The PTC (Positive Temperature Coefficient) heater is a unique heating device. It uses semiconductor ceramic materials with positive temperature coefficient characteristics as the core. After being powered on, it automatically controls the temperature by using the principle that the resistance changes with temperature. Structurally, it consists of a thermistor element, electrodes, insulating materials, and a housing. It features precise self - regulation, high safety, fast heating response, and long - term reliability, and is widely used in multiple industries such as household appliances, the automotive industry, industry, and medical and healthcare.