DIN EN 60424-3:2016 Ferrite cores - Guidelines on the limits of surface irregularities - Part 3: ETD-cores, EER-cores, EC-cores and E-cores (IEC 60424-3:2015); German version EN 60424-3:2016
2018DIN EN IEC 63093-7:2018 Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 7: EER-cores (IEC 63093-7:2018); German version EN IEC 63093-7:2018
2016DIN EN 60424-3:2016 Ferrite cores - Guidelines on the limits of surface irregularities - Part 3: ETD-cores, EER-cores, EC-cores and E-cores (IEC 60424-3:2015); German version EN 60424-3:2016
2000DIN EN 60424-3:2000 Ferrite cores - Guide on the limits of surface irregularities - Part 3: ETD-cores and E-cores (IEC 60424-3:1999); German version EN 60424-3:1999