電解電容器有兩根引腳，在有極性電解電容器中，這兩根引腳有正、負極之分，新的有極性電解電容器的兩根引腳一長一短，以區分引腳的正、負極性，長的引腳為正極。無極性電解電容器的兩根引腳沒有正、負極之分。

　　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.

　　有極性電解電容器極性的識別方法：

　　Identification method for polarity of polar electrolytic capacitor:

　　電解電容器有圓柱形和片狀兩大類，前者是常見的電解電容器。由于電解電容器的體積都比較大，外殼上有足夠大的面積來標注電解電容器的參數和引腳極性，這里常用圓柱形電解電容器的識別方法。

　　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.

　　在電解電容器上，一般采用直標法標出標稱容量及允許偏差、額定電壓等。

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

　　對有極性電解電容器，還要標出引腳的極性。

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

　　有極性電解電容器的正、負引腳表示方式有多種，這里歸納如下，以供識別時參考。

　　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）正極性引腳采用“+”符號表示，此時外殼上標有一個“+”號，表示這根引腳是正極，另一根是負極；相反負極引腳采用“-”符號表示，外殼上有“-”的是負極腳；另一根為正極腳如圖

　　(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

　　標有正負極的電解電容器

　　Electrolytic capacitors with positive and negative electrodes

　　（2）電解電容器采用不同的端頭形狀表示引腳的極性，這種方式往往出現在兩根引腳軸向分布的電解電容器中如圖：

　　(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

端頭表示引腳的電解電容器

　　An electrolytic capacitor with an end indicating a pin

　　（3）電解電容器采用不同長短腳表示引腳極性，通常長的引腳表示正極，短的表示負極這種方法對新的電容器有效，使用過后被剪成一樣長短的就無法分辨如圖

　　(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

長腳為正極，短腳為負極

　　The long leg is positive and the short leg is negative

　　電解電容器的容量一般均較大，在1μF以上（有些進口電解電容器的容量小于這一值），而且這種電容器絕大多數采用直標法。

　　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.

　　電解電容參數方法：電解電容器的參數表示方式采用直標法，由于電解電容器的體積較大，標稱容量，耐壓等參數值直接標在外殼上面。

　　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.

　　不同材料的電解電容器能從型號上分辨出來；如用CD CA 和CN分別表示鋁 鉭 鈮電解電容。以上就是電解電容廠家總結出的識別電解電容的方法，希望對您有所幫助。

　　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.