Tirathai Public Company Limited, together with its subsidiaries, manufactures, repairs, sells, and maintains transformer equipment in Thailand and internationally. The company offers power transformers for manufacturers and suppliers of electrical energy. It also provides various distribution transformers along the distribution system lines, and special transformers. In addition, the company distributes, installs, and maintains electrical power equipment. Further, it 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 headquartered in Samut Prakan, Thailand.