PTC, or Positive Temperature Coefficient, refers to a type of material that increases its electrical resistance as the temperature rises. This property makes PTC materials useful in various applications, such as temperature sensors and circuit protection devices. When the temperature exceeds a certain threshold, the resistance increases significantly, limiting the current flow and preventing overheating. PTC thermistors are a common example of PTC devices. They are often used in electronic circuits to protect against overcurrent conditions. By incorporating PTC thermistors, manufacturers can enhance the safety and reliability of their products, ensuring they operate within safe temperature ranges.