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Capacitance and capacitance error
Dec 21, 2018

The capacitance of a capacitor is determined by the impedance present when measuring the ac capacity. Ac capacitance usually varies with frequency, voltage, and measurement methods, except to varying degrees for capacitors of different specifications, unless capacitance is required to be particularly accurate and temperature characteristics to be particularly stable. Although capacitance of capacitors may vary in different conditions (such as frequency, temperature, voltage) F, except for ceramic capacitors with high dielectric coefficient, the capacitance of capacitors is generally lower than the tolerance accuracy of capacitance with the change of application conditions.


During the manufacturing process of capacitors, it is impossible to ensure that the capacitance of each capacitor is exactly the same as the design value (or the nominal value). There is always a certain deviation, that is, the capacitance tolerance of capacitors, sometimes known as the capacitance error. The capacitance of a capacitor is usually expressed as a percentage. The capacitance tolerances of most capacitors are class J: + 5%, class K: + 10%, class M: + 20%, class s: + 50%/-20%, class Z: + 80% /-20%. Except for a few capacitors with a capacity of K: + 10%, but also useful M: + 20% or even z: + 80% / 1 20%.

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