This section provides overview, applications, and principles of mica capacitors. Also, please take a look at the list of 7 mica capacitor manufacturers and their company rankings.
Mica capacitor use a natural mineral ceramic called mica as the dielectric. These capacitors have very high heat resistance and good temperature characteristics.
The mica is made up of thin layers, which are peeled off one by one. Compared to other capacitors, the processing is more complex and expensive because the layers of mica are easily broken.
Although the share of ceramic capacitors has been decreasing recently due to their improved properties, they continue to be preferred for audio-related applications.
Mica capacitors were popularly used in vacuum tube amplifiers and power conditioners, especially in the 1970s and 1980s. The sound quality unique to mica capacitors has attracted attention, and some models are installed in high-end audio amplifiers.
It was used in almost all electronic equipment, such as radio communication equipment and electronic calculators, around the time of World War II. It was also used in TVs, radios, etc. However, due to its high cost, it has since been replaced by inexpensive capacitors in more recent years.
Mica is a natural mineral which is used as a dielectric in mica capacitors. Mica is a silicate mineral with heat resistance and insulation properties, and its thin film form makes it suitable for dielectrics. Since it is made from a mineral, it maintains stable characteristics even at high temperatures and has good high-frequency features.
There are two main types of mica capacitors: the stacked type (in which tin or other metal foil and mica are alternately placed on the electrodes), or, where the silver paste is printed on mica and layered on top of each other. The silver-plated type has better characteristics because it is heat-compression bonded and is more widely distributed.
Mica includes white mica and biotite, and its form and color vary slightly depending on the composition of the raw materials.
Therefore, its quality and composition vary slightly depending on its origin and the part used.
Because it is a naturally occurring mineral, it is more complicated than other capacitors to maintain stable quality.
In addition, carefully peeling off the thin layer of mica requires human hands, which requires skill and is expensive.
*Including some distributors, etc.
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