UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

CENELEC - EN 60063

Preferred number series for resistors and capacitors

active, Most Current
Organization: CENELEC
Publication Date: 1 May 2015
Status: active
Page Count: 16
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 r√10 , with r = 3 · 2i, and i being a whole number in the range of 0 to 6, hence e.g. of 12√10 .

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 10√10 system, was never considered achievable.

1 IEC 60063:1952, Series of preferred values and their associated tolerances for resistors and capacitors

Document History

EN 60063
May 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...

References

Advertisement