This video presentation from Würth Elektronik discusses the next generation of self-heating definition using IEC standards: Performance Rated Current.
Currently there is no uniformly test method used to define the self-heating of passive components.
By introducing, the Performance Rated Current Würth Elektronik eiSos is the first manufacturer of passive components, which are using an IEC standard for defining the self-heating of the components and provides by doing this, the best possible transparence for this value to our customers.
Source:
Würth Elektronik