电解电容器有两根引脚，在有极性电解电容器中，这两根引脚有正、负极之分，新的有极性电解电容器的两根引脚一长一短，以区分引脚的正、负极性，长的引脚为正极。无极性电解电容器的两根引脚没有正、负极之分。

　　The electrolytic capacitor has two pins. In the polar electrolytic capacitor, the two pins are positive and negative. The two pins of the new polar electrolytic capacitor are long and short to distinguish the positive and negative polarity of the pin, and the long pin is the positive pole. There is no positive or negative pole in the two pins of the non-polar electrolytic capacitor.

　　有极性电解电容器极性的识别方法：

　　Identification method for polarity of polar electrolytic capacitor:

　　电解电容器有圆柱形和片状两大类，前者是常见的电解电容器。由于电解电容器的体积都比较大，外壳上有足够大的面积来标注电解电容器的参数和引脚极性，这里常用圆柱形电解电容器的识别方法。

　　There are two types of electrolytic capacitors: cylindrical and sheet. The former is a common electrolytic capacitor. Because the volume of electrolytic capacitor is relatively large, there is enough area on the shell to mark the parameters and pin polarity of electrolytic capacitor, so the identification method of cylindrical electrolytic capacitor is commonly used.

　　在电解电容器上，一般采用直标法标出标称容量及允许偏差、额定电压等。

　　In electrolytic capacitors, the nominal capacity, allowable deviation and rated voltage are generally marked by direct standard method.

　　对有极性电解电容器，还要标出引脚的极性。

　　For the electrolytic capacitor with polarity, also mark the polarity of the pin.

　　有极性电解电容器的正、负引脚表示方式有多种，这里归纳如下，以供识别时参考。

　　There are many ways to express the positive and negative pins of a polar electrolytic capacitor, which are summarized as follows for reference in identification.

　　（1）正极性引脚采用“+”符号表示，此时外壳上标有一个“+”号，表示这根引脚是正极，另一根是负极；相反负极引脚采用“-”符号表示，外壳上有“-”的是负极脚；另一根为正极脚如图

　　(1) The positive pin is indicated by "+", at this time, there is a "+" sign on the shell, which indicates that this pin is positive and the other is negative; on the contrary, the negative pin is represented by the sign of "+", and the one with "-" on the shell is the negative pin; the other is the positive pin, as shown in the figure

　　标有正负极的电解电容器

　　Electrolytic capacitors with positive and negative electrodes

　　（2）电解电容器采用不同的端头形状表示引脚的极性，这种方式往往出现在两根引脚轴向分布的电解电容器中如图：

　　(2) Electrolytic capacitors use different end shapes to represent the polarity of the pins, which is often found in the electrolytic capacitors with two pin axial distribution, as shown in the figure

端头表示引脚的电解电容器

　　An electrolytic capacitor with an end indicating a pin

　　（3）电解电容器采用不同长短脚表示引脚极性，通常长的引脚表示正极，短的表示负极这种方法对新的电容器有效，使用过后被剪成一样长短的就无法分辨如图

　　(3) Electrolytic capacitors use different long and short pins to indicate the polarity of the pins. Generally, the long pins represent the positive and the short ones represent the negative. This method is effective for new capacitors. After being cut into the same length after use, they cannot be distinguished, as shown in the figure

长脚为正极，短脚为负极

　　The long leg is positive and the short leg is negative

　　电解电容器的容量一般均较大，在1μF以上（有些进口电解电容器的容量小于这一值），而且这种电容器绝大多数采用直标法。

　　The capacity of electrolytic capacitors is generally larger than 1 μ f (the capacity of some imported electrolytic capacitors is less than this value), and most of these capacitors adopt direct standard method.

　　电解电容参数方法：电解电容器的参数表示方式采用直标法，由于电解电容器的体积较大，标称容量，耐压等参数值直接标在外壳上面。

　　Electrolytic capacitor parameter method: the direct standard method is adopted for the parameter expression of electrolytic capacitor. Due to the large volume of electrolytic capacitor, the nominal capacity, withstand voltage and other parameter values are directly marked on the shell.

　　不同材料的电解电容器能从型号上分辨出来；如用CD CA 和CN分别表示铝 钽 铌电解电容。以上就是电解电容厂家总结出的识别电解电容的方法，希望对您有所帮助。

　　The electrolytic capacitors of different materials can be distinguished from the model, for example, the electrolytic capacitors of Al TA NB are represented by CD Ca and CN respectively. The above is the electrolytic capacitor manufacturers summed up the identification method of electrolytic capacitor, hope to help you.