FprEN IEC 60674-3-1:2026

• Status: Not Published
• Publication Date: 29-Nov-2026
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: CLC/SR 15 - Insulating materials
• Current Stage: 5020 - Vote circulated - Formal Approval
• Start Date: 17-Jul-2026
• Due Date: 31-Mar-2026
• Completion Date: 17-Jul-2026
• Ref Project: kSIST FprEN IEC 60674-3-1:2026 - Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheet 1: Biaxially oriented polypropylene (PP) films for capacitors

• Revises: EN IEC 60674-3-1:2021 - Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheet 1: Biaxially oriented polypropylene (PP) film for capacitors
• Effective Date: 21-Jan-2025

Overview

FprEN IEC 60674-3-1:2026 - "Plastic films for electrical purposes – Part 3: Specifications for individual materials – Sheet 1: Biaxially oriented polypropylene (PP) films for capacitors" is an international standard developed by the International Electrotechnical Commission (IEC) and adopted by CENELEC (CLC). This document specifies the requirements and classification for biaxially oriented polypropylene (PP) films designed for use as dielectric materials in capacitors. The standard addresses essential characteristics such as physical and electrical properties, dimensions, and quality control, providing a basis for uniform quality in the manufacturing and supply of capacitor-grade PP films.

Key Topics

• Material Types and Classification
  The standard classifies polypropylene films according to surface characteristics (smooth or rough) and treatment (untreated or pre-treated for vacuum metallization). It covers three main types:

  • Type 1: Smooth surfaces
  • Type 2: At least one rough surface
  • Type 3: High electric strength for thin films

• Dimensional Requirements

  • Thickness, width, and roll characteristics are specified, referencing standard measurement methods for accuracy and repeatability.
  • Preferred thicknesses are provided for each film type to suit various capacitor applications, ensuring consistency.

• Physical and Electrical Properties

  • Requirements for density, melting point, tensile strength, elongation at break, surface and volume resistivity, dissipation factor, and relative permittivity.
  • Electric strength and the tolerance of electrical weak spots are crucial for ensuring reliability in high-voltage and precision capacitor applications.

• Pre-treatment and Compatibility

  • Corona treatment and pre-treatment on one or both sides facilitate vacuum metallization and compatibility with impregnants used in capacitor manufacturing.
  • Guidelines for assessing compatibility with dielectric fluids and controlling liquid absorption.

• Roll and Labelling Standards

  • Specifications for windability, joins, roll width, core size, and labelling to ensure ease of handling and traceability in manufacturing processes.

Applications

Biaxially oriented polypropylene (PP) films specified by this standard are essential as dielectric materials in various types of capacitors, including:

• AC and DC capacitors
  Used in power electronics, energy storage, and filtering applications, requiring films with high electrical strength and reliability.

• Power factor correction capacitors
  Improved efficiency in electrical distribution systems.

• Pulse and snubber capacitors
  Used in industrial electronics, demanding materials that maintain physical and electrical properties under rapid voltage changes.

• Consumer electronics and automotive capacitors
  The films must meet strict quality and consistency requirements to guarantee product safety and performance in high-volume production.

This standard enables manufacturers and users to specify, test, and purchase films with established electrical and physical performance, supporting increased safety, efficiency, and compatibility across capacitor applications.

Related Standards

For effective implementation and reference, FprEN IEC 60674-3-1:2026 should be used in conjunction with related standards, including:

• IEC 60674-1:1980
  Specification for plastic films for electrical purposes – Part 1: Definitions and general requirements

• IEC 60674-2:2016
  Specification for plastic films for electrical purposes – Part 2: Methods of test

• IEC 60674-3 (all sheets)
  Series overview, covering additional materials and specifications for plastic films in electrical applications

• ISO 1183-2:2019
  Plastics – Methods for determining density

• ISO 11357-3:2018
  Plastics – Determination of temperature and enthalpy of melting and crystallization by DSC

Conclusion

FprEN IEC 60674-3-1:2026 standardizes the requirements for biaxially oriented polypropylene (PP) films in capacitor applications, ensuring high-performance, quality, and compatibility across the global electrical and electronics industry. By following this standard, manufacturers and users can achieve greater reliability, efficiency, and safety in electrical insulation and capacitor production processes, supporting innovation and international trade.

