高压电解电容的上限容量已扩展到4f左右，运用频率已达到30khz，工作温度规模已达到-55℃—125℃，有的甚至高到150℃，额外电压己达到700v。当然商品越多选择也就越多，电解电容厂家告诉您如何选用高压电解电容呢？

　　The upper limit capacity of high voltage electrolytic capacitor has been extended to about 4f, the operating frequency has reached 30kHz, the working temperature scale has reached - 55 ℃ - 125 ℃, some even as high as 150 ℃, and the additional voltage has reached 700V. Of course, the more products, the more choices, electrolytic capacitor manufacturers tell you how to choose high voltage electrolytic capacitors?

　　1、通常高压电解电容的电容差错大些，不会严重影响电路的正常作业，所以可以取电容量略大一些或略小一些的电容器替代。但在分频电路、ｓ校对电路、振动回路及回路中不可，电容量应和核算请求的尽量共同。在一些滤波网络中，黑金刚电解电容，电解电容的容量也请求非常，其差错应小于±0.3－0.5。

　　Generally, the capacitance error of high voltage electrolytic capacitor is larger, which will not seriously affect the normal operation of the circuit. Therefore, the capacitor with a slightly larger or smaller capacitance can be used instead. However, it is not allowed in the frequency division circuit, s-check circuit, vibration circuit and circuit, and the capacitance should be as common as possible with the accounting request. In some filter networks, the capacity of black diamond electrolytic capacitor and electrolytic capacitor is also very high, and the error should be less than ± 0.3-0.5.

　　2、选用原型号高压电解电容。

　　The prototype high voltage electrolytic capacitor is selected.

　　3、耐压请求必须满意，选用的耐压值应等于或大于原来的值。

　　The voltage withstand request must be satisfied, and the selected withstand voltage value should be equal to or greater than the original value.

　　4、通常运用无极性电解电容替代，真实无办法时可用两只容量大一倍的有极性电容逆串联后替代，方法是将两只要极性电解电容的正极相连（或将它们的两个负极相连）。

　　In general, nonpolar electrolytic capacitors are usually used instead. When there is no way, two polar capacitors with double capacity can be used in reverse series instead. The method is to connect the positive electrodes of two polar electrolytic capacitors (or connect their two negative electrodes).

　　5、在选用高压电解电容时，选用耐高温的高压电解电容，耐高温电容的高作业温度为105℃，当其在高作业温度条件下作业时，能确保2000小时左右的正常作业时间。在50℃下运用80℃的电容时，其寿数可达2.2万小时，假如此刻运用高温高压电解电容，其寿数可达9万小时。

　　When selecting high-voltage electrolytic capacitor, high-temperature resistant high-voltage electrolytic capacitor is selected. The high operating temperature of high-temperature resistant capacitor is 105 ℃. When it works at high operating temperature, it can ensure about 2000 hours of normal operation time. When 80 ℃ capacitor is used at 50 ℃, its life can reach 22000 hours. If high temperature and high voltage electrolytic capacitor is used at the moment, its life can reach 90000 hours.