<P> An operating temperature is the temperature at which an electrical or mechanical device operates . The device will operate effectively within a specified temperature range which varies based on the device function and application context, and ranges from the minimum operating temperature to the maximum operating temperature (or peak operating temperature). Outside this range of safe operating temperatures the device may fail . Aerospace and military - grade devices generally operate over a broader temperature range than industrial devices; commercial - grade devices generally have the narrowest operating temperature range . </P> <P> It is one component of reliability engineering . </P> <P> Similarly, biological systems have a viable temperature range, which might be referred to as an "operating temperature". </P>

What is the maximum free air operating temperature