IEC 61332:2016(E)规定了满足电子行业要求的电感元件（电感器和变压器）中使用的软铁氧体材料的分类规则。本文档针对铁氧体供应商和用户解决了以下问题: -来自多个供应商的材料之间的交叉引用； -在比较多个供应商时，协助客户了解目录中公布的技术数据； -指导客户为每种应用选择最适用的材料； -为与铁氧体有关的IEC标准设定命名法； -为供应商在新材料开发方面的表现建立统一的基准。 与上一版相比，此版本包括以下重大技术变更:a)由于功率损耗密度过大，从表3的子类中删除了“c”等级； b)在表3中的子类PW3、PW4和PW5中添加“A宽”等级； c)将PW3级的“B”从100公吨改为200公吨；“B x f”和“功率损耗密度”也已更改； d)将PW4级的“B”从50公吨改为100公吨；“B x f”和“功率损耗密度”也已更改。

IEC 61332:2016(E) specifies classification rules for soft ferrite materials used in inductive components (inductors and transformers) fulfilling the requirements of the electronic industries. This document addresses the following issues for ferrite suppliers and users:
- cross-reference between materials from multiple suppliers;
- assistance to customers in understanding the published technical data in catalogues when comparing multiple suppliers;
- guidance to customers in selecting the most applicable material for each application;
- setting of nomenclature for IEC standards relating to ferrite;
- establishing uniform benchmarks for suppliers for performance in new development of materials.
This edition includes the following significant technical changes with respect to the previous edition:
a) deleted "c" rank from subclass from Table 3, because of too large power loss density;
b) added "a-wide" rank in subclasses PW3, PW4 and PW5 in Table 3;
c) changed "B" of PW3 class from 100 mT to 200 mT; "B x f" and "power loss density" have also been changed;
d) changed "B" of PW4 class from 50 mT to 100 mT; "B x f" and "power loss density" have also been changed.