Semiconductor heating elements generate the temperature through PTC (Positive Temperature Coefficient) semiconductor elements. In the event of a temperature change, the PTC element changes its electrical resistance. One advantage of the PTC heating element is that they do not require a thermostat or a thermal fuse. With a correctly sized output, an even temperature is smoothly achieved on the surface of the radiator. As the output of the semiconductor decreases when the temperature rises, a self – regulating effect avoids overheating, and ensures optimum use of power.