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UL Solutions in Taipei Approved for Thunderbolt™ 3 and Thunderbolt™ 4 Host and Device Product Certification Testing

This approval allows UL Solutions to help manufacturers adhere to relevant interoperability requirements and demonstrate their compliance in the marketplace.

Closeup of a Thunderbolt plug in a laptop

May 23, 2023

NORTHBROOK, ILLINOIS — May 23, 2023 — UL Solutions, a global leader in applied safety science, today announced that its laboratory in Taipei, Taiwan, is now approved by Intel Corporation to conduct Thunderbolt™ 3 and Thunderbolt™ 4 host and device product certification testing.

The UL Solutions Taipei laboratory conducts electrical and functional testing on Thunderbolt 3 and Thunderbolt 4 host products, such as laptop and desktop computers and monitor and docking station devices.

Thunderbolt 4 is the next-generation connectivity solution capable of transferring data, outputting a display and providing power. Thunderbolt 4 builds on the innovation of Thunderbolt 3 connectivity, providing a 40 Gigabits per second (Gbps) connection for data and video, and up to 100 watts of power over a single connection. Thunderbolt 4 is the most comprehensive Thunderbolt specification to date. It complies with the broadest set of industry-standard specifications, including USB4®, DisplayPort™ and PCI Express (PCIe®), and is fully compatible with prior generations of Thunderbolt and USB products.

“Thunderbolt 3 and Thunderbolt 4 are powerful connectivity technologies for transmission of both power and high-throughput digital content. UL Solutions is proud to help our customers advance the performance of products using Thunderbolt by evaluating compliance against specifications and applicable standards,” said Eric Bulington, product management director in the Engineered Materials group at UL Solutions. “As a global leader in applied safety science, UL Solutions helps empower Thunderbolt host and device manufacturers through rigorous performance and safety compliance evaluation.”

“UL Solutions’ certification program is important to the continued success of Thunderbolt and demonstrates to customers that products meet the compliance and interoperability requirements expected of the Thunderbolt standard,” said Jason Ziller, general manager, Client Connectivity Division at Intel. “We are pleased to have them as an authorized test center for hosts and devices.”

UL Solutions evaluates Thunderbolt 3 and Thunderbolt 4 host and device products based on Thunderbolt specifications and UL/IEC 62368-1, Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements.

Please contact UL Solutions at for additional information about the UL Solutions service offering under the Thunderbolt Certification Program.

  • Thunderbolt and the Thunderbolt logo are trademarks of Intel Corporation in the U.S. and/or other countries.
  • USB4® is a trademark of USB Implementers Forum.
  • DisplayPort™ is a trademark of the Video Electronics Standards Association (VESA®).
  • PCIe® is a trademark of PCI-SIG.

About UL Solutions
A global leader in applied safety science, UL Solutions transforms safety, security and sustainability challenges into opportunities for customers in more than 100 countries. UL Solutions delivers testing, inspection and certification services, together with software products and advisory offerings, that support our customers’ product innovation and business growth. The UL Certification Marks serve as a recognized symbol of trust in our customers’ products and reflect an unwavering commitment to advancing our safety mission. We help our customers innovate, launch new products and services, navigate global markets and complex supply chains, and grow sustainably and responsibly into the future. Our science is your advantage.




Steven Brewster

UL Solutions

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