prEN IEC 60068-2-67:2026

• Status: Not Published
• Publication Date: 29-Nov-2027
• ICS: 19.040 - Environmental testing
• Technical Committee: CLC/SR 104 - Environmental conditions, classification and methods of test
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 31-Jul-2026
• Completion Date: 31-Jul-2026
• Ref Project: oSIST prEN IEC 60068-2-67:2026 - Environmental testing - Part 2-67: Tests - Test Cy: Damp heat, steady state, accelerated test primarily intended for components

• Referred By: EN IEC 60068-2-30:2025 - Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
• Effective Date: 12-May-2026
• Revises: EN 60068-2-67:1996/A1:2019 - Environmental testing - Part 2-67: Tests - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
• Effective Date: 03-Jun-2025
• Revises: EN 60068-2-67:1996 - Environmental testing - Part 2: Tests - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
• Effective Date: 03-Jun-2025

Overview

prEN IEC 60068-2-67:2026 is a draft international standard developed by CLC and IEC, specifying methods for accelerated environmental testing of small electrotechnical products and components under prolonged damp heat conditions. Referred to as Test Cy, this procedure is primarily intended for non-hermetically sealed components to assess their resistance to damp heat without inducing condensation. Accelerated testing according to this standard helps manufacturers evaluate component durability and reliability in environments characterized by high humidity and steady temperature over extended periods.

Key Topics

• Accelerated Damp Heat Test (Test Cy):
  Focuses on exposing components to a controlled, steady-state environment with high humidity and temperature for up to 2,000 hours. The procedure aims to simulate and accelerate real-world environmental stresses.

• Test Chamber Requirements:
  The standard outlines clear requirements for the construction and operation of the environmental test chamber, including:

  • Uniform temperature and humidity distribution,
  • Prevention of condensation on specimens,
  • Usage of distilled or deionized water for humidification.

• Pre-conditioning and Testing Procedures:
  Components must undergo pre-conditioning to prevent condensation before the test cycle begins. The standard specifies stabilization periods, humidity and temperature ranges, and duration options to suit various component types and applications.

• Specimen Handling and Mounting:
  Guidance is provided on correct specimen placement, mounting structures, and precautions to minimize contamination and self-heating.

• Measurements and Reporting:
  Prescribes initial, intermediate, and final inspections and measurements (visual, electrical, and mechanical), as well as comprehensive information required for test reports to ensure traceability and repeatability.

Applications

prEN IEC 60068-2-67:2026 offers practical value for manufacturers and testing laboratories involved in the qualification and reliability assessment of electronic and electrical components, especially those used in high-humidity environments. Common applications include:

• Quality Assurance:
  Evaluating component resistance to humidity-induced degradation such as moisture ingress and water vapor penetration, which can impact the lifespan and function of non-hermetically sealed products.

• Product Development and Qualification:
  Early identification of failure modes related to damp heat in semiconductors, plastic encapsulated components, and other sensitive devices-crucial for reliability engineering and product improvement.

• Conformity Assessment:
  Supporting third-party laboratories and end users in verifying compliance with international quality and performance expectations for electrotechnical products.

• Failure Analysis:
  Test results help determine the physical significance of moisture-induced failure mechanisms, aiding in root cause analysis and corrective actions.

Related Standards

Testing in accordance with prEN IEC 60068-2-67:2026 is part of the broader IEC 60068 series dedicated to environmental testing. Relevant related standards include:

• IEC 60068-1:
  Environmental testing - Part 1: General and guidance

• IEC 60068-3-4:
  Supporting documentation for damp heat tests

• IEC 60068-3-6:
  Confirmation of the performance of temperature/humidity chambers

• IEC 60068-3-7:
  Measurements in temperature chambers for cold and dry heat tests

These documents provide additional guidance for test method selection, equipment validation, and measurement procedures, ensuring a consistent approach to environmental testing and quality assurance.

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For laboratories and product manufacturers, adopting prEN IEC 60068-2-67:2026 ensures rigorous assessment under accelerated damp heat conditions, providing confidence in component reliability and supporting international market access.

