选购瓷片电容的时候，需要注重的不仅仅是品牌，更要注重是否与实际需求的参数相符合。不同参数所需要使用的电容是不同的，必须要保障参数与实际需求相符合，才能确保性能的发挥。

　　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.

　　而对于参数来说，其中最重要的就是耐压值，准确识别耐压值才能选择到可靠的电容。那么瓷片电容的耐压值是多少该如何识别呢？

　　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?

　　瓷片电容的耐压值是多少呢？这首先需要了解的就是电容的标识方法。首先最常用的就是直标法，也就是说，如果数字是0.001，那它代表的是0.001uF＝1nF，如果是10n，那么就是10nF，同样100p就是100pF。 当然，还有不标单位的直接表示法，采用的是1~4位数字表示，容量单位为pF，如350为350pF，3为3pF，0.5为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.

　　其次还有色码表示法。沿电容引线方向，用不同的颜色表示不同的数字，第一，二种环表示电容量，第三种颜色表示有效数字后零的个数（单位为pF）颜色意义：黑=0、棕=1、红==3、黄=4、绿=5、蓝=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.

　　瓷片电容器有高压瓷片和普通瓷片电容器，普通瓷片电容器耐压过去标准是50V，高压瓷片电容器有几百伏的，有几千伏的，一般在容值下面标出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。数字最大为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.

　　电容器耐压的标注也有两种常见方法，一种是把耐压值直接印在电容器上，另一种是采用一个数字和一个字母组合而成。

　　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.