IEC 60062 pdf download Marking codes for resistors and capacitors
This International Standard specifies marking codes for resistors and capacitors and indexesfor 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.
lt is intended for use with the values of the E6 to E192 series as specified in lEC 60063.
The code specified in Clause 4 gives a system for marking resistance and capacitance valuesby means of letters and digits.
The code specified in Clause 5 gives a system for marking the tolerance on resistance andcapacitance values by means of a letter.
The code specified in Clause 6 gives systems for marking the date codes on capacitors andresistors by means of letters and digits.
The code (index) specified in Clause 7 gives a coding system for the dielectric material.
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 editionof the referenced document (including any amendments) applies.
lEC 60063:1963,Preferred number series of resistors and capacitors
ISO 1043-1:2001，Plastics – Symbols and abbreviated terms – Part 1: Basic polymers andtheir special characteristics
IsO 8601:2000，Data elements and interchange formats – Information interchange -Representation of dates and times
3Colour 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 shallbe 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 beso 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 andtolerance.
3.4 Colour code marking for fixed resistors
Table 1 – Values corresponding to colours
For the indication of temperature coefficients according to the code as described above one ofthe 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 existingbands of colour code indicating the resistance value and tolerance,with the helix coveringnot less than 270° of the circumference.
For other types，similar methods of colour coding should be used as described in thedetail specification.
Colour-code marking of the temperature coefficient shall only be used in combination withthree significant figures.
3.4.1 Example of colour-code marking for resistance values with two significant
Resistor of 27 000 2 with a tolerance of +5 %.
3.4.2 Example of colour-code marking for resistance values with three significant figures
Resistor of 249 000 Ω with a tolerance of ±1 %.