1、 IEC 60717 Edition 2.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Method for the determination of the space required by capacitors and resistors with unidirectional terminations Mthode pour la dtermination de lencombrement des condensateurs et rsistances sorties unilatrales IEC 60717:2012 T
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16、E INTERNATIONALE Method for the determination of the space required by capacitors and resistors with unidirectional terminations Mthode pour la dtermination de lencombrement des condensateurs et rsistances sorties unilatrales INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTE
17、RNATIONALE K ICS 31.040; 31.060 PRICE CODE CODE PRIX ISBN 978-2-88912-079-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attent
18、ion! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 60717 IEC:2012 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 Gauge board 5 4 Width and length 6 5 Height 7 6 Information to be given in the relevant specification 8 Annex A (informative) Cro
19、ss-reference 9 Bibliography 10 Figure 1 Chamfer of the gauge board holes . 6 Figure 2 Dimensions of a component with two unidirectional wire terminations 7 Figure 3 Dimensions of a component with more than two unidirectional wire terminations 7 Figure 4 Examples for the height of component with unid
20、irectional wire terminations . 8 Table 1 Grid hole diameters for the gauge board . 6 Table A.1 Cross-references . 9 60717 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METHOD FOR THE DETERMINATION OF THE SPACE REQUIRED BY CAPACITORS AND RESISTORS WITH UNIDIRECTIONAL TERMINATIONS FOREWORD 1)
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30、 of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that s
31、ome of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60717 has been prepared by IEC technical committee 40: Capacitors and resistors for electronic equipment. This
32、second edition cancels and replaces the first edition, published in 1981, and constitutes a technical revision. The main technical changes with respect to the first edition are the following: employment of the millimetre-based grid, the preferred grid system given in IEC 60097, employment of SI unit
33、s only, causing deletion of the imperial dimensions from Table 1, reduction of the tolerance on the chamfer depth in Figure 1, and introduction of requirements on information to be given in a relevant specification. 4 60717 IEC:2012 The text of this standard is based on the following documents: CDV
34、Report on voting 40/2108/CDV 40/2123/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the content
35、s of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60717 IEC:2012 5
36、METHOD FOR THE DETERMINATION OF THE SPACE REQUIRED BY CAPACITORS AND RESISTORS WITH UNIDIRECTIONAL TERMINATIONS 1 Scope This International Standard applies to capacitors and resistors with unidirectional wire terminations intended for use in electronic equipment. This standard provides a method for
37、determination of the space required by capacitors and resistors with unidirectional wire terminations. NOTE Instead of measuring the actual space, it may be sufficient to ensure that a component fits into the maximum space for which it is designed. This may be achieved by means of fixed gauges. 2 No
38、rmative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment
39、s) applies. IEC 60097, Grid systems for printed circuits IEC 60294:, Measurement of the dimensions of a cylindrical component having two axial terminations 1IEC 60301, Preferred diameters of wire terminations of capacitors and resistors 3 Gauge board The gauge board shall provide an orthogonal matri
40、x of holes based on standard grid dimensions as given in IEC 60097. Unless prescribed otherwise by the relevant specification, the nominal grid spacing shall be a multiple of 0,5 mm, preferably 2,5 mm. The non- cumulative tolerance on the relative position of grid holes along the same axis shall be
41、0,02 mm. The gauge board shall have a nominal thickness T of 1,5 mm. The grid hole diameters shall relate to the dimensions of the wire terminations according to commonly accepted printed circuit board practice. Unless prescribed otherwise by the relevant specification, the diameter of grid holes in
42、 the gauge board shall be selected from Table 1. _ 1To be published. 6 60717 IEC:2012 Table 1 Grid hole diameters for the gauge board Diameter d a bof wire terminations mm Diameter D cof gauge board grid holes mm 0,5 0,6 0,7 and 0,8 1,0 1,2 0,8 1,0 1,3 1,6 1,8 NOTE Rectangular terminations are consi
43、dered like cylindrical terminations, with a diameter determined by the diagonal of the terminations cross-section.aNominal diameter of the lead wire, permissible tolerance according to IEC 60301. bFor diameters of terminations which do not meet the given values, the prescription for the next larger
44、given diameter shall be applied. cThe tolerance on the grid hole diameter D shall be 0,02 mm.The gauge board grid holes shall be chamfered on the side intended for insertion of the wire terminations as shown in Figure 1. D (0,20 0,02) mm T 45 IEC 829/12 Key T Thickness of the gauge board D Diameter
45、of the gauge board grid hole Figure 1 Chamfer of the gauge board holes The relevant specification shall prescribe the characteristics of a special gauge board for the scope of components covered therein, if the above prescriptions are not suitable for those components. 4 Width and length The width a
46、nd length of the space required by a mounted component shall be measured as follows: The terminations of the component to be measured shall be positioned and fully inserted into the holes of a gauge board with the appropriate grid hole diameter from the chamfered side. Any built-in feature for mount
47、ing shaIl be used as intended. No more force than appropriate for the specific terminations shall be applied during insertion. The width W of the component shall be measured as the distance between two parallel planes perpendicular to the gauge board face and parallel to the lines of grid holes and
48、tangential to the corresponding pair of sides of the component, as shown in Figures 2 and 3. 60717 IEC:2012 7 L W IEC 830/12 Key L Length of the space required by a mounted component W Width of the space required by a mounted component Figure 2 Dimensions of a component with two unidirectional wire
49、terminations L W IEC 831/12 Key L Length of the space required by a mounted component W Width of the space required by a mounted component Figure 3 Dimensions of a component with more than two unidirectional wire terminations Similarly, the length L is the distance between two similar planes at right angles to the width planes and tangential to the other corresponding pair of sides of the component. The p
