Sanyou Corporation Limited engages in the research and development, manufacture, and sale of relays in China. It produces various types of relays, such as magnetic latching relays, general power relays, high voltage DC relays, and automotive relays that are used in home appliances, automotive industries, smart homes and grids, and energy solutions. The company also offers transformer industry solutions, which includes metering, digital display meter, one-close type, relay protection, motor protection, and residual current transformers. The company was founded in 2008 and is headquartered in Dongguan, China.