KOA (Japaneseコーア 株式会社, koa kabushiki kaisha ) is a 1940 in Tokyo was established, Japanese manufacturer of passive electronic components headquartered in Ina in Nagano Prefecture.
KOA is one of the three largest manufacturers of SMD resistors world, but also offers wired components. The KOA range includes LTCC, resistors, temperature sensors, coils, and electrical fuses.
In addition to the parts of companies in Japan with approximately 1,100 employees in Europe there (about 80 employees), the USA and Singapore wholly owned sales subsidiaries and factories in China, Taiwan and Malaysia. A total of approximately 3,500 employees work at KOA.