The name of the chip capacitor, domestic and foreign manufacturers have this difference, but the parameters contained are the same. The name of the chip capacitor contains parameters:

1, the size of the chip capacitor: (0201, 0402, 0603, 0805, 1206, 1210, 1808, 1812, 2220, 2225)

2, the material of the chip capacitor: (NPO, X7R, Z5U, Y5V, COG, RH, SH)

3, the required accuracy:

Capacitance error table

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F

G

J

K

L

M

Allowable error

Plus or minus 1%

Plus or minus 2%

Plus or minus 5%

Plus or minus 10%

Plus or minus 15%

Plus or minus 20%

For example, a ceramic capacitor of 104J indicates that the capacity is 0.1 uF and the error is ±5%.

4, withstand voltage value: (4V, 6.3V, 10V, 16V, 25V, 50V, 100V, 250V, 500V, 1000V, 2000V, 3000V) 5, capacity: (0PF-47UF) 6, end requirements: (N indicates three layers of electrodes)

7, packaging requirements: (T means braided packaging, P means loose packaging)

Example: the name of Fenghua series chip capacitor: 0805CG102J500NT 0805: refers to the size of the chip capacitor, which is expressed in inches 08 indicates that the length is 0.08 inches (converted to mm=0.08*24.50=1.96mm),

05 indicates that the width is 0.05 inches (converted to mm=0.05*24.50=1.225ccm) CG: indicates the material required for the production of capacitors, 102 refers to the capacity of capacitors, the first two digits are significant numbers, and the following 2 indicates how many zeroes 102 = 10×102, that is, = 1000PFJ: It is required that the error accuracy of the capacity value of the capacitor is 5%, the dielectric material and the error accuracy are paired 500: it is required that the voltage withstand of the capacitor is 50V, and the first two digits of 500 are significant numbers, followed by how many zeros there are.

N: refers to the end material, now the general end refers to three layers of electrodes (silver/copper layer), nickel, tin T: refers to the packaging, T means braid packaging, B means plastic box loose packaging.

Types and characteristics of chip capacitors

Monolithic ceramic capacitors (commonly referred to as chip capacitors) are commonly used components with a relatively large amount at present, as far as the chip capacitors produced by AVX company are concerned, there are different specifications such as NPO, X7R, Z5U, Y5V, and different specifications have different uses. Below, we only introduce the commonly used NPO, X7R, Z5U and Y5V to their performance and application, and the ordering matters that should be paid attention to in procurement to attract everyone's attention.

Different companies may have different naming methods for the above capacitors with different performance. Here we refer to the naming method of AVX Company. For the products of other companies, please refer to the product manual of the company. The main difference between NPO, X7R, Z5U and Y5V is their different filling media. Under the same volume, the capacity of the capacitor composed of different filling media is different, and the resulting dielectric loss and capacity stability of the capacitor are also different. Therefore, when using capacitors, different capacitors should be selected according to the different roles of capacitors in the circuit.

1. NPO (COG) capacitors

NPO is one of the most commonly used monolithic ceramic capacitors with temperature compensation characteristics. Its filling medium is composed of rubidium, samarium and some other rare oxides.

NPO capacitors are one of the most stable capacitors in terms of capacitance and dielectric loss. At temperatures from -55 ° C to +125 ° C, the capacitance changes by 0±30ppm/ ° C, and the capacitance changes with frequency by less than ±0.3ΔC. The drift or lag of NPO capacitors is less than ±0.05%, which is negligible compared to thin film capacitors greater than ±2%. The typical variation in capacity relative to service life is less than ±0.1%. The capacitance and dielectric loss of NPO capacitors vary with frequency depending on the package form, and the frequency characteristics of large package size are better than that of small package size. The following table shows the optional capacity range of NPO capacitors.

Package DC=50V DC=100V 0805 0.5-- 1000pF 0.5-- 820pF 1206 0.5-- 1200pF 0.5-- 1800pF 1210 560-- 5600pF 560-- 2700pF 2225 1000pF-- 0.033μF 1000pF-- 0.018μF NPO capacitors are suitable for slot capacitors in oscillators, resonators, and coupling capacitors in high-frequency circuits.

Second, X7R capacitors, X7R capacitors are called temperature stable ceramic capacitors. When the temperature is -55 ° C to +125 ° C, the capacity change is 15%, it should be noted that the capacitor capacity change is non-linear at this time. The capacity of the X7R capacitor is different under different voltage and frequency conditions, and it also changes with time, changing about 1%ΔC every 10 years, showing a change of about 5% over 10 years. X7R capacitors are mainly used in less demanding industrial applications where the capacity change is acceptable when the voltage changes. Its main feature is that the power capacity can be relatively large under the same volume.

The following table shows the capacity ranges available for X7R capacitors. Encapsulated DC=50V DC=100V 0805 330pF-- --0.056μF 330pF-- --0.012μF 1206 1000pF-- --0.15μF 1000pF-- --0.047μF 1210 1000pF-- --0.22μF 1000pF-- 0.1μF 2225 0.01μF-- 1μF 0.01μF-- 0.56μF

Third, Z5U capacitor

Z5U capacitors are called "universal" ceramic monolithic capacitors. The first thing to consider here is the use of temperature range, the main thing for Z5U capacitors is its small size and low cost.

For the above three ceramic monolithic capacitors, it is said that the Z5U capacitor has the largest capacitance under the same volume. However, its electrical capacity is greatly affected by the environment and working conditions, and its aging rate can decrease by up to 5% every 10 years. Despite its unstable capacity, due to its small size, low equivalent series inductance (ESL) and equivalent series resistance (ESR), and good frequency response, it has a wide range of applications. Especially in the application of decoupling circuits. The following table gives the range of values for Z5U capacitors.

Encapsulation DC 25 0805 v DC 50 v 0.01 u F - 0.12 u F 0.01 u F - 0.1 u F 1206 0.01 u F - 0.33 u F 0.01 u F - 0.27 u F 1210 0.01 u F - 0.68 u F 0.01 u F - 0.47 u F u F 0.01 u F - 2225-1 0.01 u F - 1 u F Z5U capacitors of other technical indicators are as follows: working temperature range + 10 ℃ - + 85 ℃ temperature characteristic dielectric loss maximum + 22% -- - 56% to 4%

Four, Y5V capacitor

The Y5V capacitor is a general purpose capacitor with a certain temperature limit, and its capacity can vary from +22% to -82% in the range of -30 ° C to 85 ° C. Y5V's high dielectric constant allows capacitors up to 4.7μF to be manufactured at small physical sizes. The scope of Y5V capacitor as shown in the following table encapsulation DC 25 0805 v DC 50 v 0.01 u F - 0.39 u F 0.01 u F - 0.1 u F 1206 0.01 u F - 1 u F u F - 0.01-0.33 u F 1210 0.1 u F - 1.5 u F 0.01 u F - 0.47 u F 2225 0.68 u F - 2.2 u F 0.68 u F - 1.5 u F Y5V capacitors of other technical indicators are as follows: working temperature range - 30 ℃ - + 85 ℃ temperature characteristic dielectric loss maximum + 22% -- - 82% to 5%.