JSTI TRANSFORMERS PVT LTD is an Indian manufacturing company established on February 4, 2009, and is based in Baddi, Himachal Pradesh. As a 100% subsidiary of JST Transformateurs SAS from France, JSTI specializes in the production of traction transformers for the railway and electric locomotive industries. The company is recognized for its reliability and has been operational for over 16 years.

JSTI manufactures traction transformers with capacities up to 10 MVA, designed for semi-high-speed trains, high-speed trains, metro systems, and electric locomotives. Their facility can produce over 200 transformers annually and includes advanced testing capabilities to ensure compliance with international standards. In addition to manufacturing, JSTI offers design and technical support, prototype development, and rigorous quality management, holding several international certifications. The company serves a global market, supplying major railway operators and locomotive manufacturers worldwide.