In the package of a Bulk, NTC thermistors are contained. It is included in the Radial package for your convenience. Temperatures below 200°C allow NTC thermistors to operate reliably. Optimal reliability requires a minimum temperature of -55°C for NTC thermistors. A total of 2 terminations are on these NTC thermistors. It is imperative to connect the 2 pins of the NTC thermistors in order to make it work.