1、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 SUP
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8、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 pot
9、entiometers 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 Var
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11、OR 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 characteristi
12、cs.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 s
13、uitablefor 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 resi
14、stance 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
15、 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 world
16、wide 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
