The U.S. International Trade Commission (Commission or USITC) voted to institute an investigation of certain power converters, circuit board assemblies, and computing systems containing the same. The products at issue in the investigation are described in the Commission’s notice of investigation.

The investigation is based on a complaint filed on behalf of Vicor Corporation of Andover, Massachusetts, on January 12, 2026. Supplements to the Complaint were filed on January 21, 23, and 26, 2026. The complaint, as supplemented, alleges violations of section 337 of the Tariff Act of 1930 in the importation into the United States and sale of power converters, circuit board assemblies, and computing systems containing the same that infringe certain claims of the patent asserted by the complainant. The complainant requests that the USITC issue a limited exclusion order and cease and desist orders. 

The USITC has identified the following respondents in this investigation:

• Delta Electronics, Inc., Taipei, Taiwan
• Delta Electronics (Americas) Ltd, Fremont, California
• DET Logistics (USA) Corporation, Fremont, California
• Luxshare Precision Industry Co., Ltd., Dongguan City, Guangdong, China
• Dongguan Luxshare Technology Co., Ltd. a/k/a Luxshare-Tech, Dongguan City, Guangdong, China
• Shanghai Peiyuan Electronics Co., Ltd. d/b/a MetaPWR Electronics Co., Ltd. and Shanghai MetaPWR Electronics Co., Ltd., Lingang New Area, China
• Monolithic Power Systems, Inc, Kirkland, Washington
• Chengdu Monolithic Power Systems Co., Ltd., Sichuan, China
• MPS International (Shanghai) Ltd., Shanghai, China
• Wistron Corporation, Taipei City, Taiwan,
• Wiwynn Corporation, New Taipei City, Taiwan
• Quanta Computer Inc., Taoyuan City, Taiwan
• Quanta Cloud Technology Inc., Taoyuan City, Taiwan
• Quanta Cloud Technology USA LLC, San Jose, California
• Quanta Computer USA Inc., Fremont, California 

By instituting this investigation (337-TA-1484), the USITC has not yet made any decision on the merits of the case. The USITC’s Chief Administrative Law Judge will assign the case to one of the USITC’s administrative law judges (ALJ), who will schedule and hold an evidentiary hearing. The ALJ will make an initial determination as to whether there is a violation of section 337; that initial determination is subject to review by the Commission. 

The USITC will make a final determination in the investigation at the earliest practicable time. Within 45 days after institution of the investigation, the USITC will set a target date for completing the investigation. USITC remedial orders in section 337 cases are effective when issued and become final 60 days after issuance unless disapproved for policy reasons by the U.S. Trade Representative within that 60-day period.