Tesar Polska, based in Niepołomice, Poland, has been designing and manufacturing die-cast and instrument transformers since 2013.Tesar Polska, based in Niepołomice, Poland, has been designing and manufacturing die-cast and instrument transformers since 2013.

Tesar Polska is part of the well-known transformer manufacturer Tesar, the first Italian company to apply the resin casting technique to transformers.

After many years of operation with a sales office in Poland, Tesar decided to build a new production facility on a green field in Kraków's industrial area, which has been operating under its name Tesar Polska since 2013.

In 2016, Tesar and Tesar Polska became part of R&S, a leading provider of electrical infrastructure products in key markets worldwide.