oSIST prEN IEC 60115-8:2024

Fixed resistors for use in electronic equipment - Part 8: Sectional specification - Fixed surface mount resistors

This part of IEC 60115 is applicable to fixed surface mount resistors for use in electronic equipment.
These resistors are typically described according to types (different geometric shapes) and styles (different dimensions)
and product technology. These resistors have metallized terminations and are primarily intended to be mounted directly
onto a circuit board.
The object of this document is to specify preferred ratings and characteristics and to select from IEC 60115-1, the
appropriate quality assessment procedures, tests and measuring methods and to give general performance requirements
for this type of resistor.
Since the documents of the 60115-X series are exempted from the parallel procedure (D162/C089), this New Work Item
Proposal aims to endorse the main IEC document IEC 60115-8:2023 as a European standard. The standard shall be
published together with the finalised Common Modifications.

Festwiderstände zur Verwendung in Geräten der Elektronik - Teil 8: Rahmenspezifikation - Oberflächenmontierbare (SMD) Festwiderstände

Résistances fixes utilisées dans les équipements électroniques - Partie 8: Spécification intermédiaire - Résistances fixes pour montage en surface

L’IEC 60115-8:2023 s’applique aux résistances fixes pour montage en surface utilisées dans les équipements électroniques.
Ces résistances sont généralement décrites selon des types (différentes formes géométriques), des modèles (différentes dimensions) et des technologies de produits. Ces résistances comportent des sorties métalliques et sont conçues principalement pour être montées directement sur un circuit imprimé.
Le présent document a pour objet de spécifier les caractéristiques assignées et les caractéristiques préférentielles, de choisir dans l’IEC 60115-1 les procédures d’assurance de la qualité et les méthodes d’essai et de mesure appropriées, et de fixer les exigences de performance générales pour ce type de résistance.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) adoption des définitions des technologies de produits et des niveaux de classification des produits de la spécification générique, IEC 60115-1:2020;
b) ajout d’un nouveau modèle de résistances transversales (RT) en 3.1.5 et 4.2.2 afin de couvrir les résistances à larges sorties qui sont devenues courantes sur le marché;
c) révision des cartes d’essai recommandées en 5.2.2 pour répondre aux demandes du marché d’une dissipation assignée supérieure dans les résistances;
d) révision des cartes d’essai pour pouvoir les placer à la verticale et non pas à l’horizontale pendant les essais spécifiés dans le but d’optimiser la stabilité de l’augmentation de température, la surface et l’espacement à l’intérieur de la chambre d’essai;
e) ajout de "l’essai de surcharge haute tension à impulsions périodiques" de l’IEC 60115‑1:2020, 8.3 à la méthode d’essai par défaut en 5.3.8, toutefois l’ancienne méthode d’essai, "essai de surcharge à impulsions périodiques" de l’IEC 60115‑1:2020, 8.4, est maintenue pour les produits historiques;
et plus. Veuillez consulter l'avant-propos pour la liste des modifications.

Stalni upori za elektronsko opremo - 8. del: Področna specifikacija - Fiksni upori za površinsko montažo

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Dec-2024
• ICS: 31.040.10 - Fixed resistors
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 16-Oct-2024
• Due Date: 05-Mar-2025
• Ref Project: prEN IEC 60115-8:2024 - Fixed resistors for use in electronic equipment - Part 8: Sectional specification - Fixed surface mount resistors

Relations

• Amended By: oSIST prEN IEC 60115-8:2024/oprAA:2024 - Fixed resistors for use in electronic equipment - Part 8: Sectional specification - Fixed surface mount resistors
• Effective Date: 16-Jan-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2024
Stalni upori za elektronsko opremo - 8. del: Področna specifikacija - Fiksni upori
za površinsko montažo
Fixed resistors for use in electronic equipment - Part 8: Sectional specification - Fixed
surface mount resistors
Festwiderstände zur Verwendung in Geräten der Elektronik - Teil 8:
Rahmenspezifikation - Oberflächenmontierbare (SMD) Festwiderstände
Résistances fixes utilisées dans les équipements électroniques - Partie 8: Spécification
intermédiaire - Résistances fixes pour montage en surface
Ta slovenski standard je istoveten z: prEN IEC 60115-8:2024
ICS:
31.040.10 Fiksni upor Fixed resistors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 60115-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2024
ICS 31.040.10 Will supersede EN 60115-8:2012
English Version
Fixed resistors for use in electronic equipment - Part 8: Sectional
specification - Fixed surface mount resistors
(IEC 60115-8:2023)
Résistances fixes utilisées dans les équipements Festwiderstände zur Verwendung in Geräten der Elektronik
électroniques - Partie 8: Spécification intermédiaire - - Teil 8: Rahmenspezifikation - Oberflächenmontierbare
Résistances fixes pour montage en surface (SMD) Festwiderstände
(IEC 60115-8:2023) (IEC 60115-8:2023)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2025-01-03.

The text of this draft consists of the text of IEC 60115-8:2023 (40/2973/CDV).