SLOVENSKI STANDARD
oSIST prEN IEC 60674-3-1:2025
01-november-2025
Plastične folije za električne namene - 3. del: Specifikacije za posamezne materiale
- 1. list: Dvoosno orientirane polipropilenske folije za kondenzatorje
Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheet
1: Biaxially oriented polypropylene (PP) films for capacitors
Films plastiques à usages électriques - Partie 3: Spécifications pour matériaux
particuliers - Feuille 1: Films de polypropylène biorienté (PP) pour condensateurs
Ta slovenski standard je istoveten z: prEN IEC 60674-3-1:2025
ICS:
29.035.20 Plastični in gumeni izolacijski Plastics and rubber insulating
materiali materials
83.140.10 Filmi in folije Films and sheets
oSIST prEN IEC 60674-3-1:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60674-3-1:2025
oSIST prEN IEC 60674-3-1:2025
15/1069/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60674-3-1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-09-26 2025-12-19
SUPERSEDES DOCUMENTS:
15/1055/CD, 15/1065A/CC
IEC TC 15 : SOLID ELECTRICAL INSULATING MATERIALS
SECRETARIAT: SECRETARY:
United States of America Mr Solomon Chiang
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

TC 112
ASPECTS CONCERNED:
Electricity transmission and distribution, Electromagnetic Compatibility, Energy Efficiency, Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for Vote
(CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clauses to
be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC clauses.
(SEE AC/22/2007 OR NEW GUIDANCE DOC).
nex A
TITLE:
Plastic films for electrical purposes – Part 3: Specifications for individual materials – Sheet 1: Biaxially oriented
polypropylene (PP) films for capacitors

PROPOSED STABILITY DATE: 2031
NOTE FROM TC/SC OFFICERS:
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oSIST prEN IEC 60674-3-1:2025
IEC CDV 60674-3-1 © IEC 2025
Link to Committee Draft for Vote (CDV) online document:

https://osd.iec.ch/#/editor/archive/2c752e0c-a292-4759-e063-6d13000a4076/en/CCDV/1

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oSIST prEN IEC 60674-3-1:2025
IEC CDV 60674-3-1 © IEC 2025
CONTENTS
FOREWORD . 2
INTRODUCTION . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification . 5
5 Designation . 6
6 General requirements . 6
7 Dimensions . 6
7.1 Thickness . 6
7.2 Width . 6
7.3 Length/diameter . 7
8 Properties . 7
8.1 Physical properties . 7
8.2 Electric strength (DC test) . 8
8.3 Electrical weak spots . 8
8.4 Thermal endurance . 9
8.5 Wetting tension (types 1b + 1c, 2b + 2c and 3b + 3c only) . 9
8.6 Liquid absorption . 9
8.7 Compatibility with impregnants. 10
8.8 Dissipation factor under impregnated conditions . 10
8.9 Space factor . 10
9 Roll characteristics . 10
9.1 Windability . 10
9.2 Joins . 10
9.3 Roll width (overall width) . 11
9.4 Core . 11
9.5 Labelling . 11
Bibliography . 12

Table 1 – Physical properties . 7
Table 2 – Electric strength (DC test) for types 1, 2 and 3 . 8
Table 3 – Electrical weak spots for types 1, 2 and 3 . 9
Table 4 – Maximum number of joins within a roll (types 1, 2 and 3) . 11

oSIST prEN IEC 60674-3-1:2025
IEC CDV 60674-3-1 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Plastic films for electrical purposes –
Part 3: Specifications for individual materials – Sheet 1: Biaxially oriented
polypropylene (PP) films for capacitors

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced
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9) IEC draws attention to the possibility that the implementation of this document may involve
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IEC [had/had not] received notice of (a) patent(s), which may be required to implement this
oSIST prEN IEC 60674-3-1:2025
IEC CDV 60674-3-1 © IEC 2025
document. However, implementers are cautioned that this may not represent the latest
information, which may be obtained from the patent database available at https://patents.iec.ch.
IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60674–3–1 has been prepared by IEC technical committee 15: Solid electrical insulating
materials. It is an International Standard.
This third edition cancels and replaces the second edition published in [publication_date],
Amendment 1:[publication_date] and Amendment 2:[publication_date]. This edition constitutes
a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) this document has been completely revised editorially and technically and included in the
IEC 60674 series of standards;
b) the test methods have been updated to reflect today’s state of the art.
The text of this International Standard is based on the following documents:
Draft Report on voting
15/XX/CDV 15/XX/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at http://www.iec.ch/members_experts/refdocs. The main document types developed by IEC
are described in greater detail at http://www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 60674 series, published under the general title Plastic films for
electrical purposes, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under http://webstore.iec.ch in the data related to
the specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
oSIST prEN IEC 60674-3-1:2025
IEC CDV 60674-3-1 © IEC 2025
INTRODUCTION
This standard is one of a series which deals with plastic films for electrical purposes. The series
will consist of three parts:
Part 1: Definitions and general requirements (IEC 60674–1:1980);
Part 2: Methods of test (IEC 606
...