DIN EN 60424-5:2009 Ferrite cores - Guide on the limits of surface irregularities - Part 5: Planar-cores (IEC 60424-5:2009); German version EN 60424-5:2009
2021DIN EN IEC 63093-9:2021 Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 9: Planar cores (IEC 63093-9:2020); German version EN IEC 63093-9:2020
2009DIN EN 60424-5:2009 Ferrite cores - Guide on the limits of surface irregularities - Part 5: Planar-cores (IEC 60424-5:2009); German version EN 60424-5:2009