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(E) 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.
This edition includes the following significant technical changes with respect to IEC 62317-­5:2015:
a. addition of the limits of surface irregularities.

General Information

Status
Published
Publication Date
26-Jun-2018
Current Stage
PPUB - Publication issued
Completion Date
27-Jun-2018
Ref Project

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IEC 63093-5
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
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 63093-5:2018-06(en)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63093-5
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
Ferrite cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 5: EP-cores and associated parts for use in inductors and transformers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-5833-0

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 63093-5:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 Primary dimensions ......................................................................................................... 6

4.1 General ................................................................................................................... 6

4.2 Dimensions of EP-cores .......................................................................................... 6

4.2.1 Principal dimensions ........................................................................................ 6

4.2.2 Effective parameter and A values ............................................................... 6

min

4.3 Dimensional limits for coil formers........................................................................... 7

4.4 Pin locations and base outlines ............................................................................... 8

5 Limits of surface irregularities .......................................................................................... 9

5.1 General ................................................................................................................... 9

5.2 Examples of surface irregularities ........................................................................... 9

5.3 Chips and ragged edges ....................................................................................... 10

5.3.1 General ......................................................................................................... 10

5.3.2 Chips and ragged edges on the mating surfaces ............................................ 10

5.3.3 Chips and ragged edges on the other surfaces .............................................. 10

5.4 Cracks .................................................................................................................. 13

5.5 Flash .................................................................................................................... 13

5.6 Pull-outs ............................................................................................................... 13

5.7 Crystallites ............................................................................................................ 14

5.8 Pores .................................................................................................................... 15

Annex A (normative) EP-core design ................................................................................... 16

A.1 General ................................................................................................................. 16

A.2 Pin location and base outlines .............................................................................. 16

Bibliography .......................................................................................................................... 17

Figure 1 – Principal dimensions of EP-cores ........................................................................... 6

Figure 2 – Main dimensions of coil formers for EP-cores ......................................................... 7

Figure 3 – Pin locations (SMD type) viewed from the upper side of the board ......................... 8

Figure 4 – Pin locations (PTH type) viewed from the underside of the board ........................... 9

Figure 5 – Examples of surface irregularities ........................................................................ 10

Figure 6 – Chip location for EP-cores.................................................................................... 11

Figure 7 – Crack and pull-out locations for EP-cores ............................................................. 13

Figure 8 – Crystallite location for EP-cores ........................................................................... 14

Figure 9 – Pore location for EP-cores ................................................................................... 15

Table 1 – Principal dimensions of EP-cores ............................................................................ 6

Table 2 – Effective parameter and A values ....................................................................... 7

min

Table 3 – Dimensional limits for coil formers for EP-cores ....................................................... 7

Table 4 – Area and length reference for visual inspection ..................................................... 12

Table 5 – Limits for cracks .................................................................................................... 14

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IEC 63093-5:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 5: EP-cores and associated parts for use
in inductors and transformers
FOREWORD

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International Standard IEC 63093-5 has been prepared by IEC technical committee 51:

Magnetic components, ferrite and magnetic powder materials.

This first edition cancels and replaces the first edition of IEC 62317-5 published in 2015. This

edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to

IEC 62317-5:2015:
a) addition of the limits of surface irregularities.
---------------------- Page: 5 ----------------------
– 4 – IEC 63093-5:2018 © IEC 2018
The text of this standard is based on the following documents:
CDV Report on voting
51/1212/CDV 51/1233/RVC
Full information on the voting for the approval of
...

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