Positive temperature coefficient thermistor, referred as PTC. Its resistance increases with the increasing temperature. PTC is incorporated in an appropriate amount of barium titanate (BaTiO 3) made of rare earth elements.Sourcing hard-to-find electronic components in the open market is a time-consuming work. WIN SOURCE ELECTRONICS specializes in offering obsolete & end-of-life Temperature Sensors - PTC Thermistors products, with in-stock inventory, datasheets and online purchasing. Find needed electronic parts, please review our online inventory below.