USB4™ Thunderbolt3™ Compatibility Compliance Test Specification

Version 1.1


This specification describes the tests needed to verify that a USB4 Product is Thunderbolt3 (TBT3) Compatible as defined in “USB4™ Thunderbolt3™ Compatibility Requirements Specification”. TBT3 Compatibility CTS is meant to ensure that USB4 products are interoperable with existing TBT3 products.


Tests and test setups related to Power Delivery, connection through LRD Cable and Prohibited Product IDs have been detailed in this specification.

Test Specification