A ceramic capacitor is a capacitor that uses ceramic materials as a medium, coats a metal film on the ceramic surface, and then sinters at a high temperature as an electrode. The classification of ceramic capacitors can be divided into high-frequency ceramic capacitors and low-frequency ceramic capacitors.

1. High-frequency ceramic capacitor

High-frequency ceramic capacitors are generally mainly used in circuits with higher stable oscillations, so their stability requirements are relatively high. For example, the more common coupling capacitors and high-voltage bypasses will choose high-frequency ceramic capacitors. . The main advantage is that it can withstand high temperatures and is relatively resistant to wear. For example, high-voltage ceramic capacitors are used on TV receivers that are common in daily life.

2. Low-frequency ceramic capacitor

Low-frequency ceramic capacitors are mainly used in circuits with relatively low operating frequencies. In this type of circuit, the requirements for the stability of the capacitor and the degree of loss are often not very high. Especially in some circuits with relatively strong pulses, low-frequency ceramic capacitors cannot be used, otherwise, it is likely to be directly broken down by the voltage.

Where to use a ceramic capacitor?


Ceramic capacitors are often used in audio and high-frequency electronic circuits. Common ceramic capacitors have a small capacity, generally ranging from a few pf to a few tenths of uF. It is essentially functionally indistinguishable from other types of capacitors. They are all direct-blocking. Circulating AC, but the high-frequency characteristics of ceramic capacitors are better, and generally play the role of coupling, filtering, decoupling, and oscillation in the circuit.



How to read ceramic capacitors？


The reading method of the ceramic capacitors is basically the same as the reading method of the resistor. The real capacitance value can be directly shown on the capacitor, and it can also be shown by digits and letters which represent their special meanings, or be shown in the form of digits representing their special meanings.