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Correlating NTC-Reading and Chip-Temperature in Power Electronic Modules In power electronic designs, the instantaneous chip temperature is of major importance to the user. In case the chip can’t be accessed, additional sensors like NTCs can be used to measure a temperature that depends on the chip temperature. From this value, a chip temperature can be estimated. Determining the thermal correlation between chip temperature and sensor reading is not a trivial task. The present paper gives an insight into a basic but reliable procedure to extract the necessary information using an experimental setup.