Ceramic capacitors may be small in size, but they are capable of providing large charge storage. Used as electronic circuit capacitors, they do not have polarity markings and are therefore polarity-less. These capacitor workhorses are named so because their dielectric medium is a ceramic material. They also support electrostatic fields.
Ceramic capacitors are used in many applications. Some examples are induction furnaces, power circuit breakers, transmitter stations, high-density applications, high voltage laser power supplies, and printed circuit boards (PCBs). They are also utilized in minimizing RF (radio frequency) noise, which means they are ideal for DC-DC converters.
Since ceramic capacitors are non-polarized and can connect to the circuit from any side, they may also function as a general-purpose capacitor. They are of different capacitances, sizes, and voltage ratings. Those who are in robotics also find ceramic capacitors useful because, as already mentioned, they are capable of reducing RF noise.
Ceramic capacitors were initially created as a mica dielectric substitute back in the 1920s in Germany. Alternatively called disc capacitors, they are considered the most common and widely used, probably because of their flexibility in terms of types and compositions. Moreover, ceramic capacitors are suitable for numerous properties and applications.
There are two types of ceramic capacitors in terms of construction: Ceramic Disc Capacitor and MLCC or Multilayer Ceramic Capacitor.
The Ceramic Disc Capacitor is intended for electromagnetic interference suppression applications, functioning as safety capacitors. The ceramic disc is coated on each side, using silver contacts. They may also be made to acquire larger capacitances by using multiple layers.
The Multilayer Ceramic Capacitor is created using mixed & finely ground ferroelectric and paraelectric materials. It has more or less 500 layers. Commonly used for electronic equipment, the MLCC is also versatile as it comes in various shapes and styles.