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 79287 Ref. No. prEN IEC 60115-8:2024 E

European foreword
This document (prEN IEC 60115-8:2024) consists of the text of document IEC 60115-8:2023, prepared
by IEC/TC 40 "Capacitors and resistors for electronic equipment".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dor + 6 months
has to be announced at national level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
This document will supersede EN 60115-8:2012 and all its amendments and corrigenda (if any).
This edition contains the following significant technical changes with respect to the previous edition:
a) this edition employs a new document structure of the generic specification EN 60115-1:2023, where
the tests of prior Clause 4 are given in Clauses 6 to 12 now;
b) the definitions of product technologies and product classification levels of the generic specification,
EN 60115-1:2023, have been adopted;
c) the preferred styles and their respective dimensions given in Tables 1a and 1b have been reviewed
and amended for the presentation of styles and dimensions for rectangular (RR), transverse (RT),
and cylindrical (RC) shapes, plus special styles and dimensions for SMD wirewound (RW) resistors
in Tables 1 through 4;
d) the specifications of recommended test boards have been reviewed and amended to support the
preferred styles RR, RT and RC in 5.2.2.2, with supporting information on the measurement of
temperature rise given in Annex F and Annex G;
e) the ‘periodic-pulse high-voltage overload test’ of EN 60115-1:2023, 8.3 has been adopted as default
test method in 5.3.8, thereby replacing the legacy test ‘periodic-pulse overload test’ of EN 60115-
1:2023, 8.4;
f) the revised solderability test of EN 60115-1:2023, 11.1 has been adopted in 5.3.21 and 5.3.22;
g) the combined solvent resistance test of EN 60115-1:2023, 11.3 has been adopted in in 5.3.24;
h) the ‘single-pulse high-voltage overload test’ of EN 60115-1:2023, 8.2, applied with the pulse shape
10/700 in 5.3.7, is complemented with the optional alternative provided by the pulse shape 1,2/50
in 5.4.1;
i) climatic tests for ‘operation at low temperature’ of EN 60115-1:2023, 10.2, and for ‘damp heat,
steady state, accelerated’ of EN 60115-1:2023, 10.5, have been adopted as optional tests in 5.4.3.
and 5.4.4, respectively;
prEN IEC 60115-2:2024 (E)
j) new guidance is provided in 6.2 on the presentation of stability requirements with their permissible
absolute and relative deviations;
k) acceptance criteria for the visual examination have been added in 6.5 and in Annex B;
l) visual examination for the primary and proximity packaging has been added in 6.5.3 and in 7.2
m) the periodical evaluation of termination platings has been added as a new topic of quality
assessment in 9.8;
n) a new Annex C has been added to summarize workmanship requirements for the assembly of
leaded film resistors, e.g. as given in the prior IEC 61192 series of standards;
Preceding documents on the subject covered by this specification have been:
— EN 140400:2003, EN 140400:1996 + EN 140400:1996/A1:2001 + EN 140400:1996/COR:1997-07
— CECC 40 400:1989-00.
IEC 60115-8 ®
Edition 3.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fixed resistors for use in electronic equipment –

Part 8: Sectional specification: Fixed surface mount resistors

Résistances fixes utilisées dans les équipements électroniques –

Partie 8: Spécification intermédiaire: Résistances fixes pour montage en surface

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.040.10  ISBN 978-2-8322-7437-8

– 2 – IEC 60115-8:2023 © IEC 2023
CONTENTS
FOREWORD . 8
1 Scope . 11
2 Normative references . 11
3 Terms, definitions, product technologies and product classification . 12
3.1 Terms and definitions . 12
3.2 Product technologies . 12
3.3 Product classification . 13
4 Preferred characteristics . 13
4.1 General . 13
4.2 Style and dimensions . 13
4.2.1 Preferred styles and outline dimensions for rectangular (RR) resistors . 13
4.2.2 Preferred styles and outline dimensions for transverse (RT) resistors . 14
4.2.3 Preferred styles and outline dimensions for cylindrical (RC) resistors . 15
4.2.4 Preferred styles and outline dimensions for wire-wound (RW) resistors . 16
4.3 Preferred climatic categories . 17
4.4 Resistance . 17
4.5 Tolerances on resistance . 17
4.6 Rated dissipation P . 17
4.7 Limiting element voltage U . 18
max
4.8 Insulation voltage U . 18
ins
4.9 Insulation resistance R . 18
ins
5 Tests and test severities . 18
5.1 General provisions for tests invoked by this document . 18
5.2 Preparation of specimens . 19
5.2.1 Drying . 19
5.2.2 Mounting of components on test boards . 19
5.3 Tests . 25
5.3.1 Resistance . 25
5.3.2 Temperature coefficient of resistance . 25
5.3.3 Temperature rise . 26
5.3.4 Endurance at the rated temperature 70 °C . 26
5.3.5 Endurance at a maximum temperature: UCT . 26
5.3.6 Short-term overload . 27
5.3.7 Single-pulse high-voltage overload test . 27
5.3.8 Periodic-pulse high-voltage overload test . 28
5.3.9 Electrostatic discharge (ESD) test . 29
5.3.10 Visual examination . 29
5.3.11 Gauging of dimensions . 29
5.3.12 Detail dimensions . 30
5.3.13 Shear (adhesion) test . 30
5.3.14 Substrate bending test . 30
5.3.15 Shock . 31
5.3.16 Vibration . 31
5.3.17 Rapid change of temperature . 31
5.3.18 Rapid change of temperature, ≥ 100 cycles . 31
5.3.19 Climatic sequence . 31

IEC 60115-8:2023 © IEC 2023 – 3 –
5.3.20 Damp heat, steady state . 32
5.3.21 Solderability, with lead-free solder . 33
5.3.22 Solderability, with SnPb solder . 33
5.3.23 Resistance to soldering heat . 34
5.3.24 Solvent resistance . 34
5.3.25 Insulation resistance . 34
5.3.26 Voltage proof . 34
5.3.27 Flammability test . 35
5.4 Optional and/or
...