IEC 60401-1:20 20作为IEC 60401-1:20 20 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。 IEC 60401-1:20 20提供了与软铁氧体（磁性氧化物）制成的磁芯相关的最常见表面、体积和形状不规则性的命名法。大多数不规则性都以图形方式举例说明作为视觉辅助。附件A还提出了一项一般性建议，要求采用一致的方案来指定违规行为的确切位置，将该位置的通用名称与指定位置的更详细的限定词结合起来。在准备技术文件、不规则性检查规范等时，本文件也可用作术语参考。该文献还提出了一种用于定义软铁氧体磁芯形状的主要物理属性的名称命名的方法。本文件的目的是促进制造商、说明者和用户在图纸、表格和目录规格表上描述核心尺寸时统一使用尺寸字符。第二版取消并取代了2002年发布的IEC 60401-1第一版和2009年发布的IEC 60401-2第二版。本版构成技术修订版。与IEC 60401-1和IEC 60401-2之前版本相比，本版本包括以下重大技术变更: -在4.3.1.6中增加了表面不规则术语“孔隙”； -在4.3.6.3中增加了表面不规则术语“划痕”； -删除了IEC 60401-1:20 02 4.1.5中的表面不规则术语“凹坑”； -删除了5中的整体不规则性术语“超孔隙”。1、IEC 60401-1:20 02 5.2中的“夹杂物”、5.3中的“内部分层”和5.4中的“内部裂纹”； -删除了IEC 60401-1:20 02 7.1.3和7.4中与“轭环铁芯”相关的内容； -将4.3.4.7中的表面不规则术语“分层”改为“层压”； -将图A.1中与位置相关的术语“背面的上表面”替换为“底表面”，将“背面的下表面”替换为“背面”； -将IEC 60401-1:20 02的第7条变更为附录A。

IEC 60401-1:2020 is available as IEC 60401-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60401-1:2020 provides a nomenclature of the most frequent surface, bulk and shape irregularities relevant to cores made of soft ferrites (magnetic oxides). Most irregularities are graphically exemplified as visual aids. A general recommendation is also given in Annex A for a consistent scheme for specifying the exact location of the irregularity, combining a general name for the location with more detailed qualifiers of the specified location. This document can also be useful as a terminology reference when preparing technical documentation, irregularity inspection specifications, etc. This document also presents a method for defining the designation nomenclature for the major physical attributes of soft ferrite core shapes. The purpose of this document is to facilitate uniform usage of dimensional characters by manufacturers, specifiers, and users when describing core dimensions on drawings, in tables, and on catalogue specification sheets. This second edition cancels and replaces the first edition of IEC 60401-1 published in 2002 and the second edition of IEC 60401-2 published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous editions of IEC 60401-1 and IEC 60401-2:
- added the surface irregularity term “pores” in 4.3.1.6;
- added the surface irregularity term “scratch” in 4.3.6.3;
- removed the surface irregularity term “crater” in 4.1.5 of IEC 60401-1: 2002;
- removed the bulk irregularity terms “superpores” in 5.1, “inclusions” in 5.2, “internal stratification” in 5.3 and “internal crack” in 5.4 of IEC 60401-1: 2002;
- removed the contents related to “yoke ring cores” in 7.1.3 and 7.4 of IEC 60401-1:2002;
- replaced the surface irregularity term “stratification” with “lamination” in 4.3.4.7;
- replaced the location related terms “upper surface of back” with “bottom surface” and “lower surface of back” with “back surface” in Figure A.1;
- changed Clause 7 of IEC 60401-1:2002 into Annex A.