Output Derating

In electrical and electronic devices, when the temperature exceeds the upper or lower limits of the rated operating temperature, the output current (power) often becomes less reliable at the rated value and must be limited to a smaller value. Therefore, when using a device near the upper or lower limits of the rated temperature, it is common to use it at a value smaller than the rated output current (power) to ensure reliability and to prevent malfunctions caused by high (or low) temperatures.