![]() ![]() The E series has been adopted by various international standard organizations including the Electrical Industries Association (EIA). Whereas the IEC 60063 defines the preferred values and tolerances, the IEC 60062 defines marking codes for capacitors and resistors. These standard values are published in the IEC standards, IEC 60063:1963 and IEC 60063:2015. The E series defines capacitance and resistance values as well as tolerances for capacitors and resistors. The International Electrotechnical Commission (IEC) defined the preferred number series in 1952 with the aim of enabling manufacturers to produce passive components more easily. Standardisation of component values allows manufacturers of passive components such as capacitors, resistors, and inductors to manufacturer components with ease. Apart from defining values for passive components, this system, based on progressive ratios, specifies recommended tolerances. ![]() Although it is practically possible to produce a component of nearly any capacitance value, manufacturers use preferred values for ease of manufacturing passive components. These values are based on a geometric series, commonly referred to as the E series. Just like most passive components, capacitors come in standard values.
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