Power Adapter Regulations – Comparing DoE Level VI and CoC Tier 2 (Infographic)

January 2, 2018 by CUI Inc

Note: This post was originally published March 7, 2017 and updated on January 2, 2018 to reflect the latest timeline for the EU's voluntary CoC Tier 2 standard becoming law.

The successive laws mandating higher average efficiencies in external power supplies have undoubtedly had a significant impact on global power consumption over the past decade. However, ensuring that your external power supply is up-to-date with the dynamic regulatory environment has become a complex task.

When the United States Department of Energy (DoE) implemented its Level VI standard in February 2016, most OEMs were forced to update their designs to meet these requirements. Now with even stricter regulations proposed to become law in the European Union (EU) in the near future, companies that ship an external power adapter with their end product must yet again closely monitor the regulatory environment to ensure that they are in compliance.

To keep your design ahead of these rapidly changing regulations, we have developed this infographic with the goal of simplifying for you the where, when, and what of the current US DoE Level VI standard and the upcoming EU CoC Tier 2 regulations.

Power Adapter Regulations – Comparing DoE Level VI and CoC Tier 2

Additional Resources

Have comments regarding this post or topics that you would like to see us cover in the future?
Send us an email at cuiinsights@cui.com

TODO: tags & categories


As a leader in power electronics and electromechanical components, we strive to provide engineers with reliable and proven solutions across a range of market segments as technology allows the world to connect in new ways. Most importantly, we have an unwavering commitment to create collaborative partnerships with customers and to equip them with the tools and resources they need to succeed.