Ceramic Dielectric Types

A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the dielectric it is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes the composition of the ceramic material defines the electrical behavior and therefore applications.

Ceramic dielectric types.

Ceramic dielectrics are broadly classified into class i class ii and class iii dielectrics. Moreover the capacitance is rather large due to ceramic dielectric and amounts to a few hundred pf. Some of the most commonly used ceramic dielectric materials include c0g np0 u2j x7r x5r z5u and y5v. The advantage of this type of trimming capacitor is that it is light in weight and small in size and can be therefore mounted directly in the wiring of the set.

Solid dielectrics are paper mica ceramic and glass etc. The letter number letter naming system used for class ii class iii dielectrics specifies the temperature characteristics of a dielectric material. A ceramic capacitor uses a ceramic material as the dielectric. Two types of ceramic capacitors are widely used in modern electronics.

Ceramic dielectric types ceramic capacitor can utilise a whole host of different dielectrics unlike other capacitor types including tantalum capacitors and electrolytic capacitors. X7r is by far the most common class ii dielectric in use today but x5r and high temperature x8r x8l types are also common. Multilayer ceramic mlcc and ceramic disc as shown in fig. They are solids liquids and gases.

8 5a and b 6 8 ceramic capacitors typically have small capacitances between 1 nf and 1 μf and a low maximum rated voltage compared with electrolytic capacitors and are nonpolarized. These different dielectrics give the capacitors very different properties so apart from choosing that a ceramic capacitor is to be used a second decision about the specific type of dielectric may also be needed. C0g is the most common class i dielectric material while x7r z5u and y5v are the most common class ii type dielectrics. They are also available in multiple dielectric types each of which describes how the rated capacitance changes over temperature.