ldeally, the PTC thermistors should operate at -25°C. There must be no temperature above 125°C for this thermistor to function. In this thermistor, there are 2 pins.
B59212R80B140 Features
Mount: Surface Mount 2 Pins Tolerance: 15%
B59212R80B140 Applications
There are a lot of TDK Corporation B59212R80B140 PTC Thermistors applications.