IEC_60393-6-2003.pdf

INTERNATIONALSTANDARDIEC60393-6First edition2003-05Potentiometers for usein electronic equipment Part 6:Sectional specification:Surface mount preset potentiometersReference numberIEC 60393-6:2003(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe 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,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(http:/www.iec.ch/searchpub/cur_fut.htm)enables you to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just Published This summary of recently issued publications(http:/www.iec.ch/online_news/justpub/jp_entry.htm)is also available by email.Please contact the CustomerService Centre(see below)for further information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC60393-6First edition2003-05Potentiometers for usein electronic equipment Part 6:Sectional specification:Surface mount preset potentiometers IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chUFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60393-6 IEC:2003(E)CONTENTSFOREWORD.31General.41.1Scope.41.2Object.41.3Normative references.41.4Information to be given in a Detail Specification.52Preferred ratings,characteristics and test severities.92.1Preferred characteristics.92.2Preferred values of ratings.142.3Preferred test severities.163Quality assessment procedures.173.1Structurally similar components.173.2Qualification approval.173.3Quality conformance inspection.253.4Delayed delivery.26Figure 1 Suitable substrate for mechanical and electrical tests(may not be suitablefor impedance measurements).7Figure 2 Suitable substrate for electrical tests.8Figure 3 Rated dissipation curve.15Figure 4 Rated dissipation curve with larger area of operation.15Table 1 Temperature coefficients and temperature characteristics of resistance.10Table 2 Limits for change in resistance and output ratio.11Table 3 Fixed sample size test schedule for qualification approval Assessmentlevel E.19Table 4 Assessment level corresponding to inspection subgroup.25Table 5 Assessment level corresponding to inspection subgroup.26LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60393-6 IEC:2003(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION_POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMENT Part 6:Sectional specification:Surface mount preset potentiometersFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall national electrotechnical committees(IEC National Committees).The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to other activities,the IEC publishes International Standards.Their preparation isentrusted to technical committees;any IEC National Committee interested in the subject dealt with mayparticipate in this preparator