A thermistor is a special resistance whose resistance value changes with temperature. There are two main types of such resistors: positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC). The resistance value of PTC increases with the increase of temperature, while the resistance value of NTC decreases with the increase of temperature.
Thermistors have a wide range of applications, including but not limited to temperature measurement, control, and compensation. In practical applications, thermistors can be used to achieve overcurrent protection, motor self-starting, constant temperature heating and other functions. For example, PTC thermistors are often used for current limiting in circuit protection, and when too much current flows through, PTC resistors generate heat and increase, thus limiting current.
When selecting a thermistor, parameters such as its temperature range, accuracy, and desired response speed need to be considered. NTC thermistors are commonly used in applications that require a fast response, such as temperature detection and control systems, because of their resistance value decreasing with temperature.
Thermistor is an important electronic component, which can realize the precise control and monitoring of temperature change through the relationship between its resistance value and temperature. Different types and specifications of thermistors are suitable for different application scenarios, so the design and selection need to be carefully considered according to the specific needs.
