(4)The capacitor with high insulation resistance, low dielectric loss and low leakage current is preferred. (5)The capacitors shall be selected according to the working environment of the capacitors. The performance parameters of capacitors are closely related to the conditions in which they are use

The working voltage of the capacitor should meet the requirements of the circuit. In general, the rated voltage of the selected capacitor should be 1.2～1.3 times of the actual working voltage. For the circuit with high temperature or poor stability in the working environment, the rated voltage of th

(2) Reasonably determine the capacitance and allowable deviation of the capacitor. In the low-frequency coupling and decoupling circuits, the capacitance is generally not strict, as long as according to the calculated value of a slightly larger capacity can be selected. In the circuits such as timin

Correct selection of capacitors (1)Type of capacitor should be selected according to circuit requirements. For the low frequency circuit and DC circuit, the paper capacitor or the low frequency ceramic capacitor can be used. In high frequency circuit, mica capacitor, high frequency ceramic capacitor