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1、INTERNATIONAL STANDARD IEC 60393-6 First edition 2003-05 Potentiometers for use in electronic equipment Part 6: Sectional specification: Surface mount preset potentiometers Reference number IEC 60393-6:2003(E) Copyright International Electrotechnical Commission Provided by IHS under license with IEC
2、Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example, IEC 34-
3、1 is 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 base publication incorporating amendment 1 and the base publication incorpor
4、ating amendments 1 and 2. Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to this publication, including its validity, is available in the IEC
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7、also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. 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 Customer Service Centre (see
8、 below) for further information. Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Service Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 Copyright International Electrotechnical Commission
9、Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IEC 60393-6 First edition 2003-05 Potentiometers for use in electronic equip
10、ment Part 6: Sectional specification: Surface mount preset potentiometers IEC 2003 Copyright - all rights reserved 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
11、 the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch U For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale
12、International Electrotechnical Commission Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- 2 603
13、93-6 IEC:2003(E) CONTENTS FOREWORD 3 1General . 4 1.1Scope. 4 1.2Object. 4 1.3Normative references . 4 1.4Information to be given in a Detail Specification 5 2Preferred ratings, characteristics and test severities 9 2.1Preferred characteristics. 9 2.2Preferred values of ratings.14 2.3Preferred test
14、severities.16 3Quality assessment procedures 17 3.1Structurally similar components .17 3.2Qualification approval17 3.3Quality conformance inspection .25 3.4Delayed delivery26 Figure 1 Suitable substrate for mechanical and electrical tests (may not be suitable for impedance measurements) . 7 Figure 2
15、 Suitable substrate for electrical tests. 8 Figure 3 Rated dissipation curve 15 Figure 4 Rated dissipation curve with larger area of operation .15 Table 1 Temperature coefficients and temperature characteristics of resistance.10 Table 2 Limits for change in resistance and output ratio.11 Table 3 Fix
16、ed sample size test schedule for qualification approval Assessment level E.19 Table 4 Assessment level corresponding to inspection subgroup25 Table 5 Assessment level corresponding to inspection subgroup26 Copyright International Electrotechnical Commission Provided by IHS under license with IECLice
17、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- 60393-6 IEC:2003(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMENT Part 6: Sectional specificat
18、ion: Surface mount preset potentiometers FOREWORD 1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all
19、 questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may parti
20、cipate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement
21、 between the two organizations. 2)The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3)The documen
22、ts produced have the form of recommendations for international use and are published in the form of standards, technical Specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committe
23、es undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no markin
24、g procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not b
25、e held responsible for identifying any or all such patent rights. International Standard IEC 60393-6 has been prepared by IEC technical committee 40: Capacitors and resistors for electronic equipment. The text of this standard is based on the following documents: FDISReport on voting 40/1288/FDIS40/
26、1324/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This Sectional Specification is to be used in conjunction with IEC 60393-1
27、:1989. The committee has decided that the contents of this publication will remain unchanged until 2008. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended A bilingual version of this publication may be issued at a later date. Copyright Internatio
28、nal Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- 4 60393-6 IEC:2003(E) POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMEN
29、T Part 6: Sectional specification: Surface mount preset potentiometers 1 General 1.1 Scope This International Standard is applicable to surface mount preset potentiometers for use in electronic equipment. 1.2 Object The object of this standard is to prescribe preferred ratings and characteristics an
30、d to select the appropriate quality assessment procedures, tests and measuring methods from IEC 60393-1 and to give general performance requirements for this type of potentiometer. Test severities and requirements prescribed in Detail Specifications referring to this Sectional Specification shall be
