Typically, NTC thermistors are packaged in a Bulk package. In order to make things easier, it is included in the package Disc 7mm. A NTC thermistor must have a resistance tolerance of ±15% in order to operate. For reliable performance, NTC thermistors should be set to -20°C~160°C. In order for NTC thermistors to work properly, they must have their 2 pins connected.