47μF/100V的电容基本上都是铝电解电容，电解电容厂家发现这种电容高频性能较差，电容量也不是很稳定，并且耐压值达100V的电解电容，体积一般都较大，在电路中这种电容一般作为高压滤波电容或耦合电容。

　　47 μ f / 100V capacitors are basically aluminum electrolytic capacitors. Electrolytic capacitor manufacturers found that the high-frequency performance of this kind of capacitor is poor, and the capacitance is not very stable. Moreover, the electrolytic capacitor with voltage withstand value of 100V is generally large. In the circuit, this kind of capacitor is generally used as high-voltage filter capacitor or coupling capacitor.

　　虽然一些超低频振荡电路或定时电路会用到47μF的电解电容，但这类电路的工作电压一般较低，即使用到47μF的电解电容，也不会选用耐压值这么高的电解电容，因为在电容量相同时，一般电解电容的耐压值越高，体积就越大。

　　Although some ultra-low frequency oscillation circuit or timing circuit will use 47 μ f electrolytic capacitor, the working voltage of this kind of circuit is generally low, that is, the electrolytic capacitor with 47 μ f will not be selected with such high withstand voltage value, because when the capacitance is the same, the higher the withstand voltage value is, the larger the volume will be.

　　这种47μF/100V的电解电容，在电源电压较高的滤波电路和耦合电路中较常用。像上图所示的RC降压LED驱动电路中，一般都在LED灯珠两端并联一个数十μF的滤波电容，若驱动电路驱动的是十几个串联的白光LED灯珠，滤波电容C2一般选用耐压值为100V的滤波电容，其容量大都为10～47μF。

　　This 47 μ f / 100V electrolytic capacitor is commonly used in filter circuit and coupling circuit with high power supply voltage. In the RC step-down LED drive circuit as shown in the above figure, a filter capacitor with tens of μ f is generally connected at both ends of the LED lamp bead. If the driving circuit drives more than ten white LED beads in series, the filter capacitor C2 generally selects the filter capacitor with voltage withstand value of 100V, and its capacity is mostly 10-47 μ F.　　

　　电解电容厂家在与众多厂家合作的同时，发现一些测量仪表中的高压交流放大器，若采用阻容耦合，一般也会用到47μF/100V的电解电容。

　　In cooperation with many manufacturers, electrolytic capacitor manufacturers have found that 47 μ f / 100V electrolytic capacitor will be used in some high-voltage AC amplifiers in measuring instruments if resistance capacitance coupling is adopted.