PTC thermistors are packaged as Radial units to prevent damage. It is recommended to set the minimum operating temperature of the PTC thermistors at -40°C. Ensure this thermistor is working at 125°C by keeping its operating temperature below that. PTC thermistors are terminated at 2. As you can see, this thermistor has 2 pins. As a result, PTC thermistors may supply 160V voltage at all times. PTC thermistors have been designed for a current of 7A. As for the DC circuit, these thermistors are rated for 160V. If the thermistor is to provide reliable performance, the voltage should be 160V.