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IEC_61191-4-2017.pdf
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IEC_61191 2017
IEC 61191-4 Edition 3.0 2017-07 INTERNATIONAL STANDARD Printed board assemblies Part 4:Sectional specification Requirements for terminal soldered assemblies IEC 61191-4:2017-07(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Android Tablets and iPad.IEC publications search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.IEC 61191-4 Edition 2.0 2017-07 INTERNATIONAL STANDARD Printed board assemblies Part 4:Sectional specification Requirements for terminal soldered assemblies INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.240 ISBN 978-2-8322-4657-3 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC 61191-4:2017 IEC 2017 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Terms and definitions.6 4 General requirements.6 5 General terminal and part mounting requirements.6 5.1 General.6 5.2 Wire and cable preparation.7 5.2.1 General.7 5.2.2 Tinning of stranded wire.7 5.3 Terminal installation.7 5.3.1 General.7 5.3.2 Terminal mounting(mechanical).7 5.3.3 Terminal shank discontinuities.8 5.3.4 Flange discontinuities.8 5.3.5 Terminal mounting(electrical).8 5.3.6 Flange angles.9 5.3.7 Shank discontinuities.9 5.3.8 Flared flange discontinuities.9 5.4 Mounting to terminals.10 5.4.1 General.10 5.4.2 Wire and lead wrap-around.10 5.4.3 Side route connection.10 5.4.4 Top and bottom route connection.11 5.4.5 Continuous runs.12 5.4.6 Service loops.13 5.4.7 Insulation clearance.13 5.4.8 Orientation of wire wrap.14 5.4.9 Stress relief.14 5.4.10 Pierced or perforated terminals.14 5.4.11 Cup and hollow cylindrical terminal soldering.15 6 Acceptance requirements.16 6.1 General.16 6.2 Control and corrective actions.16 6.3 Terminal soldering.16 6.3.1 General.16 6.3.2 Wire-terminal attachment.16 6.4 Part marking and reference designations.16 7 Rework of unsatisfactory soldered connections.16 Bibliography.18 Figure 1 Rolled flange terminal.8 Figure 2 Rolled flange discontinuities.8 Figure 3 Flared flange terminals.9 Figure 4 Flared angles.9 IEC 61191-4:2017 IEC 2017 3 Figure 5 Wire and lead wrap around.10 Figure 6 Side route connections and wrap on bifurcated terminal.11 Figure 7 Top and bottom route terminal connection.12 Figure 8 Continuous run wire wraps.13 Figure 9 Service loop for lead wiring.13 Figure 10 Insulation clearance measurement(c).14 Figure 11 Stress relief examples.14 Figure 12 Pierced or perforated terminal wire wrap.15 Table 1 Nicked or broken strand limits.7 Table 2 Plated through-holes with

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