Typically, NTC thermistors are packaged in a Bulk package. In order to make things easier, it is included in the package Epoxy. Temperatures of 70°C provide reliable operation of NTC thermistors. It's best to operate NTC thermistors at 0°C for reliability. Each of these NTC thermistors has a total of 2 terminations. In order for NTC thermistors to work properly, they must have their 2 pins connected.