The role of parallel ceramic capacitors at the power switch

The ceramic capacitor is a capacitor made by extruding a high dielectric constant capacitor ceramic barium titanate titanate into a circular tube, a disk or a disk as a medium, and plating the silver on the ceramic as an electrode by a sintering method. Good characteristics, good insulation, high voltage resistance, etc., widely used in high-stability oscillation circuits, as a loop, bypass capacitor and pad capacitor. So everyone knows what is the role of parallel ceramic capacitors at the power switch? If you don't know it doesn't matter, the following small series will tell you about the role of this.

The parallel ceramic capacitor is a Y capacitor, the positive pole of the connected AC terminal and the negative pole of the DC terminal, mainly for protection, protecting the contacts of the power switch. When the switch is turned on, this capacitor is short-circuited. It is equivalent to no effect. When the power supply is turned off, the self-inductive current of the power transformer will generate an electric spark between the switch contacts.

The capacitor is equivalent to a bypass channel, and a part of the self-induced electromotive force is released through the capacitor instead of passing through the contact, so that the arc of the contact becomes smaller and the ablation is reduced, thereby protecting the switch and prolonging the life of the switch. . Looking at the above, do you know the role of the parallel ceramic capacitor at the power switch? If you have technical questions, please contact us and we will try our best to solve it for you.