage to operate the drive circuit DRV11.

FIG. 3 is a circuit diagram showing a configuration of a switching circuit apparatus 3 according to a second comparison example. The switching circuit apparatus 3 is provided with: switching elements Q21 to Q24, resistors R21 to R24, drive circuits DRV21 to DRV24, capacitors C21 and C22, diodes D21 and D22, DC power supplies E21 and E22, and terminals P21 and P22.

The terminal P21 is applied with a first voltage V1. The terminal P22 is applied with a second voltage V2 lower than the first voltage V1.

The switching elements Q21 to Q24 are connected in series between the terminals P21 and P22.