For MOSFETs, the maximum allowable current, voltage, power dissipation and other characteristics are specified as maximum ratings. Maximum ratings are the highest absolute values that must not be exceeded even instantaneously under any conditions. A device may not be able to recover from stress that exceeds a specified maximum rating. None of the absolute maximum ratings may be exceeded. Care should therefore be exercised regarding bounces in supply voltage, variations in the characteristics of electronic devices, possible exposure to stress higher than maximum ratings during circuit adjustment, changes in ambient temperature, fluctuations in the input signal, and other such factors. Please select the appropriate device according to the application.
Also, even within the absolute maximum ratings and the operating range, reliability will change significantly depending on the degree of derating. For information on derating, please refer to the following document.
Document title “Concepts of Derating”