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IEC 60063

Preferred Number Series for Resistors and Capacitors

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Organization: IEC
Publication Date: 1 March 2015
Status: active
Page Count: 24
ICS Code (Capacitors): 31.060
ICS Code (Resistors): 31.040
scope:

This International Standard provides series of preferred values for the resistance of resistors and for the capacitance of capacitors.

The definition of such series with a defined numeric resolution is a basic prerequisite for the marking and coding of capacitors and resistors with their respective capacitance or resistance values as described in IEC 60062.

NOTE The number series defined in this standard are based on progressive ratios of r10 , with r = 3 · 2i, and i being a whole number in the range of 0 to 6, hence e.g. of 1210 .

This system of progressive ratios had been established prior to the 1952 release of the first edition of this standard1 as a consequence of the standardisation of tolerances at ±5 %, ±10 % and ±20 % and the related commercial practice. An adoption of the ISO practice, based on a 1010 system, was never considered achievable.

Document History

IEC 60063
March 1, 2015
Preferred Number Series for Resistors and Capacitors
This International Standard provides series of preferred values for the resistance of resistors and for the capacitance of capacitors. The definition of such series with a defined numeric resolution...
January 1, 1963
Preferred Number Series for Resistors and Capacitors
The figures given in Table I and their decimal multiples of sub-multiples are series of preferred values with their associated values of tolerances for: a) the resistance of resistors; b) the...

References

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