Tirathai Public Company Limited, together with its subsidiaries, manufactures, repairs, sells, and maintains transformer equipment in Thailand and internationally. It provides power transformers for manufacturers and suppliers of electrical energy. The company also offers various distribution transformers along the distribution system lines and special transformers. In addition, it distributes, installs, and maintains electrical power equipment. Further, the company offers transformer erection and installation, oil filling, maintenance, modification and repair, and testing, as well as transformer rental services; and custom metal work services. The company was incorporated in 1987 and is based in Samut Prakan, Thailand.