PUBLICLY IEC AVAILABLE PAS 62435 SPECIFICATION Pre-Standard First edition 2005-09 HNTERTAMESENITHISLANONNASORLED BY BOOK SPPLY BURAU. Electronic components : Long-duration storage of electronic components - Guidance for implementation IEC Reference number IEC/PAS 62435:2005(E) Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example, IEC 34-1is now referred to as IEC 60034-1. Consolidated editions The IEc is now publishing consolidated versions of its publications. For example. edition numbers 1.0, 1.1 and 1.2 refer, respectively,to the base publication, the amendments 1 and 2. Furtherinformationon IEC publications The technical content of IEC publications is kept under constant review by the IEC, HOENSERTAMUSENI HISLOCANONBANYASORELIED BY BOK SPLY BUREAU. this.publication, including itsvalidity, is available in the IEc Catalogue of publications (see below) in addition to new editions, amendments and corrigenda. information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: IEc Web Site (www.iec.ch) CatalogueofIEC publications The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summary of recently issued publications (www.iec.ch/online news/ justpub) is also available by email. Please contact the Customer Service Centre (see below) for further information SLP Customer Service Centre If you have any questions regarding this publication or need further assistance please contact the Customer Service Centre: Email: [email protected] Tel: +41 22 919 02 11 +41229190300 Fax: PUBLICLY IEC AVAILABLE PAS 62435 SPECIFICATION Pre-Standard First edition 2005-09 HENSERTAMSENI THISLOANONBNYASORLED BY OOK SPLY BUREAU Electronic components Long-duration storage of electronic components - Guidance for implementation IEC 2005—Copyright-all rightsreserved mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11Telefax: +41 22 919 03 00E-mail: [email protected]: www.iec.ch PRICE CODE U IEC Commission Electrotechnique Internationale International Electrotechnical Commission MexAyHapoAHagnekTpoTexHMyeckagKoMccWA For price, see current cafalogue PAS62435@IEC:2005(E) 2 CONTENTS FOREWORD 4 INTRODUCTION. .5 Scope 6 2 Normative references .6 3 Storage decision criteria. .6 3.1 Advantages..... 3.1.1 Technical simplicity -- Rapidity..... 3.1.2 Solution durability ... 3.1.3 Preventive storage.. 3.2 Hazards -Drawbacks.. 3.2.1 Generic aging hazard.. 3.2.2 Poor stock dimensioning 3.2.3 Incorrect control of reliability during storage 3.2.4 Freezing equipment functionalities 8 AL.U 3.3 Storage cost 3.4 Decision criteria.. Purchasing - Procurement. 4 4.1 List of components .... 4.2 Quantity of componentstobe stored.. 4.2.1 Production stock.. TION 4.2.2 Field service stock. NC 4.3 When is it worth keeping in stock? X 4.4 Procurement recommendations. 10 Technical validation of the components. 5 10 5.1 Purpose 5.2 Relevant field .. 5.3 Test selection criteria .. 5.4 Measurementsandtests.. 11 5.4.1 Sampling .... 11 5.4.2 Visual examination, sealing,solderability. 5.4.3 Compliance with the electrical specifications 12 .13 5.4.4 Assessment of the supplied batch reliability... 5.4.5 Manufacturing control check (technological analysis)... .15 5.5 Sanction... .15 Conditioning and storage .. 15 6 6.1 Type of environment. 15 6.2 Elementary storage unit. 16 6.3 Stock management 16 6.4 Redundancy