UL Certification

What is the Underwriters Laboratory (UL)?

UL is the certifying agency for product safety in the United States of America. The Underwriters Laboratories (UL) test products worldwide according to corresponding U.S. product safety requirements, so that these products may be marketed and sold in every part of the United States of America.

How to add UL marking on the PCB?

We have 2 active board classes, each with its own UL marking:

If you want your board marked with the Underwriters Laboratory logo, please refer to the below format and do not modify the format randomly.  Please note the UL logo should be added to the silkscreen layer of the original Gerber file.