EN 60738-1-2:2008

SLOVENSKI STANDARD
01-julij-2008
1DGRPHãþD
SIST EN 60738-1-2:2002
Termistorji - Neposredno ogrevani s stopenjskim pozitivnim temperaturnim
koeficientom - 1-2. del: Okvirna podrobna specifikacija - Uporaba za grelni element
- Nivo ocenjevanja EZ (IEC 60738-1-2:2008)
Thermistors - Directly heated positive step-function temperature coefficient - Part 1-2:
Blank detail specification - Heating element application - Assessment level EZ (IEC
60738-1-2:2008)
Thermistoren - Direkt geheizte temperaturabhängige Widerstände mit positivem
Temperaturkoeffizienten - Teil 1-1: Vordruck für Bauartspezifikation: Anwendung als
Strombegrenzer Qualitätsbewertungsstufe EZ (IEC 60738-1-2:2008)
Thermistances à basculement à coefficient de température positif à chauffage direct -
Partie 1-2: Spécification particulière cadre - Application de l'élément chauffant - Niveau
d'assurance de la qualité EZ (CEI 60738-1-2:2008)
Ta slovenski standard je istoveten z: EN 60738-1-2:2008
ICS:
31.040.30 Termistorji Thermistors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60738-1-2
NORME EUROPÉENNE
April 2008
EUROPÄISCHE NORM
ICS 31.040.30 Supersedes EN 60738-1-2:1999

English version
Thermistors -
Directly heated positive step-function temperature coefficient -
Part 1-2: Blank detail specification -
Heating element application -
Assessment level EZ
(IEC 60738-1-2:2008)
Thermistances à basculement Thermistoren -
à coefficient de température positif Direkt geheizte temperaturabhängige
à chauffage direct - Widerstände mit positivem
Partie 1-2: Spécification particulière Temperaturkoeffizienten -
cadre - Teil 1-2: Vordruck für Bauartspezifikation -
Application de l'élément chauffant - Anwendung als Heizelement -
Niveau d'assurance de la qualité EZ Bewertungsstufe EZ
(CEI 60738-1-2:2008) (IEC 60738-1-2:2008)

This European Standard was approved by CENELEC on 2008-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60738-1-2:2008 E
Foreword
The text of document 40/1875/FDIS, future edition 2 of IEC 60738-1-2, prepared by IEC TC 40,
Capacitors and resistors for electronic equipment, was submitted to the IEC-CENELEC parallel vote and
was approved by CENELEC as EN 60738-1-2 on 2008-03-01.
This European Standard supersedes EN 60738-1-2:1999.
specification EN 60738-1.
This standard is to be used in conjunction with EN 60738-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60738-1-2:2008 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60738-1-2:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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 the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1) 2)
IEC 60068-2-58 - Environmental testing - EN 60068-2-58 2004
Part 2-58: Tests - Test Td: Test methods for + corr. December 2004
solderability, resistance to dissolution of
metallization and to soldering heat of surface
mounting devices (SMD)
IEC 60410 1973 Sampling plans and procedures for inspection - -
by attributes
IEC 60738-1 2006 Thermistors - Directly heated positive EN 60738-1 2006
temperature coefficient -
Part 1: Generic specification
1)
Undated reference.
2)
Valid edition at date of issue.

IEC 60738-1-2
Edition 2.0 2008-02
INTERNATIONAL
STANDARD
QC 440002
Thermistors – Directly heated positive step-function temperature coefficient –
Part 1-2: Blank detail specification – Heating element application – Assessment
level EZ
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
M
ICS 31.040.30 ISBN 2-8318-9574-X

– 2 – 60738-1-2 © IEC:2008(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
THERMISTORS –
DIRECTLY HEATED POSITIVE STEP-FUNCTION
TEMPERATURE COEFFICIENT –
Part 1-2: Blank detail specification –
Heating element application –
Assessment level EZ
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60738-1-2 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This second edition cancels and replaces the first edition issued in 1998. It constitutes a
technical revision.
This edition contains changes with respect to the referenced subclauses of the revised generic
specification IEC 60738-1.
This publication is to be read in conjunction with IEC 60738-1.

60738-1-2 © IEC:2008(E) – 3 –
The text of this standard is based on the following documents:
FDIS Report on voting
40/1875/FDIS 40/1892/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.
The QC number that appears on the front cover of this publication is the specification number
in the IEC Quality Assessment System for Electronic Components (IECQ).
The list of all parts of the IEC 60738 series, under the (new) general title Thermistors – Directly
heated positive step-function temperature coefficient, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. 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.

– 4 – 60738-1-2 © IEC:2008(E)
INTRODUCTION
Blank detail specification
A blank detail specification is a supplementary document to the generic specification and
contains requirements for style and layout and minimum content of detail specifications. Detail
specifications not complying with these requirements shall not be considered as being in
accordance with IEC specifications nor shall they so be described.
In the preparation of detail specifications the content of IEC 60738-1:2006, 1.4 shall be taken
into account.
The numbers between brackets on the first page correspond to the following information which
shall be inserted in the position indicated.
Identification of the detail specification
[1] The "International Electrotechnical Commission" or the National Standards Organization
under whose authority the detail specification is drafted.
[2] The IEC or National Standards number of the detail specification, date of issue and any
further information required by the national system.
[3] The number and issue number of the IEC or national generic specification.
[4] The IEC number of the blank detail specification.
Identification of the thermistor
[5] A short description of the type of thermistor.
[6] Information on typical construction (if applicable).
NOTE When the thermistor is not designed for use on printed boards, this should clearly be stated in the detail
specification in this position.
[7] Outline drawing with main dimensions which are of importance for interchangeability
and/or reference to the national or international documents for outlines. Alternatively, this
drawing may be given in an annex to the detail specification.
[8] Application or group of applications covered and/or assessment level.
[9] Reference data on the most important properties, to allow comparison between the various
thermistor types.
60738-1-2 © IEC:2008(E) – 5 –
[1] IEC 60738-1-2-XXX [2]
QC 440002
ELECTRONIC COMPONENTS OF ASSESSED IEC 60738-1-2 [4]
QUALITY IN ACCORDANCE WITH: QC 440002

[3] DIRECTLY HEATED POSITIVE
STEP-FUNCTION TEMPERATURE
COEFFICIENT THERMISTORS [5]
Outline drawing: [see 1.2] FOR HEATING ELEMENT
[. angle projection] APPLICATION

MODIFIED FERRO-ELECTRIC [6]
[7] CERAMIC MATERIAL
[Other shapes are permitted within the dimensions given]
Assessment level: EZ [8]
[9]
Information on the availability of components
qualified to this detail specification is given in
the Register of Approvals.
– 6 – 60738-1-2 © IEC:2008(E)
THERMISTORS –
DIRECTLY HEATED POSITIVE STEP-FUNCTION
TEMPERATURE COEFFICIENT –
Part 1-2: Blank detail specification –
Heating element application –
Assessment level EZ
1 General data
1.1 Method(s) of mounting (to be inserted)
(See IEC 60738-1:2006, 7.30).
1.2 Dimensions
(All dim
...