TE Connectivity announced Tuesday that it will buy Deutsch Group, a leading maker of heavy-duty electronic connectors, from German investment group Wendel for $2.06 billion.

Deutsch, a California company founded in 1938, makes electric and fiber-optic products that connect and protect the flow of power and data in what the TE Connectivity press release described as “harsh environments.” Since Wendel acquired the company in 2006, Deutsch’s sales have grown by more than 22 percent. The company, which employs 3,600 people, expects sales of approximately $670 million in 2011, according to a Wendel statement.