Typically, NTC thermistors are packaged in a Bulk package. Temperatures of 80°C provide reliable operation of NTC thermistors. It's best to operate NTC thermistors at -40°C for reliability. In order for NTC thermistors to work properly, they must have their 2 pins connected.
B57020M2502A1 Features
2 Pins Package/Case: Bulk 2% Tolerance
B57020M2502A1 Applications
There are a lot of EPCOS B57020M2502A1 NTC Thermistors applications.
Temperature detection of battery cells
Temperature compensation of display contrast
Temperature compensation of display backlighting (CCFL)