IEC Standards IEC 60401-1-2020 pdf free download – Terms and nomenclature for cores made of magnetically soft ferrites – Part 1: Terms used for physical irregularities and reference of dimensions IEC 60401-1-2020 pdf free download - Terms and nomenclature for cores made of magnetically soft ferrites – Part 1: Terms used for physical irregularities and reference of dimensions. This part of lEC 60401 provides a nomenclature of... 02-14 Download Now