This International Standard specifies the standards and existing projects dealing with the dimensions of ferrite cores. These standards are gathered in a single series under the reference IEC 62317.It is intended that this standard will include ferrite cores which are widely used and referenced in industry, either because they are included in national standards, or because they are seen to have broad-based use in industry. Where applicable, it is intended that the existing industrial name for each standard part should appear with the part within this series.It is intended that this standard will exclude ferrite cores which are specialty cores with limited u