What does it mean to identify 220v on the safety capacitor?

The safety capacitor is used for such occasions, that is, after the capacitor fails, it will not cause electric shock and does not endanger personal safety. It is beneficial to the protection of personal safety. There will also be certain signs on such products. Safety capacitors include X capacitors and Y capacitors. Usually X capacitor gold film capacitor, Y capacitor ceramic capacitor. The X-capacitor between the live zero line and the Y-capacitor between the live line and the ground. They are used in the power supply filter and act as a power filter, respectively, to filter the common mode and differential mode.

It should be noted that it is necessary to purchase safety certified safety capacitors, which are determined by the special design and process of the capacitors. Do not use ordinary capacitors instead of safety capacitors. Here refers to the Safety capacitor 220V logo should be safety X2 capacitor. On the safety capacitor, the symbol 220v stands for the degree of withstand voltage. That is to say cannot exceed 220v, otherwise it will cause explosion or failure due to high pressure. How high voltage withstand needs, X capacitor is generally across the line, so as long as the voltage level can be met, such as 220v system we choose 275V safety capacitor, 380V system selection 440V or with 2 275V series, the surge does not exceed less than 2.5KV selects the X2 capacitor, and the X1 capacitor is greater than 2.5KV and less than 4KV. So 2000v surge, you can choose X2 capacitor.