WHMA Wired-In May/June 2020

Wired In

Just Released – IPC/WHMA-A-620 Revision D

Important criteria updates, reducing unnecessary rework for products, greater ease-of-use and enhancing the acceptability with other key standards are among the changes users will find in the newly released D revision of IPC/WHMA-A-620, Requirements and Acceptance for Cable and Wire Harness Assemblies. This important industry standard is a joint effort of IPC and the Wire Harness Manufacturer’s Association (WHMA).

This revision addresses more than 375 documented comments and recommendations from users throughout the industry and features a number of new or revised graphics. This is a heavily involved process managed by committee members from 15 different countries. The process for revising this standard begins with items/comments sent to the committee for discussion. The committee then reviews and perhaps modifies the comments and eventually votes on for inclusion into the standard. The line items spanned 176, 11×17 pages.  All of this was accomplished, and the standard was ready to be published 11 days ahead of the three-year goal for publishing.  Congratulations to all involved in this intense, significant and time-consuming process.

The major change in this revision was to remove the “target condition” from the entire standard. The committee addressed the challenges that some organizations had with defining “close to perfect” criteria. This can often cause unnecessary rework to products. This change moved much of the target criteria to acceptable criteria. Many of the pictures associated with target criteria were retained since they would apply to acceptable criteria. Any pictures or criteria that were removed will be sent over to the next revision of the handbook, IPC-HDBK-620.

Some other major changes that were made was the revision of Section 18 solderless wrap criteria and a new section for over-molding of flexible flat ribbon. A redline document outlining all the changes will be available in the next few weeks.

IPC/WHMA-A-620D is 420 pages long. IPC/WHMA-A-620D, Requirements and Acceptance for Cable and Wire Harness Assemblies is available now at IPC/WHMA members can purchase the hardcopy for $145 or the single-user download for $130. The industry price for the hardcopy is $290 or the single-user download for $260. For more information or to purchase a copy of IPC/WHMA-A-620D, visit

If you have any questions or comments, please email us at [email protected].