For protection, PTC thermistors are packaged in Radial packages. Using PTC thermistors at -40°C temperature should be their minimum operating temperature. There must not be an increase in temperature above 85°C for this thermistor to work. A PTC thermistor could supply 30V voltage when it is in operation. These thermistors are rated for DC circuit voltage of 30V. The PTC thermistors should emit 3W heat.
MC33165 Features
Package / Case: Radial Mount: Through Hole
MC33165 Applications
There are a lot of Multicomp MC33165 PTC Thermistors applications.