IEC 62358:2012提供了Pot、RM、ETD、E、EER、EP、PQ和低轮廓间隙铁氧体磁芯的标准AL值（电感系数）及其公差。与之前的版本相比，此版本包括以下重大技术变更: a)添加AL值（电感因子）及其对PQ芯的容差； b)添加AL值(电感因子)及其对EFD磁芯的容差； c)添加AL值（电感因子）及其低轮廓ER-I-芯的公差； d)增加了AL值（电感系数）及其低轮廓ER磁芯的公差（ER9，5 × 2，5 × 5，ER11 × 2，5 × 6，ER14，5 × 3 × 7铁氧体磁芯与上一版相同）； e)添加AL值（电感系数）及其薄型PQ-I磁芯的公差。

IEC 62358:2012 provides standard AL values (inductance factors) and their tolerances of Pot, RM, ETD, E, EER, EP, PQ and low-profile gapped ferrite cores. This edition includes the following significant technical changes with respect to the previous editions:
a) addition of AL value (inductance factor) and its tolerance for PQ-cores;
b) addition of AL value (inductance factor) and its tolerance for EFD-cores;
c) addition of AL value (inductance factor) and its tolerance for Low-profile ER-I-cores;
d) addition of AL value (inductance factor) and its tolerance for Low-profile ER-cores (ER9,5 x 2,5 x 5, ER11 x 2,5 x 6, ER14,5 x 3 x 7 ferrite cores are same as the previous edition);
e) addition of AL value (inductance factor) and its tolerance for Low-profile PQ-I-cores.