IEC 63093-5-2025 铁氧体磁芯尺寸和表面不规则度限制指南第5部分：用于电感器和变压器的EP型磁芯及相关部件

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IEC 63093-5

Edition 2.0 2025-12

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 63093-5:2025-12(en)

ICS 29.100.10

ISBN 978-2-8327-0907-8

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IEC 63093-5:2025 © IEC 2025

CONTENTS

FOREWORD ........................................................................................................................... 2

1 Scope .............................................................................................................................. 4

2 Normative references ...................................................................................................... 4

3 Terms and definitions ...................................................................................................... 4

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

4.1 General ................................................................................................................... 4

4.2 Dimensions of EP-cores .......................................................................................... 5

4.2.1 Principal dimensions ........................................................................................ 5

4.2.2 Effective parameter and Amin values ............................................................... 5

4.3 Dimensional limits for coil formers .......................................................................... 6

4.4 Pin locations and base outlines ............................................................................... 7

5 Limits of surface irregularities .......................................................................................... 8

5.1 General ................................................................................................................... 8

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

5.3 Chips and ragged edges ......................................................................................... 9

5.3.1 General ........................................................................................................... 9

5.3.2 Chips and ragged edges on the mating surfaces .............................................. 9

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

5.4 Cracks .................................................................................................................. 12

5.5 Flash .................................................................................................................... 12

5.6 Pull-outs ............................................................................................................... 12

5.7 Crystallites ............................................................................................................ 13

5.8 Pores .................................................................................................................... 14

Annex A (informative) EP-core design.................................................................................. 15

A.1 General ................................................................................................................. 15

A.2 Pin location and base outlines .............................................................................. 15

Figure 1 – Principal dimensions of EP-cores ........................................................................... 5

Figure 2 – Main dimensions of coil formers for EP-cores ......................................................... 6

Figure 3 – Pin locations (SMD type) viewed from the upper side of the board ......................... 7

Figure 4 – Pin locations (PTH type) viewed from the underside of the board ........................... 8

Figure 5 – Examples of surface irregularities .......................................................................... 9

Figure 6 – Chip and ragged edge location for EP-cores ........................................................ 10

Figure 7 – Crack flash and pull-out locations for EP-cores .................................................... 12

Figure 8 – Crystallite location for EP-cores ........................................................................... 13

Figure 9 – Pore location for EP-cores ................................................................................... 14

Table 1 – Principal dimensions of EP-cores ............................................................................ 5

Table 2 – Effective parameter and Amin values ....................................................................... 6

Table 3 – Dimensional limits for coil formers for EP-cores....................................................... 6

Table 4 – Area and length reference for visual inspection ..................................................... 11

Table 5 – Limits for cracks .................................................................................................... 13

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摘要：

IEC 63093-5-2025《铁氧体磁芯尺寸和表面不规则度限制指南第5部分：用于电感器和变压器的EP型磁芯及相关部件》是国际电工委员会发布的规范文档，主要规定EP型铁氧体磁芯及相关部件的尺寸参数与表面不规则度限制要求。该标准适用于电感器、变压器等磁性元件的设计、制造、选型、检验与质量控制，有助于统一EP型磁芯的互换性、装配精度和性能可靠性。本文档围绕IEC 63093-5-2025的技术内容、适用范围、尺寸要求、表面缺陷限制及使用注意事项进行说明，方便工程师、采购人员和检测机构快速检索E

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IEC 63093-5-2025 铁氧体磁芯尺寸和表面不规则度限制指南第5部分：用于电感器和变压器的EP型磁芯及相关部件

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