IEC 63093-5-2018 pdf download.Ferrite cores – Guidelines on dimensions and the limits of surface irregularities – Part 5: EP-cores and associated parts for use in inductors and transformers (IEC 63093-5:2018).
This part of IEC 63093 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of EP-cores made of ferrite, the essential dimensions of coil formers to be used with them and the locations of their terminal pins on a 2,50 mm printed wiring grid in relation to the base outlines of the cores and the effective parameter values to be used in calculations involving them. It also gives guidelines on allowable limits of surface irregularities applicable to EP-cores. The specifications contained in this document are useful in negotiations between ferrite core manufacturers and users about surface irregularities. The general considerations upon which the design of this range of cores is based are as given in Annex A.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60205, Calculation of the effective parameters of magnetic piece parts IEC 60401 -1 , Terms and nomenclature for cores made of magnetically soft ferrites – Part 1: Terms used for physical irregularities IEC 60424-1 , Ferrite cores – Guidelines on the limits of surface irregularities – Part 1: General specification
3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60401 -1 and IEC 60424-1 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Primary dimensions
4.1 General
Compliance with the following requirements ensures mechanical interchangeability of complete assemblies and wound coil formers.
4.2 Dimensions of EP-cores
4.2.1 Principal dimensions
The principal dimensions of EP-cores shall be those given in Figure 1 and Table 1 .
4.2.2 Effective parameter and A min values
The effective parameter values of a pair of cores having the dimensions given in 4.2.1 are as shown in Table 2. For the definitions of these parameters and their calculations, reference shall be made to IEC 60205.
4.3 Dimensional limits for coil formers
The main dimensions of coil formers suitable for use with a pair of EP-cores shall be as given in Figure 2 and Table 3.
4.4 Pin locations and base outlines
Pin locations and base outlines shall be as shown in Figure 3, in which the base is viewed in the mounting direction, i.e. from the upper side of the printed wiring board, and in Figure 4, in which the base is viewed from the pin side, i.e. from the underside of the printed wiring board.IEC 63093-5 pdf download.