What to Know Before Buying a Capacitor

For your applications, it is vital to find the perfect capacitor. You should note that each capacitor is quite different in various aspects. For instance, a given type of capacitor can work quite well in certain circuits but cause serious problems in other circuits due to its suitability.

Film Capacitors

These types of capacitors have a lot of applications because they have dielectric properties. You can find them in nearly any voltage and value. They have a tolerance that ranges from 0.1% to 10%. Also, they are available in different case styles and shapes. The two main types include axial lead and radial lead. Their electrodes can be metalized with zinc or aluminum, and they can be applied on all sides of plastic film.

Film capacitors are also known as plastic capacitors due to the use of polystyrene, Teflon, or polycarbonate. The film sorts require a thicker dielectric film that lessens the danger of tears, and they are suited to bigger case sizes and lower capacitance values. These film capacitors are large and quite expensive and can be used in the AC voltage uses. Taking into account the dissipation and capacitance factor, they have a wide range of uses.


Ceramic Capacitors

These types of capacitors have applications in high-frequency circuits like RF to audio. Also, they are an ideal choice for the high compensation that is common in the audio circuits. Also, the capacitors are known as the disc capacitors. They are made by coating the two sides with a ceramic disc or small porcelain and stacked to create a capacitor. You can make high capacitance and low capacitance ceramic capacitors. In this case, you need to change the thickness of your ceramic.


electricalElectrolytic Capacitors

These capacitors are known to have a high tolerance capacity. You can find them with voltages ranging up to 500 V. You cannot get high capacitance value with high voltage because of the temperature. The main types include aluminum and tantalum.

Tantalum capacitors are known to offer higher value, better exhibition, and can extend to various parameters. Also, the fact that they have dielectric properties means that they offer easier current leakage and improved capacitance length. That makes them ideal for decoupling, obstructing, and even filtering applications. Also, the thickness of the film and breakdown voltage offers the capacitors elevated capacitance due to their size.


Variable Capacitor

This is a type of capacitor whose capacitance can repeatedly and intentionally change mechanically. It has applications in LC circuits. You can see it in operation in adjusting radio for the impedance matching.


Applications of Capacitors

You should note that capacitors have various applications in electronics and electrical systems. For instance, they can be used in energy storage gadgets, filter applications, signal processing systems, and motor starters.

The truth is that capacitors are important components of the electronic circuit. Without a capacitor, the circuit cannot be complete. For instance, they are used to smooth out ripples in AC power supply, decoupling signals, buffers, and coupling.