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74 I-CONNECT007 MAGAZINE I MARCH 2026 ARTICLE UL certification is one of an engineer's least favorite topics, yet it is critically impor- tant. The process is complicated but relatively straightforward for standard rigid PCBs, but as Jan Pedersen makes clear in NCAB Group's recent we- binar, "UL Approval for Flex and Flex-Rigid PCBs," it is a very different story. In this webinar," Pedersen, director of technology at NCAB Group, delivers a detailed, experience- driven explanation of why UL certification has become such a challenging aspect of flex-rigid design. He also explains why assumptions based on rigid boards often lead to costly surprises. For engineers designing flex or flex-rigid PCBs, or managing products that must carry UL approval, this webinar offers practical clarity in a space that is often opaque, misunderstood, and expensive to navigate. UL is frequently assumed to be a government body, but Pedersen corrected that misconception. UL is an independent product safety certification organization, not a U.S. government agency. That THE CHALLENGES OF UL Certification for Flex and Flex-Rigid PCBs BY M A RCY L A RO N T, I - C O N N ECT 0 07 WEBINAR REVIEW