IEC 60939-1:2005
(Main)Passive filter units for electromagnetic interference suppression - Part 1: Generic specification
Passive filter units for electromagnetic interference suppression - Part 1: Generic specification
relates to passive filter units for electromagnetic interference suppression for use within, or associated with, electronic or electrical equipment and machines. Both single- and multi-channel filters within one enclosure are included within the scope of this generic specification. The contents of the corrigendum of November 2005 have been included in this copy.
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INTERNATIONAL IEC
STANDARD 60939-1
Second edition
2005-02
Passive filter units for electromagnetic
interference suppression –
Part 1:
Generic specification
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INTERNATIONAL IEC
STANDARD 60939-1
Second edition
2005-02
Passive filter units for electromagnetic
interference suppression –
Part 1:
Generic specification
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 Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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Commission Electrotechnique Internationale
V
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue
– 2 – 60939-1 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, symbols and terminology .7
2.2 Terms and definitions .8
2.3 Preferred values.10
2.4 Marking .10
3 Quality assessment procedures.10
3.1 General .10
3.2 Primary stage of manufacture.11
3.3 Subcontracting .11
3.4 Structurally similar filters .11
3.5 Qualification approval procedures .12
3.6 Capability approval procedures .12
3.7 Rework and repair work.13
3.8 Release for delivery .14
3.9 Certified test records .14
3.10 Delayed delivery.14
3.11 Alternative test methods .14
3.12 Unchecked parameters.14
4 Test and measurement procedures.15
4.1 General .15
4.2 Standard atmospheric conditions.15
4.3 Drying .16
4.4 Visual examination and check of dimensions.16
4.5 Insulation resistance .17
4.6 Voltage proof.19
4.7 Insertion loss.22
4.8 Discharge resistance.22
4.9 Robustness of terminations .22
4.10 Resistance to soldering heat .24
4.11 Solderability .24
4.12 Rapid change of temperature .25
4.13 Vibration.25
4.14 Bump .25
4.15 Shock.25
4.16 Container sealing .26
4.17 Climatic sequence .26
4.18 Damp heat, steady state.27
4.19 Temperature rise.27
4.20 Current overload .28
60939-1 IEC:2005(E) – 3 –
4.21 Endurance.28
4.22 Charge and discharge test.28
4.23 Passive flammability.31
4.24 Active flammability .31
4.25 Solvent resistance of marking.31
4.26 Component solvent resistance.32
Figure 1 – Asymmetrical and symmetrical test circuit .9
Figure 2 – Examples of the application of Table 3.19
Figure 3 – Test circuit for d.c. test .20
Figure 4 – Relay circuit .29
Figure 5 – Thyristor circuit .29
Figure 6 – Voltage and current waveforms .30
Table 1 – Standard atmospheric conditions.16
Table 2 – DC voltage for insulation resistance .17
Table 3 – Measuring points.19
Table 4 – Force for wire terminations .23
Table 5 – Torque .23
Table 6 – Number of cycles .27
Table 7 – Categories of flammability .31
– 4 – 60939-1 IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
PASSIVE FILTER UNITS FOR ELECTROMAGNETIC
INTERFERENCE SUPPRESSION –
Part 1: Generic specification
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
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International Standard IEC 60939-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This second edition cancels and replaces the first edition published in 1988. This second
edition constitutes a technical revision.
The major changes that have been made between the first and the second edition are:
– Clause 3 has been updated in accordance with the usual practice in IEC TC 40 documents.
– Discharge resistance, current overload, passive flammability, active flammability, solvent
resistance of marking and component solvent resistance have be
...
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