PurposeThe purpose of this paper is to discuss the temperature failure effect on electronic components and their electrical parameters variation.Design/methodology/approachThe MOSFET device parameters analysis was done by numerical analysis based on a double exponential model using the integrated pn junction.FindingsThe temperature dependence of these parameters is investigated; their evolution allows the evaluation of device's operation reliability in high‐temperature environments.Originality/valueThe paper demonstrates how the temperature affect the normal operation of the electronic device and the model accuracy is investigated at high temperature.