31、 of equal or higher performance level, lower performance levels are not permitted. 1.3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of t
32、he referenced document (including any amendments) applies. IEC 60063:1963, Preferred number series for resistors and capacitors Amendment 1 (1967) Amendment 2 (1977) IEC 60068-1, Environmental testing. Part 1: General and guidance IEC 60068-2-20, Environmental testing. Part 2: Tests. Test T: Solderi
33、ng IEC 60068-2-21, Environmental testing Part 2-21: Tests Test U: Robustness of termin- ations and integral mounting devices IEC 60068-2-45, Environmental testing. Part 2: Tests. Test XA and guidance: Immersion in cleaning solvents IEC 60068-2-58, Environmental testing Part 2-58: Tests Test Td Test
34、methods for solderability, resistance to dissolution of metallization and to soldering heat of surface mounting devices (SMD) IEC 60393-1:1989, Potentiometers for use in electronic equipment Part 1: Generic Specification Amendment 1 (1992) IEC 60410:1973, Sampling plans and procedures for inspection
35、 by attributes Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- 60393-6 IEC:2003(E) 5 IEC QC 001
36、001:2000, IEC Quality Assessment System for Electronic Components (IECQ) Basic rules IEC QC 001002-3:1998, IEC Quality Assessment System for Electronic Components (IECQ) Rules of procedure Part 3: Approval procedures 1.4 Information to be given in a Detail Specification Detail Specifications shall b
37、e derived from the relevant Blank Detail Specification. Detail Specifications shall not specify requirements inferior to those of the generic, sectional or Blank Detail Specification. When more severe requirements are included, they shall be listed in 1.8 of the Detail Specification and indicated in
38、 the test schedules, for example by an asterisk. NOTEThe information given in 1.4.1 and 1.4.3 may, for convenience, be presented in tabular form. The following information shall be given in each Detail Specification and the values quoted shall preferably be selected from those given in the appropria
39、te Clause of this Sectional Specification. 1.4.1 Outline drawing and dimensions The Detail Specification shall incorporate an illustration of the surface mount preset poten- tiometer as aid to easy recognition and for comparison of the surface mount potentiometer with others. Dimensions and their as
40、sociated tolerances, which affect interchangeability and mounting, shall be given in the Detail Specification. All dimensions shall be stated in millimetres. Normally the numerical values shall be given for the length, width and thickness of the body. Where space is insufficient to show the detail d
41、imensions required for inspection purposes, such dimensions shall appear on the drawing forming an annex to the Detail Specification. Recommended land patterns shall be given in Detail Specification. When the outline drawing is other than described above, the Detail Specification shall state such di
42、mensional information as will adequately describe the surface mount potentiometer. 1.4.2 Mounting The Detail Specification shall give guidance on methods of mounting for normal use. Mounting for test and measurement purposes (when required) shall be in accordance with the following Subclauses1, unle
43、ss otherwise specified. 1.4.2.1 Surface mount potentiometers shall be mounted on a suitable substrate; the method of mounting will depend on the potentiometer construction. The Detail Specification shall indicate which material is to be used for electrical measurements. The substrate shall have meta
44、llized land areas of proper spacing to permit mounting of surface mount potentiometers, and it shall provide electrical connection to the surface mount potentiometer terminals. The details shall be specified in the Detail Specification. _ 1 The text of 1.4.2 and its Subclauses will be integrated in
45、a future edition of IEC 60393-1. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:26:05 MSTNo reproduction or networking permitted without license from IHS -,-,- 6 60393-6 IEC:
46、2003(E) Examples of test substrates for mechanical and electrical tests are shown in Figures 1 and 2 respectively. If another mounting method applies, the method should be clearly described in the Detail Specification. 1.4.2.2 When the Detail Specification specifies wave soldering, a suitable glue,
47、details of which may be specified in the Detail Specification, shall be used to fasten the component to the substrate before soldering is performed. Small dots of glue shall be applied between the conductors of the substrate by means of a suitable device securing repeatable results. The surface moun
48、t potentiometers shall be placed on the dots using tweezers. In order to ensure that no glue is applied to the conductors, the surface mount potentiometers shall not be moved about. The substrate with the surface mount potentiometers shall be heat-treated in an oven at 100 C for 15 min. The substrate shall be soldered in a wave soldering apparatus. The apparatus shall be adjusted to have a pre-heating temperature of 80 C to 100 C, a solder b