Thermostatic characteristics of PTC heater

The constant temperature characteristic of PTC heater depends on the special physical properties of the material, which makes the heater have the function of automatic regulation. Due to the PTC effect, the resistance value of the element is significantly reduced (or increased), then the heater will rapidly increase (or reduce) the heating power to make positive (or negative) thermal compensation for the system, so that the system will be close to the original working point (a) again to establish a balance and maintain constant temperature heating.