BS EN 60063:2015
$102.76
Preferred number series for resistors and capacitors
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 16 |
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 .
The number series defined in this standard are based on progressive ratios of [Formula removed.], with r = 3 · 2 i , and i being a whole number in the range of 0 to 6, hence e.g. of [Formula removed.] .
This system of progressive ratios had been established prior to the 1952 release of the first edition of this standard 1 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 [Formula removed.] system, was never considered achievable.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Foreword Endorsement notice |
| 5 | Annex ZA (normative) Normative references to international publications with their corresponding European publications |
| 6 | English CONTENTS |
| 7 | FOREWORD |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions 4 Number series 4.1 Number series with two significant digits |
| 10 | 4.2 Number series with three significant digits Table 1 – Number series with two significant digits |
| 11 | Table 2 – Number series with three significant digits |
| 12 | 5 Application of an E series 5.1 Relationship between E series and tolerances Table 3 – Tolerances and recommended E series |
| 13 | 5.2 Deduction from the marking and coding of values |
| 14 | Bibliography |
