The basic unit of a electrolytic capacitor is Farah (F), but this unit is too large and is rarely used in field marking.

Other unit relationships are as follows:





capacitorThe deviation between the actual capacitance of the electrolytic capacitor and the nominal capacitance is called tolerance, and the accuracy is called within the allowable deviation range.


Correspondence between accuracy level and allowable error: 00(01)-±1%, 0(02)-±2%, I-±5%, II-±10%, III-±20%, IV-(+20% -10%), V-(+50%-20%), VI-(+50%-30%)

Generally, capacitors are commonly used in Class I, II, and III, and electrolytic capacitors are in Class IV, V, and VI, depending on the application.