1、 INTERNATIONAL STANDARD IEC62319-1 First edition2005-02 Polymeric thermistors Directly heated positive step function temperature coefficient Part 1:Generic specification Reference number IEC 62319-1:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY
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8、 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONAL STANDARD IEC62319-1 First edition2005-02 Polymeric thermistors Directly heated positive step function temperature coefficient Part 1:Generic specifi
9、cation IEC 2005 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 the publisher.International Electrotechnical Commission,3,rue de Varemb
10、,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.ch V For price,see current catalogue PRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALORE
11、FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62319-1 IEC:2005(E)CONTENTS FOREWORD.4 1 General.6 1.1 Scope.6 1.2 Normative references.6 2 Technical data.7 2.1 Units and symbols.7 2.2 Terms and definitions.7 2.3 Preferred values.10 2.4 Marking.11 3 Quality assessment procedu
12、res.11 3.1 General.11 3.2 Primary stage of manufacture.11 3.3 Subcontracting.12 3.4 Structurally similar components.12 3.5 Qualification approval procedures.12 3.6 Rework and repair.18 3.7 Release for delivery.18 3.8 Certified test records of released lots.19 3.9 Delayed delivery.19 3.10 Alternative
13、 test methods.19 3.11 Manufacture outside the geographical limits of IECQ NSIs.19 3.12 Unchecked parameters.19 4 Test and measurement procedures.19 4.1 Standard conditions for testing.19 4.2 Drying and recovery.20 4.3 Visual inspection and check of dimensions.20 4.4 Zero power resistance.21 4.5 Insu
14、lation resistance(for insulated types only).21 4.6 Voltage proof(for insulated types only).22 4.7 Robustness of terminations(for leaded types only).22 4.8 Soldering.23 4.9 Mounting.23 4.10 Rapid change of temperature.24 4.11 Climatic sequence.24 4.12 Cycle life testing.25 4.13 Trip endurance.27 4.14
15、 Trip current.28 4.15 Hold current.28 4.16 Residual current and power dissipation.29 4.17 Time-to-trip.29 4.18 Cold environmental electrical cycling.30 4.19 Thermal runaway.30 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62319-1 IEC
16、:2005(E)3 Annex A(normative)Fixed sample size test schedules for qualification approval.31 Annex B(normative)Vibration-,bump-,shock-,shear-,substrate bending test.32 B.1 Vibration.32 B.2 Bump.32 B.3 Shock.33 B.4 Shear(adhesion)test.33 B.5 Substrate bending test.33 Figure 1 Test schedule flow chart.15 Figure 2 Circuit for Trip endurance.28 Table 1 Fixed sample size test schedule for qualification approval of Polymeric PTC thermistors for current limitation,assessment level EZ.16 Table 2 Quality c
