Output derating

In electrical and electronic equipment, when the upper or lower limit of the rated operating temperature is exceeded, the output current (power) at the rated value often results in reduced reliability and is therefore limited to a lower value. Therefore, when using equipment near the upper or lower limit of the rated temperature, it is necessary to anticipate limitations on the output current (power) and operate at a value lower than the rating to ensure reliability and at the same time prevent equipment failure due to high (or low) temperatures.