Derating

In electrical and electronic equipment, when output current and other values are close to the upper or lower limits of the rated values, adverse operating conditions can negatively affect the equipment, leading to loss of accuracy or risk of failure. Therefore, when using equipment in harsh environments such as high temperatures or high altitudes, derating refers to using the equipment with a safety margin below the rated value range, such as reducing the usage range of output current, to ensure reliability and precision and to prevent failure. Derating may also be applied under normal conditions to enhance equipment reliability and avoid failures.