IEC 63182-3:2021

IEC 63182-3:2021 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of E-cores made of metallic magnetic powder, the essential dimensions of coil formers to be used with them as well as the effective parameter values to be used in calculations involving them, and gives guidelines on allowable limits of surface irregularities applicable to E-cores.
This document is a specification useful in the negotiations between magnetic powder core suppliers and users about surface irregularities.