What is the difference between a mica capacitor and a general capacitor?
Is to foil mica capacitor and the mica sheet is laminated in medium, bakelite powder and in die casting.Because of its electrical properties and excellent mechanical properties of mica materials, the mica capacitor self inductance and leakage loss are very small, with a wide range of voltage, high reliability, stable performance, high capacity accuracy. Particularly suitable for use in high frequency oscillation circuit, high precision operational amplifier, filter circuit and so on.
Mica capacitor, low temperature coefficient, generally can reach 1*10^ (-6) / DEG C, than the general organic thin film capacitor (such as polyester capacitors) are much better, compared with ceramic capacitor is a heaven, an underground.Mica capacitors can work in a high temperature environment, the highest temperature can reach 460 DEG C, far more than the general ceramic capacitors (capacitor is the biggest drawbacks of this temperature difference), the aluminum electrolytic capacitor can only work at 105 degrees.The capacity of mica stored for a long time varies between 0.01%-0.02% and is better than that of ordinary capacitorsIf we want to do high quality, high precision, high stability analog circuit, mica capacitor is the best choice. In high-end circuits, such as tens of thousands of prices to hundreds of thousands of Hi-Fi audio, the basic is also used mica capacitor
Mica capacitor as a non-polar capacitor, and non polarity capacitors have great advantages, personally think it is non polarity capacitor in one of the best. The capacity is generally between 4.7-51000pF, the precision can reach + 0.01%- + 0.03%, it is generally difficult to achieve the capacitance (compared with low frequency ceramic capacitor there are a number of aluminum electrolytic capacitor, the capacitance accuracy is + 20%, can be up to + 50%.)Mica capacitor DC voltage in 100-5KV, up to 40KV. and the famous CBB high voltage for a spell, than the general non polarity ceramic capacitor is much higher.
