台灣艾華

http://www.taiwanalpha.com/

艾華電子成立於民國59年, 是台灣第一家生產可變電阻的製造商, 經過三十多年不斷的研發創新, 目前已是全球前五大之可變電阻供應商, 並在二岸設有製造基地, 架構了全球運籌體系, 陸續在香港, 大陸成立子公司或辦事處, 提供客戶彈性及快速服務.

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Bel Power Solutions

http://belpowersolutions.com/

 As one of the world's largest providers of power conversion and power management solutions, Bel Power Solutions is one of only a few companies with the product breadth to support every step in the refinement of utility-grade AC into the various DC voltages required to power high-availability infrastructure systems at the site, system, and semiconductor levels.

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EATON

http://www.cooperindustries.com/content/public/en/bussmann.html