prEN IEC 60115-4:2024

Fixed resistors for use in electronic equipment - Part 4: Sectional specification: Power resistors for through hole assembly on circuit boards (THT) or for assembly on chassis

This part of IEC 60115 is applicable to fixed power resistors for use in electronic equipment. This standard relates to resistors having a rated dissipation typically greater than 1W up to and including 1000W for use in electronic equipment. This standard is applicable to fixed power resistors with a maximum surface temperature (MET) higher than the preferred upper category temperature (UCT) of 200°C. These resistors are typically described according to types (different geometric shapes) and styles (different dimensions) and product technology. The resistive element of these resistors is typically - protected by a conformal lacquer coating or - cement coating or - vitreous enamel or - a ceramic body or - any other housing, which is to be described in the relevant specification. The electrical connection of these resistors is typically achieved by means of - lead wire terminations or - punched terminals or lug terminals or - push on terminals or - screw terminals or - any other termination, which is to be described in the relevant specification In special cases, a heat sink may be applicable but not mandatory. The object of this standard is to prescribe 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. Test severities and requirements prescribed in detail specifications referring to this sectional specification shall be of equal or higher performance level, because lower performance levels are not permitted. 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 60115-4:2022 as a European standard. The standard shall be published together with the finalised Common Modifications.

Résistances fixes utilisées dans les équipements électroniques - Partie 4: Spécification intermédiaire: Résistances de puissance pour assemblage par trous traversants sur cartes de circuit imprimé (carte THT) ou pour assemblage sur châssis

L’IEC 60115-4:2022 couvre les résistances ayant un pouvoir de dissipation assignée généralement supérieur à 1 W et pouvant atteindre 1 000 W, qui sont utilisées dans les équipements électroniques. Le présent document s’applique aux résistances de puissance fixes, dont la température de surface maximale (qui correspond à la MET) est supérieure à la température maximale de catégorie (UCT) préférentielle de 200 °C. NOTE Les résistances à radiateur, c’est-à-dire les résistances dont le fonctionnement impose qu’elles soient montées sur un radiateur réservé, en raison de leurs conditions de température particulières, sont couvertes par une spécification intermédiaire qui leur est réservée (à l’étude à la date de publication du présent document). Ces résistances sont généralement décrites selon des types (différentes formes géométriques), des modèles (différentes dimensions) et des technologies de produit. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) adoption des définitions des technologies de produit et des niveaux de classification des produits de la spécification générique, IEC 60115-1:2020; b) amendement en 4.2 d’une base pour la spécification facultative de l’excentricité des broches, pour les résistances à broches axiales; c) intégration en 5.3.9, en tant que méthode d’essai par défaut, de l’"essai de surcharge haute tension à impulsions périodiques" donné dans l’IEC 60115‑1:2020, 8.3, entraînant le d) remplacement de l’ancien "essai de surcharge à impulsions périodiques" donné dans l’IEC 60115-1:2020, 8.4; d) intégration en 5.3.22 et 5.3.23 de la révision de l’essai de brasabilité de l’IEC 60115-1:2020, 11.1; e) intégration en 5.3.25 de l’essai de résistance au solvant combiné de l’IEC 60115-1:2020, 11.3; f) refonte et intégration en 5.3.5 de l’essai d’endurance à température ambiante de l’IEC 60115-1:2020, 7.2; g) ajout de la forme d’ondes des impulsions 1,2/50, spécifiée en 5.4.1, comme variante facultative en 5.3.8 à l’"essai de surcharge haute tension à une seule impulsion" donné dans l’IEC 60115-1:2020, 8.2, appliqué avec la forme d’ondes des impulsions 10/700; h) intégration en tant qu’essais facultatifs des essais climatiques relatifs au "fonctionnement à basse température" de l’IEC 60115-1:2020, 10.2, et à "chaleur humide, essai continu, accéléré" de l’IEC 60115-1:2020, 10.5, respectivement en 5.4.5 et 5.4.6; i) ajout d’un essai facultatif d’inflammabilité en 5.4.8; j) ajout de nouvelles recommandations en 6.2 sur la présentation des exigences de stabilité, ainsi que leurs écarts absolus et relatifs admis; k) ajout de critères d’acceptation pour l’examen visuel en 6.5 et à l’Annexe B; l) ajout d’un examen visuel pour l’emballage principal et l’emballage de proximité en 6.5.3 et en 7.2; m) ajout de l’évaluation périodique des revêtements des sorties comme nouveau sujet de l’évaluation de la qualité en 9.8; n) application de la numérotation corrigée des articles sur les essais de l’IEC 60115-1:2020; o) ajout d’une nouvelle Annexe C pour synthétiser les exigences relatives à la qualité d’exécution pour l’assemblage de résistance de puissance à broches, par exemple celles données dans l’ancienne série de normes IEC 61192; p) amendement de l’Annexe F informative sur les modèles à broches orientées radialement, en y intégrant des informations sur un modèle à courbure en Z, pour montage en surface; q) ajout de l’Annexe X informative pour présenter

