EN 60539-1:2016

SLOVENSKI STANDARD
01-oktober-2016
1DGRPHãþD
SIST EN 60539-1:2008
Neposredno ogrevani termistorji z negativnim koeficientom - 1. del: Rodovna
specifikacija (IEC 60539-1:2016)
Directly heated negative temperature coefficient thermistors - Part 1: Generic
specification (IEC 60539-1:2016)
Thermistances à coefficient de température négatif à chauffage direct - Partie 1:
Spécification générique
Ta slovenski standard je istoveten z: EN 60539-1:2016
ICS:
31.040.30 Termistorji Thermistors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60539-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2016
ICS 31.040.30 Supersedes EN 60539-1:2008
English Version
Directly heated negative temperature coefficient thermistors -
Part 1: Generic specification
(IEC 60539-1:2016)
Thermistances à coefficient de température négatif à Direkt geheizte temperaturabhängige Widerstände mit
chauffage direct - Partie 1: Spécification générique negativem Temperaturkoeffizienten -
(IEC 60539-1:2016) Teil 1: Fachgrundspezifikation
(IEC 60539-1:2016)
This European Standard was approved by CENELEC on 2016-06-01. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60539-1:2016 E
European foreword
The text of document 40/2430/FDIS, future edition 3 of IEC 60539-1, prepared by IEC/TC 40
"Capacitors and resistors for electronic equipment" was submitted to the IEC-CENELEC parallel vote
and approved by CENELEC as EN 60539-1:2016.
The following dates are fixed:
(dop) 2017-03-01
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2019-06-01
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 60539-1:2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60539-1:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60027-1 NOTE Harmonized as EN 60027-1.
ISO 80000-1:2009 NOTE Harmonized as EN ISO 80000-1:2013 (not modified).
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60062 -  Marking codes for resistors and EN 60062 -
capacitors
IEC 60068-1 2013 Environmental testing - EN 60068-1 2014
Part 1: General and guidance
IEC 60068-2-1 -  Environmental testing - EN 60068-2-1 -
Part 2-1: Tests - Test A: Cold
IEC 60068-2-2 -  Environmental testing - EN 60068-2-2 -
Part 2-2: Tests - Test B: Dry heat
IEC 60068-2-6 -  Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-11 -  Basic environmental testing EN 60068-2-11 -
procedures -
Part 2-11: Tests - Test Ka: Salt mist
IEC 60068-2-14 -  Environmental testing - EN 60068-2-14 -
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-17 -  Basic environmental testing EN 60068-2-17 -
procedures -
Part 2-17: Tests - Test Q: Sealing
IEC 60068-2-20 -  Environmental testing - EN 60068-2-20 -
Part 2-20: Tests - Test T: Test methods
for solderability and resistance to
soldering heat of devices with leads
IEC 60068-2-21 -  Environmental testing - EN 60068-2-21 -
Part 2-21: Tests - Test U: Robustness of
terminations and integral mounting
devices
IEC 60068-2-27 -  Environmental testing - EN 60068-2-27 -
Part 2-27: Tests - Test Ea and guidance:
Shock
Publication Year Title EN/HD Year
IEC 60068-2-31 -  Environmental testing - EN 60068-2-31 -
Part 2-31: Tests - Test Ec: Rough
handling shocks, primarily for
equipment-type specimens
IEC 60068-2-38 -  Environmental testing - EN 60068-2-38 -
Part 2-38: Tests - Test Z/AD: Composite
temperature/humidity cyclic test
IEC 60068-2-45 1980 Basic environmental testing EN 60068-2-45 1992
procedures -
+ A1 1993 + A1 1993
Part 2-45: Tests - Test XA and
guidance: Immersion in cleaning
solvents
IEC 60068-2-52 -  Environmental testing - EN 60068-2-52 -
Part 2-52: Tests - Test Kb: Salt mist,
cyclic (sodium chloride solution)
IEC 60068-2-54 -  Environmental testing - EN 60068-2-54 -
Part 2-54: Tests - Test Ta: Solderability
testing of electronic components by the
wetting balance method
IEC 60068-2-58 -  Environmental testing - EN 60068-2-58 -
Part 2-58: Tests - Test Td: Test methods
for solderability, resistance to dissolution
of metallization and to soldering heat of
surface mounting devices (SMD)
IEC 60068-2-69 -  Environmental testing - EN 60068-2-69 -
Part 2: Tests - Test Te: Solderability
testing of electronic components for
surface mounting devices (SMD) by the
wetting balance method
IEC 60068-2-78 -  Environmental testing - EN 60068-2-78 -
Part 2-78: Tests - Test Cab: Damp heat,
steady state
IEC 60294 -  Measurement of the dimensions of a EN 60294 -
cylindrical component with axial
terminations
IEC 60717 -  Method for the determination of the EN 60717 -
space required by capacitors and
resistors with unidirectional terminations
IEC 61193-2 -  Quality assessment systems - EN 61193-2 -
Part 2: Selection and use of sampling
plans for inspection of electronic
components and packages
IEC 61249-2-7 -  Materials for printed boards and other EN 61249-2-7 -
interconnecting structures -
Part 2-7: Reinforced base materials,
clad and unclad - Epoxide woven
E-glass laminated sheet of defined
flammability (vertical burning test),
copper-clad
IEC 60539-1 ®
Edition 3.0 2016-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Directly heated negative temperature coefficient thermistors –

Part 1: Generic specification
Thermistances à coefficient de température négatif à chauffage direct –

Partie 1: Spécification générique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.040.30 ISBN 978-2-8322-3307-8

– 2 – IEC 60539-1:2016  IEC 2016
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references. 9
3 Terms and definitions . 10
4 General items . 20
4.1 Units and symbols . 20
4.2 Preferred values and appropriate category . 20
4.2.1 General . 20
4.2.2 Appropriate category . 20
4.3 Marking . 20
4.3.1 General . 20
4.3.2 Marking for small size types such as surface mount thermistors . 21
4.3.3 Coding . 21
4.4 Quality assessment procedures . 21
5 Test and measurement procedures . 21
5.1 General . 21
5.2 Standard atmospheric conditions for testing . 21
5.3 Drying and recovery . 22
5.3.1 Drying . 22
5.3.2 Recovery . 22
5.4 Mounting (for surface mount thermistors only) . 22
5.4.1 General . 22
5.4.2 Substrate and pad . 22
5.4.3 Mounting on board . 22
5.5 Visual examination and check of dimensions . 23
5.5.1 Visual examination . 23
5.5.2 Dimensions . 24
5.6 Zero-power resistance . 24
5.6.1 General . 24
5.6.2 Measurement procedures . 24
5.6.3 Requirements . 24
5.7 B-value or resistance ratio . 25
5.7.1 General . 25
5.7.2 Requirements . 25
5.8 Insulation resistance (for insulated types only) . 25
5.8.1 General . 25
5.8.2 Test methods . 25
5.8.3 Applied voltage . 27
5.8.4 Requirements . 28
5.9 Voltage proof (for insulated types only) . 28
5.9.1 General . 28
5.9.2 Test voltage . 28
5.9.3 Requirements . 28
5.10 Resistance/temperature characteristic . 28
5.10.1 General . 28
5.10.2 Test methods .
...