選購瓷片電容的時候，需要注重的不僅僅是品牌，更要注重是否與實際需求的參數相符合。不同參數所需要使用的電容是不同的，必須要保障參數與實際需求相符合，才能確保性能的發揮。

　　When choosing ceramic capacitor, we should not only pay attention to the brand, but also pay attention to whether it is consistent with the actual demand parameters. Different parameters need to use different capacitance, we must ensure that the parameters are consistent with the actual demand, in order to ensure the performance.

　　而對于參數來說，其中最重要的就是耐壓值，準確識別耐壓值才能選擇到可靠的電容。那么瓷片電容的耐壓值是多少該如何識別呢？

　　For the parameters, the most important is the withstand voltage value, which can be accurately identified to select a reliable capacitor. So how to identify the withstand voltage value of ceramic capacitor?

　　瓷片電容的耐壓值是多少呢？這首先需要了解的就是電容的標識方法。首先最常用的就是直標法，也就是說，如果數字是0.001，那它代表的是0.001uF＝1nF，如果是10n，那么就是10nF，同樣100p就是100pF。 當然，還有不標單位的直接表示法，采用的是1~4位數字表示，容量單位為pF，如350為350pF，3為3pF，0.5為0.5pF。

　　What is the withstand voltage value of ceramic capacitor? The first thing we need to know is the identification method of capacitance. First of all, the most commonly used method is direct labeling, that is, if the number is 0.001, it represents 0.001 UF = 1NF, if it is 10N, then it is 10nf, and 100p is 100pF. Of course, there is also a direct expression of non-standard units, which is expressed in 1-4 digits, and the capacity unit is PF. For example, 350 is 350pf, 3 is 3pf, 0.5 is 0.5pf.

　　其次還有色碼表示法。沿電容引線方向，用不同的顏色表示不同的數字，第一，二種環表示電容量，第三種顏色表示有效數字后零的個數（單位為pF）顏色意義：黑=0、棕=1、紅==3、黃=4、綠=5、藍=6、紫=7、灰=8、白=9。

　　Secondly, there is color code representation. Along the direction of the capacitor lead, different colors are used to represent different numbers. The first and second rings represent the capacitance, and the third color represents the number of zeros after the significant number (in PF). Color meaning: Black = 0, brown = 1, red = = 3, yellow = 4, green = 5, blue = 6, purple = 7, gray = 8, white = 9.

　　瓷片電容器有高壓瓷片和普通瓷片電容器，普通瓷片電容器耐壓過去標準是50V，高壓瓷片電容器有幾百伏的，有幾千伏的，一般在容值下面標出XXKV。1J代表 6.3×10=63V；2F代表 3.15×100=315V；3A代表 1.0×1000=1000V；1K代表 8.0×10=80V。數字最大為4，如4Z代表90000V。

　　Porcelain capacitor includes high-voltage porcelain chip capacitor and common ceramic chip capacitor. The withstand voltage standard of common ceramic chip capacitor was 50V in the past. High voltage ceramic capacitor has several hundred volts and several thousand volts. Generally, xxkv is marked under the capacity value. 1J stands for 6.3 × 10 = 63v; 2F stands for 3.15 × 100 = 315v; 3A stands for 1.0 × 1000 = 1000V; 1K stands for 8.0 × 10 = 80V. The maximum number is 4, for example, 4Z stands for 90000 v.

　　電容器耐壓的標注也有兩種常見方法，一種是把耐壓值直接印在電容器上，另一種是采用一個數字和一個字母組合而成。

　　There are two common methods to mark the withstand voltage of capacitor. One is to directly print the withstand voltage value on the capacitor, and the other is to use a combination of a number and a letter.