Stalni upori za elektronsko opremo - 4. del: Področna specifikacija: Močnostni upori za montažo skozi prehodne luknje tiskanih vezij ali za pritrditev na šasijo

General Information

• Status: Not Published
• Publication Date: 16-Nov-2025
• ICS: 31.040.10 - Fixed resistors
• Technical Committee: CLC/TC 40XB - CLC/TC 40XB
• Current Stage: 4020 - Enquiry circulated - Enquiry
• Start Date: 04-Oct-2024
• Due Date: 01-May-2024
• Completion Date: 04-Oct-2024
• Ref Project: oSIST prEN IEC 60115-4:2024 - Fixed resistors for use in electronic equipment - Part 4: Sectional specification: Power resistors for through hole assembly on circuit boards (THT) or for assembly on chassis

Relations

• Amended By: prEN IEC 60115-4:2024/prAA:2024 - Fixed resistors for use in electronic equipment - Part 4: Sectional specification: Power resistors for through hole assembly on circuit boards (THT) or for assembly on chassis
• Effective Date: 17-Oct-2023
• Revises: EN 140200:1996/A1:2001 - Sectional Specification: Fixed power resistors
• Effective Date: 13-Aug-2024
• Revises: EN 140200:1996 - Sectional Specification: Fixed power resistors
• Effective Date: 13-Aug-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2024
Stalni upori za elektronsko opremo - 4. del: Področna specifikacija: Močnostni
upori za montažo skozi prehodne luknje tiskanih vezij ali za pritrditev na šasijo
Fixed resistors for use in electronic equipment - Part 4: Sectional specification: Power
resistors for through hole assembly on circuit boards (THT) or for assembly on chassis
Résistances fixes utilisées dans les équipements électroniques - Partie 4: Spécification
intermédiaire: Résistances de puissance pour assemblage par trous traversants sur
cartes de circuit imprimé (carte THT) ou pour assemblage sur châssis
Ta slovenski standard je istoveten z: prEN IEC 60115-4:2024
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 60115-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2024
ICS 31.040.10 Will supersede EN 140200:1996; EN
140200:1996/A1:2001
English Version
Fixed resistors for use in electronic equipment - Part 4: Sectional
specification: Power resistors for through hole assembly on
circuit boards (THT) or for assembly on chassis
(IEC 60115-4:2022)
To be completed To be completed
(IEC 60115-4:2022) (IEC 60115-4:2022)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2024-12-27.

The text of this draft consists of the text of IEC 60115-4:2022 (40/2920/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: 78798 Ref. No. prEN IEC 60115-4:2024 E

