Before getting knowledge about the types of capacitors, firstly, my dear reader, all you need to understand about a capacitor and how does it works. A capacitor or you can say that, an electronic capacitor is one of the most widely used electronic components. It is made by combining two metallic plates. Between these two plates, there will be the use of dielectric material so that an electric field can be easily generated by applying voltage over the plates. Both plates can be recognized on the basis of the charge they hold and charge can be positive or negative.
In present scenario, an electronic capacitor comes in several styles, forms, girths, length and material in order to perform efficiently as per the situation. Now one question still hit your brain that what does capacitors do. My dear friends, capacitors are commonly used for filtering. It means a capacitor will provide power to the microcontroller within the time duration of microseconds so that the microcontroller doesn’t reboot due to voltage drop. Detailed uses of capacitors are given below.
Small value capacitors are used
- as components in power supply systems so that the current flows smoothly
- as parts of electric filters as well as tuned circuits
- to bound signals amid stages of amplifiers
On the other hand, a large value capacitor is used
- as a part in several types of electric motors
- for storing energy in applications like strobe lights
- for correcting power factor in various types of AC power distribution systems
Types of Capacitors
There are several different types of capacitors and each type of capacitor has its own advantage as well as applications. Few major and widely used types of capacitors are listed below.
It is one of the most common types of capacitors generally used in almost every application right from audio to RF. The operating range of this type of capacitor is in between few picofarads to 0.1 microfarads. This type of capacitors are less costly as well as reliable as compared with other types of capacitors.
This type of capacitors are polarized. The best thing about electrolytic capacitors they are designed to provide high capacitance values. Along with this, Electrolytic Capacitors can be easily used in low frequency applications such as audio coupling & decoupling applications, power supplies etc.
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Silver Mica Capacitor
This type of capacitors are not in vogue but still able to offer accuracy, low loss and high level of stability. Generally, silver mica capacitors are used in such places where space is not an issue means they eat lot of space in installation. A silver mica capacitor is limited to maximum 1000 pF.
This type of capacitor is also known by several other names like supercap or ultracapacitor. Super-capacitors holds very large values of capacitance due to which these are generally used in big electrical components where requirement of capacitance is always high.
These capacitors are generally used in L/C circuits. The main characteristic of a variable capacitor is that its capacitance can be changed electronically or mechanically. A variable capacitor comes in several mechanical special forms. Few of them are multiple sections, split stator, differential and butterfly.
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Tantalum Electrolytic Capacitors
This type of capacitors are same as electrolytic capacitors and comes in both surface and leaded mount formats. Manufacturer of a Tantalum Electrolytic Capacitor design special circuit rules in order to execute it in safe environment.
Other types of capacitors Along with the above mentioned types of capacitors, there are several other types of capacitors are available in the market such as film capacitor, film power capacitors, glass capacitors, polypropylene capacitor, metallised polyester film capacitor poly-carbonate capacitor and aluminum electrolytic capacitors.
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