IEC-60721-3-9 Classification of environmental conditions - Part 3-9: Classification of groups of environmental parameters and their severities - Microclimates inside products

IEC-60721-3-9 - EDITION 2.0 - CURRENT

Document Center Inc. is an authorized dealer of IEC standards.
The following bibliographic material is provided to assist you with your purchasing decision:

IEC 60721-3-9:2024 classifies groups of microclimatic conditions, to which components (basic parts, assemblies, built-in units) can be subjected inside products, which are used under the climatic conditions as classified in IEC 60721-3-3 and IEC 60721-3-4.
This second edition cancels and replaces the first edition published in 1993, Amendment 1:1994 and Corrigendum 1:1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 2 has been updated;
b) Clause 4 has been re-edited and simplified;
c) Annex A has been revised and updated;
d) a new Annex B has been added and gives the origin of the constitutional diagram for humid air, which is the basis of drawing the climatogram for a microclimate.



Want this as a site license?

To find similar documents by classification:

19.040 (Environmental testing Including testing equipment)

This document comes with our free Notification Service, good for the life of the document.

This document is available in either Paper or PDF format.

Document Number

IEC 60721-3-9 Ed. 2.0 b:2024

Revision Level




Publication Date

April 1, 2024

Committee Number