IEC 61333:2019规定了铁氧体磁芯上的标记位置和标记编码系统。印刷或附接到芯上的字母数字标记降低了在装配线上不正确组装、材料混合和/或有间隙芯混合的风险。电感因子AL值或间隙长度的标记对于避免这种问题特别重要，并且在本文中指定了它们的编码系统。 与上一版相比，此版本包括以下重大技术变更: a)文件标题已更改； b)扩大了本文件的范围； c)在第4条中增加了环形铁芯、平面铁芯、RM铁芯、PQ铁芯和罐铁芯的标记位置说明，并增加了一些附加说明； d)5.2中删除了物料识别码的四位数最大限值； e)在表1中，AL的单位从“nH”变更为“nH/N2”。

IEC 61333:2019 specifies marking locations and a coding system of marking on ferrite cores. An alphanumerical marking printed or attached to cores reduces the risk of incorrect assembly, mixing of materials and/or mixing of gapped cores on an assembly line. The markings of the inductance factor AL value or of the gap length are especially important to avoid this kind of problem, and their coding system is specified in this document.
This edition includes the following significant technical changes with respect to the previous edition：
a) the title of the document was changed;
b) the scope of this document was expanded;
c) the marking position instructions for ring cores, planar cores, RM-cores, PQ-cores and pot-cores were added in Clause 4 with a few additional descriptions;
d) the four-digit-maximum limit of material identification code has been deleted in 5.2;
e) in Table 1, the unit of AL has been changed from "nH" to "nH/N2".