IEC 60062 2004 pdf – Marking codes for resistors and capacitors.
Scope This International Standard specifies marking codes for resistors and capacitors and indexes for the dielectric material and the electrodes of plastic film and paper capacitors. The code specified in Clause 3 gives a colour coding for fixed resistors. It is intended for use with the values of the E6 to E1 92 series as specified in IEC 60063. The code specified in Clause 4 gives a system for marking resistance and capacitance values by means of letters and digits. The code specified in Clause 5 gives a system for marking the tolerance on resistance and capacitance values by means of a letter. The code specified in Clause 6 gives systems for marking the date codes on capacitors and resistors by means of letters and digits. The code (index) specified in Clause 7 gives a coding system for the dielectric material. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60063:1 963, Preferred number series of resistors and capacitors ISO 1 043-1 :2001 , Plastics – Symbols and abbreviated terms – Part 1: Basic polymers and their special characteristics ISO 8601 :2000, Data elements and interchange formats – Information interchange – Representation of dates and times 3 Colour code for fixed resistors 3.1 The colour code for indicating resistance values to two and three significant figures, tolerances and, if needed, the indication of the temperature coefficient of fixed resistors shall be as given in 3.2, 3.3 and 3.4. 3.2 The first band shall be the one nearest to the end of the resistor and the bands shall be so placed and spaced that there can be no confusion in reading the coding. 3.3 Any additional coding shall be so applied as not to confuse the coding for value and tolerance.
For the indication of temperature coefficients according to the code as described above one of the following methods shall be used: a) a colour band as the sixth and wider band; b) an interrupted colour band as the sixth band; c) a helix. For cylindrical types, the helix shall be superimposed on the full length of the existing bands of colour code indicating the resistance value and tolerance, with the helix covering not less than 270° of the circumference. For other types, similar methods of colour coding should be used as described in the detail specification. Colour-code marking of the temperature coefficient shall only be used in combination with three significant figures. 3.4.1 Example of colour-code marking for resistance values with two significant figures Resistor of 27 000 Ω with a tolerance of ±5 %.
4 Letter and digit code for resistance and capacitance values 4.1 General rules 4.1 .1 The code shall use 3, 4 or 5 characters consisting of 2 figures and a letter, 3 figures and a letter, or 4 figures and a letter, as required. 4.1 .2 The code letters replace the decimal point as shown in the examples in Tables 2 and 3. 4.1 .3 Any additional code letter or digit shall appear after the tolerance letter specified in Clause 5 and shall be so applied as not to confuse the coding for value and tolerance.