What does “UL marking” mean?

FAQ about printed circuit boardsTERMINOLOGY

Security is key in the electronics industry. It is vital that users can rely on the finished product when considering factors such as fire and electrical safety, which means that both the PCB and the materials they contain must measure up to the highest standards. To ensure that the boards do conform, it has become common practice to UL certify the constituent materials or the PCB itself.

To start with, what is UL? The letters UL stand for Underwriters Laboratories.
Why is UL recognition important? UL is a major authority and enjoys a good reputation in the PCB industry. The company is irreplaceable for testing fire and electrical safety. Customers from around the world – including well-known Chinese companies – demand factories that can achieve UL recognition. Having UL recognition is therefore very important for PCB factories to produce secure boards and be able to access the international market.