What is the operating temperature range of NTC thermistors in practical applications? In what range is it safe? Here, take Shiheng Electronics NTC thermistor as an example to analyze the operating temperature range of NTC thermistor.
In practical applications, try to make the power NTC thermistor work within the rated operating temperature range. If the upper and lower temperature limits are exceeded, it may cause the power NTC product to fail or be damaged.
•Be careful not to make it work in a humid environment, because an excessively humid environment will accelerate the aging of the power NTC thermistor.
•Since the power NTC thermistor is greatly affected by the ambient temperature, the maximum steady-state current at room temperature (0～25℃) is generally given in the product specification.
•Some power NTC thermistor products of foreign brands give the maximum steady-state current at 0~65℃, which will be more in line with the actual use of the product.
•The maximum current derating curve of power NTC thermistor is shown in the figure below. Under the highest or lowest operating temperature conditions, the rated current will be linearly derated to zero.
•The application conditions of power NTC thermistor products are not at room temperature (0～25℃), or due to the design or structure of the product itself, such as the power supply with some devices that generate more heat. When the ambient temperature is too high or too low, it must be derated according to the current reduction curve.