USITC Institutes Section 337 Investigation of Power Converters

ITC News Releases

Filed February 11th, 2026

Detected February 12th, 2026

Summary

The U.S. International Trade Commission (USITC) has instituted an investigation (337-TA-1484) into certain power converters, circuit board assemblies, and computing systems. The investigation is based on a complaint alleging infringement of patent claims related to imported products.

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What changed

The U.S. International Trade Commission (USITC) has instituted an investigation, docketed as 337-TA-1484, concerning alleged violations of section 337 of the Tariff Act of 1930. The investigation stems from a complaint filed by Vicor Corporation, alleging that the importation and sale of certain power converters, circuit board assemblies, and computing systems infringe its patent claims. The USITC has identified multiple respondents, including Delta Electronics, Luxshare Precision Industry, Monolithic Power Systems, and Wistron Corporation, among others.

This action initiates a formal investigation where a USITC Administrative Law Judge will preside over evidentiary hearings and make an initial determination on the merits. If a violation is found, the USITC may issue a limited exclusion order and cease and desist orders. Companies involved in the importation, sale, or manufacturing of the specified power converters and related systems should monitor the proceedings closely, as potential remedial orders could impact their ability to import and sell these products in the United States. The USITC aims to complete the investigation within a set target date, and any remedial orders issued are subject to review by the U.S. Trade Representative.

What to do next

Monitor the progress of investigation 337-TA-1484.
Review the complaint and notice of investigation for potential impact on imported products.
Consult legal counsel regarding potential infringement and remedial orders.

Penalties

Potential for limited exclusion orders and cease and desist orders if a violation of section 337 is found.

Source document (simplified)

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USITC Institutes Section 337 Investigation of Certain Power Converters, Circuit Board Assemblies, and Computing Systems Containing the Same

February 11, 2026
News Release 26-023
Inv. No(s).

  337-TA-1484

Contact: Claire Huber, 202-205-1819 USITC Institutes Section 337 Investigation of Certain Power Converters, Circuit Board Assemblies, and Computing Systems Containing the Same

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.