Views: 0 Author: Site Editor Publish Time: 2019-05-22 Origin: Site
Some friends have suggested that the withstand voltage indicated by the ceramic capacitor refers to the DC voltage. Is the capacitor useful for DC? Is the ceramic dielectric capacitor not a component that works in an AC circuit? This article is to explain the reasons for this issue, I hope that the content of this article can help everyone!
The ceramic dielectric capacitor is formed 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 fire infiltration method. It is divided into high frequency porcelain and low frequency porcelain. A capacitor with a small positive temperature coefficient of capacitance for use in a highly stable tank circuit as a loop capacitor and a pad capacitor.
1) The capacitor withstand voltage parameter generally refers to the large voltage that can be allowed under the limited leakage current parameter. In actual test, it is easier to measure with DC voltage. Because the capacitor itself can pass the alternating current, it will drown the leakage current;
2) The dielectric in the capacitor is generally able to withstand a lower voltage than the AC voltage under DC voltage. This involves the material characteristics, and it is reasonable to use the DC withstand voltage as the rated parameter.
Ceramic dielectric capacitors are used on DC, so everyone must be clear, don't get confused!
How to select the withstand voltage value of electric fan starting capacitor
What impact does the starting capacitor have on the crystal oscillator output frequency?
Knowledge related to monolithic capacitors, ceramic chip capacitors, and CBB capacitors
Consequences of capacitor rated voltage not matching the power supply voltage