The present invention relates an NPC switching device (10) for an X-ray system (86) with symmetric power supply, wherein the switching device is amended by extra damping resistors (13, 18) in the high voltage rails (24, 28). These resistors act as damping resistors. Thus, they may provide particular damping in combination with the load (100), which is capacitive dominated. Further, an additional inductor (77) may be provided at the output (48) of the NPC switching device allowing a resonant transition. In case the NPC switching device is connected with a grid capacitance of the X-ray system, comprising a cathode (90) and a grid (92), wherein the cathode and the grid form a grid capacitance, overshoot and settling time in the switching device may be controlled and reduced, in particular to a minimum.