PT. Bambang Djaja, better known as B&D Transformer, is the leading manufacturer of Power, Distribution and Instrument Transformers in Indonesia. Established in 1985 in Surabaya, Indonesia, the company has continued to excel and equip itself with the latest technology, machineries and highly-qualified professionals in order to serve the growing demands of transformer both in Indonesia and globally.

In year 2016, PT. Bambang Djaja has successfully become the first “purely own Indonesian” company to manufacture 150 kV Power Transformers. The company plans to continue growing further, and is now in full development for ratings up to 500 kV.