scope:

For various reasons a manufacturer may wish to publish in his catalogue typical data for material parameters as measured on test pieces. It is the object of the present recommendation to promote the comparability of such information in the area of soft ferrite materials. It should be recognized, however, that there is no direct relation between materiaal characteristics as measured on test pieces and the corresponding parameters measured on other cores, made of the same material, because of difference in geometry, etc. Also the extrapolation of material characteristics to other flux densities and other frequencies will not permit a valid comparison of cores of different materials under these new conditions of operation.