Structural elements according to the related art are composed of a carrying body in the case of which it is expensive to arrange a winding, and the filling between the poles is not optimal. Current is capable of flowing between the first electrode and the second electrode in a vertical direction of the silicon substrate. Second adjustment means serve to modify also the difference between the minimum power obtained during the simulated failure and the stabilized overall power, and also the time between said failure stabilizing on said overall power.