IEC？63093-5:20 18（E）规定了由铁氧体制成的EP磁芯的优选范围的机械互换性的重要尺寸、与其一起使用的线圈形成器的基本尺寸以及其端子引脚在2,50？mm印刷布线网格与芯的基本轮廓和在涉及它们的计算中使用的有效参数值相关。它还给出了适用于EP型芯的表面不规则性允许限值的指南。 本文件中包含的规范有助于铁氧体磁芯制造商和用户之间关于表面不规则性的谈判。这一系列磁芯设计所依据的一般考虑见附件？A. 此版本包括以下与IEC相关的重大技术变化？62317--5:2015: A.？增加了表面不规则性的限制。

IEC？63093-5:2018(E) specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of EP-cores made of ferrite, the essential dimensions of coil formers to be used with them and the locations of their terminal pins on a 2,50？mm printed wiring grid in relation to the base outlines of the cores and the effective parameter values to be used in calculations involving them. It also gives guidelines on allowable limits of surface irregularities applicable to EP-cores.
The specifications contained in this document are useful in negotiations between ferrite core manufacturers and users about surface irregularities. The general considerations upon which the design of this range of cores is based are as given in Annex？A.
This edition includes the following significant technical changes with respect to IEC？62317--5:2015:
a.？addition of the limits of surface irregularities.