Detailed method for identifying ceramic capacitor specifications

Detailed method for identifying ceramic capacitor specifications
Specification 1: 1000V-6000V high frequency ceramic capacitor
High-frequency ceramic capacitors are generally used in circuits with higher stable oscillations, so their stability requirements are relatively high. For example, the common coupling capacitors and high-voltage bypasses will use high-frequency ceramic capacitors. . The main advantage is that it can withstand high temperatures and wear resistance. For example, high-voltage ceramic capacitors are used in TV receivers that are common in daily life.

Specification 2: Low frequency ceramic capacitor below 50V
Low-frequency ceramic capacitors are mainly used in some circuits with relatively low operating frequencies. In this type of loop, the stability of the capacitors 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 voltage.

Comparison of the difference between the two
The identification of different types of ceramic capacitors can be judged directly by capacitors or circuits. Generally speaking, it can withstand high voltage, has better insulation and is more reliable. It is a high-frequency ceramic capacitor used in high-voltage circuits. The low-frequency ceramic capacitors are relatively low in reliability and cost, and are often used in capacitors such as low-frequency circuits and coupling circuits.

Rapid identification method
Generally speaking, the capacitors used in the audio controller and the crossover are high-frequency ceramic capacitors, because their capacity is relatively large, and the use of metal plastic film can achieve better sound quality. Secondly, in the filter capacitor, the characteristics of its capacity determine the effect of using electrolytic capacitors, but in the process of use, it is necessary to pay attention to suppress the rising of high-frequency impedance.

Method for reading ceramic capacitors
The reading method of the ceramic capacitor is basically the same as the reading method of the resistance, and the separation color standard method, the numerical standard method and the direct standard method are three kinds. The basic unit usage of the ceramic capacitor is shown by (F), and other units are: millifarad (mF), microfarad (μF), nanofarad (nF), and picofarad (pF). Where: 1 Farad = 1000 millifarads (mF), 1 millifarad = 1000 microfarads (μF), 1 microfarad = 1000 nanofarads (nF), 1 nanofarad = 1000 picofarads (pF).

The capacity of the large-capacity ceramic capacitor is directly indicated on the capacitor, such as 10μF/16V;

The capacity of a small-capacity ceramic capacitor is represented by letters or numbers on the capacitor;

Letter notation: 2m=2000μF, 1P2=1.2PF, 2n=2000PF;

Digital notation: The three-digit representation is also called the digital representation of the capacitance. The first two digits of the three digits are the significant digits of the nominal capacity, and the third digit represents the number of zeros following the significant digit, all of which are in pF.

For example: 102 indicates a nominal capacity of 1000 pF.

211 indicates a nominal capacity of 210 pF.

214 indicates a nominal capacity of 21 x 10 (4) pF.

In this representation, there is a special case where when the third digit is represented by "9", the capacity is multiplied by 10 to the power of -1 to indicate the capacity. For example: 219 indicates a nominal capacity of 21x (10-1) pF = 2.2 pF.