SLOVENSKI STANDARD
01-junij-2026
Okoljsko preskušanje - 2-67. del: Preskusi - Preskus Cy: Pospešeno preskušanje z
vlažno vročino, v ustaljenem stanju, predvideno predvsem za komponente
Environmental testing - Part 2-67: Tests - Test Cy: Damp heat, steady state, accelerated
test primarily intended for components
Essai d'environnement - Partie 2-67: Essais - Essai cy: Essai continu de chaleur humide,
essai accéléré applicable en premier lieu aux composants
Ta slovenski standard je istoveten z: prEN IEC 60068-2-67:2026
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

104/1178/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60068-2-67 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-05-08 2026-07-31
SUPERSEDES DOCUMENTS:
104/1134/CD, 104/1162/CC
IEC TC 104 : ENVIRONMENTAL CONDITIONS, CLASSIFICATION AND METHODS OF TEST
SECRETARIAT: SECRETARY:
Sweden Mr Joakim Grafström
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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TITLE:
Environmental testing - Part 2-67: Tests - Test Cy: Damp heat, steady state, accelerated test
primarily intended for components

PROPOSED STABILITY DATE: 2032
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IEC CDV 60068-2-67 © IEC 2026
CONTENTS
CONTENTS . 3
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General test procedure . 6
4.1 General . 6
4.2 Description of test chamber . 7
4.2.1 Test chamber . 7
4.2.2 Humidifying water . 7
4.3 Severity . 8
4.4 Pre-conditioning . 8
4.5 Testing procedure . 9
4.6 Recovery procedure . 9
5 Measurements . 9
5.1 Initial measurements . 9
5.2 Intermediate measurements . 9
5.3 Final measurements. 9
6 Information to be given in the relevant specification . 10
7 Information to be given in the test report . 10
Annex A (informative) Test apparatus and handling . 11
A.1 Bias voltage . 11
A.2 Selection of materials . 11
A.3 Cleaning . 11
Annex B (informative) Physical significance of the test . 12
Bibliography . 13

Table 1 – Severities of Test Cy . 8

IEC CDV 60068-2-67 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Environmental testing -
Part 2-67: Tests - Test Cy: Damp heat, steady state, accelerated test
primarily intended for components

FOREWORD
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standardization comprising all national electrotechnical committees (IEC National Committees).
The object of IEC is to promote international co-operation on all questions concerning
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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) IEC draws attention to the possibility that the implementation of this document may involve
the use of (a) patent(s). IEC takes no position concerning the evidence, validity or applicability
of any claimed patent rights in respect thereof. As of the date of publication of this document,
IEC had not received notice of (a) patent(s), which may be required to implement this document.
IEC CDV 60068-2-67 © IEC 2026
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 60068-2-67 has been prepared by IEC technical committee 104: Environmental conditions,
classification and methods of test. It is an International Standard.
This second edition cancels and replaces the first edition published in 1995 and Amendment
1:2019. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) revision of the requirements for the test chamber;
b) inclusion of the dew point temperatures;
c) change of the temperature and humidity tolerances to limits;
d) inclusion of a specified pre-conditioning procedure;
e) revision of the standardized requirements for the relevant specification;
f) inclusion of standardized requirements for the test report.
The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
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 www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all the parts of the IEC 60068 series, under the general title Environmental testing, 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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC CDV 60068-2-67 © IEC 2026
1 Scope
This part of IEC 60068 provides a standard test procedure for the purpose of evaluating, in an
accelerated manner, the resistance of small electrotechnical products, primarily non
hermetically sealed components, to the deteriorative effect of damp heat without condensation
on a specimen.
The test is not intended to evaluate external effects such as corrosion and deformation.
NOTE For further information on damp heat tests, see IEC 60068-3-4 [1].
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
IEC 60068-1, Environmental testing - Part 1: General and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60068-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
– IEC Electropedia: available at http://www.electropedia.org/
– ISO Online browsing platform: available at http://www.iso.org/obp
4 General test procedure
4.1 General
In this test the specimen is subjected to very high levels of unsaturated damp heat for a
relatively long period. If required by the relevant specification the specimen shall have a bias
voltage applied during testing. Guidance on the application of bias is given in Clause A.1.
The bias voltage (or bias voltage cycle) shall be applied to the specimen when the temperature
and the relative humidity have reached the stable state and continue until the specimen is under
recovery conditions.
In the case of plastic encapsulated components degradation results from absorption of water -
vapour by the plastic and penetration of moisture along terminals (see Annex B).
The temperature and relative humidity limits given in this document are intended to take into
account errors in the measurement, slow changes of temperature, and temperature variations
of the working space.
NOTE 1 For further information on the working space, see IEC 60068-3-6 [2] .
The temperature and relative humidity refer to the control sensor of the test chamber, if not
specified otherwise.
The limits stated in this document do not take measurements uncertainty into consideration.
IEC CDV 60068-2-67 © IEC 2026
NOTE 2 The limits are valid for an empty test space during stabilized temperature/humidity conditions of the test.
In some conditions, where the specimen has a negligible impact on the chamber control, the limits can still
...