Ceramic capacitor introduction

Production principle:

Extruded into a round tube, disc or disc with a high dielectric constant ceramic capacitor

It is made of a medium and is plated with silver on a ceramic by an infiltration method. It is divided into two types: 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. Low-frequency ceramic capacitors are limited to bypass or DC-blocking in circuits with lower operating frequencies, or where stability and loss are not critical. Such capacitors are not suitable for use in pulse circuits because they are susceptible to breakdown by pulse voltages.

Basic classification:

Ceramic capacitors can be divided into plug-ins and patches according to the package! According to different media, it can be divided into Class I ceramic capacitors and Class II ceramic capacitors. Usually NP0, SL0, COG is Class I ceramic dielectric capacitors, X7R, X5R, Y5U, Y5V are Class II ceramic dielectric capacitors, Class I ceramic dielectric capacitors. The capacity stability is very good, basically does not change with changes in temperature, voltage, time, etc., but the general capacity is very small, and the capacity stability of the class II ceramic dielectric capacitor is very poor, with a large change in temperature, voltage, time, so Generally used in places where capacity stability is not high, such as filtering! Advantages: stable, good insulation, high pressure resistance; disadvantages: small capacity.

Basic use:

High-voltage ceramic capacitors used in high-power and high-voltage fields are required to have small size, high withstand voltage and good frequency characteristics. With the advancement of materials, electrodes and manufacturing technology, the development of high-voltage ceramic capacitors has made great progress and has been widely used. High-voltage ceramic capacitors have become one of the indispensable components of high-power 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.