JEC IEC61249-2-52 Edition 1.0 2025-09 NTERNATIONAL STANDARD NORME INTERNATIONALE Materials for printed boards and other interconnecting structures : Part 2-52: Reinforced base materials clad and unclad - Thermosetting hydrocarbon resin system, woven E-glass reinforced laminate sheets of defined flammability (vertical burning test), copper-clad Matériauxpour circuits imprimes et autres structures d'interconnexion Partie2-52:Materiauxdebaserenforces,metalliseset nonmetallisés-Feuilles stratifiees renforcees en tissude verre detype E avec systemede résines d'hydrocarburethermodurcissables,d'inflammabilite definie(essaide combustion verticale),plaquees cuivre IEC 61249-2-52:2025-09(en-fr) ICS 31.180 ISBN 978-2-8327-0724-1 THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright @ 2025 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by IEC's 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. Droits de reproduction réserves. Sauf indication contraire, aucune partie de cette publication ne peut etre reproduite ni utilisee sous quelque forme que ce soit et par aucun procede, electronique ou mecanique, y compris la photocopie et les microfilms, sans 'accord écrit de IIEC ou du Comite national de I'IEC du pays du demandeur. Si vous avez des questions sur le copyright de TIEC ou si vous desirez obtenir des droits supplementaires sur cette publication, utilisez les coordonnees ci-apres ou contactez le Comite national de IIEC de votre pays de residence. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembé [email protected] www.iec.ch CH-1211Geneva 20 Switzerland 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. AboutIECpublications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published. IEC publicationssearch- IEC Products & Services Portal - products.iec.ch webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the The advanced search enables to find IEC publications by publications previews, graphical symbols and the glossary. criteria (reference number, text, With a subscription you will always have access to up to a variety technical committee, ..). It also gives information on date contenttailoredtoyourneeds projects, replaced and withdrawn publications. Electropedia-www.electropedia.org IEC JustPublished-webstore.iec.ch/justpublished The world's leading online dictionary on electrotechnology, Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English details all new publications released. Available online and and French, with equivalent terms in 25 additional languages once a month by email. Also known as the International Electrotechnical Vocabulary (IEV) online. IECCustomerServiceCentre-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: [email protected]. A propos de I'IEC La Commission Electrotechnique Internationale (lEC) est la premiere organisation mondiale qui élabore et publie des Normes internationales pourtout ce qui a trait a I'électricite,a I'électronique et aux technologies apparentees. Apropos des publications IEC Le contenu technique des publications IEC est constamment revu. Veullez vous assurer que vous possedez I'edition la plus recente, un corrigendum ou amendement peut avoir éte publie. IEC Products & Services Portal-products.iec.