The types and uses of ceramic capacitors (for details, please log in www.jyhjec.com)
Published on:2021-05-27
Ceramic capacitors are divided into high-frequency porcelain and low-frequency porcelain. Capacitors with small positive capacitance temperature coefficients are used in high-stability oscillation circuits as loop capacitors and pad capacitors. Low-frequency ceramic capacitors are limited to bypass or DC blocking in circuits with lower operating frequencies, or occasions where stability and loss are not high (including high frequency). Such capacitors are not suitable for use in pulse circuits because they are susceptible to breakdown by pulse voltage. Ceramic capacitors can be divided into plug-in and patch type according to different packages! According to the different media, it can be divided into Type I ceramic dielectric capacitors and Type II ceramic dielectric capacitors. Usually NP0, SL0, COG are Type I ceramic dielectric capacitors, X7R, X5R, Y5U, Y5V are Type II ceramic dielectric capacitors, and Type I ceramic dielectric capacitors. The capacity stability is very good, basically does not change with temperature, voltage, time, etc., but the general capacity is very small, and the II type ceramic capacitor capacity stability is very poor, with a large change in temperature, voltage, and time, so Ceramic capacitors are generally used in occasions that do not require high capacity stability, such as filtering!
High-voltage ceramic capacitors used in high-power and high-voltage fields are required to have the characteristics of small size, high withstand voltage and good frequency characteristics. In recent years, with the advancement of materials, electrodes and manufacturing technology, the development of high-voltage ceramic capacitors has made considerable progress and has been widely used. High-voltage ceramic capacitors have become one of the indispensable components of high-power and high-voltage electronic products. The use of high-voltage ceramic capacitors is mainly divided into power equipment for power transmission and distribution systems and equipment for processing pulse energy.