PTC thermistors acc. to DIN 44081 (triple sensors acc. to DIN44082) are used to protect electrical machines against thermaloverload.Thermistors have an even steeper R/T characteristic asthat defined in the DIN standard. The temperature range is from 70°C to 160°C. PTC thermistor beads with different rated responsetemp eratures can be connected in series. This permits an optimal and economic thermal protection of machines and windings with different limit temperatures.
PTC Triple Thermistors (Standard Size)
PTC Identification and Part Numbers:
The color of the connection leads indenfies the rated response temperature. These are defined in DIN 44081/082.
Color of leads