Hello! Siemens has been named in a lawsuit claiming that its AFCIs have excessive “nuisance tripping.” Siemens very strongly disputes these allegations. Siemens stands by its products, which work as intended and fully meet all applicable UL specifications (which include tripping standards). Notably, there is no claim whatsoever in the lawsuit that Siemens’ AFCIs fail to trip during arcing, or are otherwise dangerous or unsafe. We cannot comment further in light of pending litigation. Siemens offers easily-accessible technical support to electricians and customers with questions about its AFCI products, including tripping. We will continue to support purchasers, as always, in identifying and addressing the actual cause of any tripping issues. If support is needed, please call us! 1-800-333-7421