European foreword
This document (prEN IEC 60115-4:2024) consists of the text of document IEC 60115-4:2022, 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 140200:1996 and all of 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,
IEC 60115-1:2020, have been adopted;
c) a basis for the optional specification of the lead eccentricity of axial leaded resistors has been
amended in 4.2;
d) the ‘period-pulse high-voltage overload test’ of IEC 60115-1:2020, 8.3 has been adopted as default
test method in 5.3.9, thereby replacing the legacy test ‘periodic-pulse overload test if
IEC 60115-1:2020, 8.4;
e) the revised solderability test of IEC 60115-1:2020, 11.1 has been adopted in 5.3.22 and 5.3.23;
f) the combined solvent resistance test of IEC 60115-1:2020, 11.3 has been adopted in in 5.3.25;
g) the ‘endurance at room temperature test’ of IEC 60115-1:2020, 7.2 has been reworked and adopted
in 5.3.5;
h) the ‘single-pulse high-voltage overload test’ of IEC 601115-1:2020, 8.2, applied with the pulse
shape 10/700 in 5.3.8, is complemented with the optional alternative provided by the pulse shape
1,2/50;
i) climatic tests for ‘operation at low temperature’ of IEC 60115-1:2020, 10.2, and for ‘damp heat,
steady state, accelerated’ of IEC 60115-1:2020, 10.4, have been adopted as optional tests in 5.4.5.
and 5.4.6, respectively;
j) inclusion of an optional flammability test as 5.4.8;
k) new guidance is provided in 6.2 on the presentation of stability requirements with their permissible
absolute and relative deviations;
l) acceptance criteria for the visual inspection have been added in 6.5 and in Annex B;
m) visual inspection for the primary and proximity packaging has been added in 6.5.3 and in 7.2
n) the periodical evaluation of termination platings has been added as a new topic of quality
assessment in 9.8;
o) a new Annex C has been added to summarize workmanship requirements for the assembly of
leaded power resistors, e.g. as given in the prior IEC 61192 series of standards;
p) the informative Annex F on radial formed styles has been amended with details on a formed Z-bend
style for surface-mount assembly;
q) furthermore, this edition cancels and replaces the old CECC based EN edition published in 1996
and constitutes revisions related to tables and figures. (see Annex X)
Preceding documents on the subject covered by this specification have been:
— EN 140200:1996 + EN 140200:1996/A1:2001
— CECC 40 200:1981-00, 1973-00

IEC 60115-4 ®
Edition 3.0 2022-11
INTERNATIONAL
STANDARD
colour
inside
Fixed resistors for use in electronic equipment –

Part 4: Sectional specification: Power resistors for through hole assembly on

circuit boards (THT) or for assembly on chassis

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.040.10 ISBN 978-2-8322-6088-3

– 2 – IEC 60115-4:2022 © IEC 2022
CONTENTS
FOREWORD . 8
1 Scope . 11
2 Normative references . 11
3 Terms, definitions, product types, product technologies and product classification. 12
3.1 Terms and definitions . 12
3.2 Product types . 13
3.2.1 General . 13
3.2.2 Axial type . 13
3.2.3 Radial type . 13
3.2.4 Vertical type . 14
3.2.5 Tubular types . 14
3.2.6 Metal housed wire-wound resistors . 15
3.2.7 Any other type . 15
3.3 Resistor encapsulation and material of termination . 15
3.3.1 Conformal lacquer coat . 15
3.3.2 Silicone cement coating . 15
3.3.3 Enamel coating . 16
3.3.4 Ceramic housed resistor . 16
3.3.5 Wire termination . 16
3.4 Product technologies . 16
3.4.1 General . 16
3.4.2 Metal film technology . 17
3.4.3 Metal glaze technology . 17
3.4.4 Metal oxide technology . 17
3.4.5 Wire-wound technology . 17
3.4.6 Metal strip technology . 17
3.4.7 Any other technology . 18
3.5 Product classification . 18
4 Preferred characteristics . 18
4.1 General . 18
4.2 Preferred types, styles and dimensions . 18
4.2.1 Axial type . 18
4.2.2 Ceramic housed type with axial lead wires . 22
4.2.3 Ceramic housed type with radial lead wires . 23
4.2.4 Radial or vertical ceramic housed type and dimensions . 25
4.2.5 Tubular type of power resistors . 26
4.2.6 Other types . 27
4.3 Preferred climatic categories . 27
4.4 Resistance . 28
4.5 Tolerances on resistance . 28
4.6 Rated dissipation P . 28
r
4.7 Limiting element voltage U . 30
max
4.8 Insulation voltage U . 30
ins
4.9 Insulation resistance R . 30
ins
5 Tests and test severities . 30
5.1 General provisions for tests invoked by this specification . 30

IEC 60115-4:2022 © IEC 2022 – 3 –
5.2 Preparation of specimen . 31
5.2.1 Drying . 31
5.2.2 Mounting of power resistors on test boards . 31
5.2.3 Mounting of power resistors on test racks . 32
5.2.4 Specification of test boards/ racks for any other type of high-power

resistors . 34
5.3 Details of applicable tests . 34
5.3.1 Resistance . 34
5.3.2 Temperature coefficient of resistance . 34
5.3.3 Temperature rise . 35
5.3.4 Endurance at the rated temperature 70 °C . 35
5.3.5 Endurance
...