IEC 62024-2:2008

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Standard atmospheric conditions
  4.1 Standard atmospheric conditions for testing
  4.2 Reference conditions
5 Measuring method of DC saturation limited current
  5.1 General
  5.2 Test conditions
  5.3 Measurement circuit and calculation
  5.4 Attachment jig of inductor
  5.5 Measuring method
  5.6 Quality conformance inspection
6 Measuring method of temperature rise limited current
  6.1 General
  6.2 Test conditions
  6.3 Measurement jig
      6.3.1 Printed-wiring board method
      6.3.2 Lead wire method
  6.4 Measuring method and calculation
      6.4.1 Resistance-substitution method
      6.4.2 Thermo-couple method
  6.5 Quality conformance inspection
7 Determination of rated current
8 Information to be given in the detail specification
  8.1 Measuring method of DC saturation limited current
  8.2 Measuring method of temperature rise limited current
Annex A (informative) Example of recommended description on
                      product specification sheets and
                      catalogues

IEC 62024-2:2008 specifies the measuring methods of the rated direct current limits for small inductors. Standardized measuring methods for the determination of ratings enable users to accurately compare the current ratings given in various manufacturers' data books. This standard is applicable to leaded and surface mount inductors with dimensions according to IEC 62025-1 and generally with rated current less than 22 A, although inductors with rated current greater than 22 A are available that fall within the dimension restrictions of this standard (no larger than 12 mm x 12 mm footprint approximately). These inductors are typically used in DC to DC converters built on PCB, for electric and telecommunication equipment, and small size switching power supply units. The measuring methods are defined by the saturation and temperature rise limitations induced solely by direct current.