How to identify the ceramic capacitor parameters (I)

Commonly used capacitors are introduced:

Electrolytic capacitors: Most of them are above 1μF and are directly represented by numbers. Such as: 4.7μF, 100μF, 220μF and so on. The two poles of this capacitor have positive and negative points, and the long legs are positive.

Ceramic capacitors: Most are below 1μF and are directly represented by numbers. Such as: 10, 22, 0.047, 0.1, etc., here is the unit. Where expressed in integers, the unit defaults to pF; where expressed in decimals, the unit defaults to μF. As in the above examples, they are 10P, 22P, 0.047 μF, 220 μF, and the like, respectively. Now another international expression method similar to the color ring resistance (unit default pF): for example: "473" means 47000pF=0.047μF, "103" means 10000pF=0.01μF, etc., "XXX" first and second The number is a valid number, and the third number represents the number of 0s added later. This representation is quite common.

Method for identifying ceramic capacitor parameters:

Capacitor identification and identification method:

Straight standard method: If the number is 0.001, it represents 0.001uF=1nF, if it is 10n, then it is 10nF, and the same 100p is 100pF.

Direct representation of non-standard units: expressed in 1~4 digits, the capacity unit is pF, such as 350 is 350pF, 3 is 3pF, and 0.5 is 0.5pF.

Color code representation: In the direction of the capacitor lead, different colors are used to indicate different numbers. The first and second rings represent the capacitance, and the third color represents the number of zeros after the significant digit (in pF). Color Meaning: Black =0, brown=1, red=2, orange=3, yellow=4, green=5, blue=6, purple=7, gray=8, white=9. The ceramic capacitors are high-voltage ceramics and ordinary ceramic capacitors. The ordinary ceramic capacitors have a voltage withstand voltage of 50V. The high-voltage ceramic capacitors have several hundred volts and several thousand volts. Generally, XXKV is marked below the capacitance.