IEC？63093-11:20 18（E）规定了对于由铁氧体制成的EC磁芯的优选范围的机械互换性重要的尺寸和与其一起使用的线圈形成器的基本尺寸，以及在涉及它们的计算中使用的有效参数值。它还给出了适用于EC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客户之间关于表面不规则性的谈判。 这个第一版取消并取代了IEC的第一版？2015年出版的62317-11和IEC第二版？60424-3发表于2015年。此版本构成技术修订。？ 本文件包括以下与IEC相关的重大技术变更？62317-11:20 15和IEC？60424-3:2015: 本文档集成了IEC？62317-11:20 15和IEC？60424-3:2015; 桌子？3-IEC EC内核芯片的允许面积？60424-3:20 15，已移至附件？B（资料性）。

IEC？63093-11:2018(E) specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of EC-cores made of ferrite and the essential dimensions of coil formers to be used with them, as well the effective parameter values to be used in calculations involving them. It also gives guidelines on allowable limits of surface irregularities applicable to EC-cores.
The specifications contained in this document are useful in negotiations between ferrite core manufacturers and customers about surface irregularities.
This first edition cancels and replaces the first edition of IEC？62317-11 published in 2015 and the second edition of IEC？60424-3 published in 2015. This edition constitutes a technical revision.？
This document includes the following significant technical changes with respect to IEC？62317-11:2015 and IEC？60424-3:2015:

1. This document integrates IEC？62317-11:2015 and IEC？60424-3:2015;
2. Table？3 – Allowable areas of chips for EC-cores, of IEC？60424-3:2015, has been moved to Annex？B (informative) of this document.