What are the types of capacitors? The electrician came here, did you know him?

A capacitor is an electronic component that can store electrical charge. It consists of two conductor plates (or metal foils) and an insulating material (or dielectric) between them. There are many types of capacitors. Below we will introduce some common types of capacitors and their characteristics.

1. Ceramic capacitor

Ceramic capacitor is a common capacitor whose dielectric material is ceramic. It has the advantages of small size, large capacity, high precision and good stability. Ceramic capacitors are widely used in filtering, coupling, and maintenance in electronic circuits.

2. Aluminum electrolytic capacitor

Aluminum electrolytic capacitor is a kind of polarized capacitor whose positive electrode is made of pure aluminum foil. Aluminum electrolytic capacitors have the advantages of large capacity, small size, long service life, and stable operation, so they are widely used in filtering, coupling, and maintenance in electronic circuits.

3. Electrolytic capacitor

An electrolytic capacitor is a capacitor composed of two metal foils, and its dielectric material is electrolyte. The advantages of electrolytic capacitors are large capacity, small size, and stable capacitance, but their polarity is obvious, so they can only be used in DC circuits, and the electrolyte inside the capacitor is easy to dry out and leak.

4. Organic electrolytic capacitor

The organic electrolytic capacitor is a new type of capacitor, and its dielectric material is an organic polymer material. The advantages of organic electrolytic capacitors are small size, large capacity, long service life, stable operation, good temperature stability, etc., and are widely used in high-frequency circuits.

5. Film capacitor

A film capacitor is a capacitor that uses metal foil and film as electrodes. Its advantages are high precision, good stability, and good frequency characteristics, so it is widely used in high-frequency circuits.

6. Metallized polyester film capacitor

Metallized polyester film capacitor is a capacitor that uses polyester film as the dielectric and metal foil or metal-coated film as the electrode. It has the advantages of small capacity, small size, and stable operation, and is widely used in electronic circuits.

7. Metallized polypropylene film capacitor

Metallized polypropylene film capacitor is a capacitor that uses polypropylene film as the dielectric and metal foil or metal-coated film as the electrode. Compared with metallized polyester film capacitors, metallized polypropylene film capacitors have higher capacitance and longer service life, and are less prone to damage and have a long service life.

8. Glass capacitor

A glass capacitor is a capacitor made of metal foil and glass as a dielectric. It is characterized by high precision, good stability, and small capacity, and is widely used in precision circuits.

9. Varactor diode

A varactor diode is a diode whose capacitance value can be changed. Its capacitance value can be achieved by changing the reverse voltage. It is widely used in radio tuning circuits, oscillation circuits, etc.

10. Piezoelectric capacitance

A piezoelectric capacitor is a component that uses the piezoelectric effect to realize capacitance. The advantages of piezoelectric capacitors are large capacity and high precision, and are widely used in mechanical vibration sensors, pressure sensors, etc.

In short, there are many types of capacitors, and different types of capacitors have different characteristics and application fields. When selecting a capacitor, it is necessary to select the appropriate type of capacitor according to specific usage requirements and application scenarios.