POSISTOR® PRF18/21 Series, PTC Thermistors

Positive Temperature Coefficient (PTC) thermistors, also known as PTC temperature sensors, are specialized devices that demonstrate an increase in resistance as the temperature rises. These thermistors offer a relatively large and easily measurable output signal compared to other types of temperature sensors. However, it is important to note that their characteristics may be less stable and less suitable for precise temperature measurements. PTC thermistors are commonly utilized in applications where over-temperature detection is required. They are often designed with a distinctly nonlinear temperature-resistance relationship, which allows them to detect imprecise "high" temperature conditions effectively. While they may not provide accurate temperature measurements, they excel at identifying temperature thresholds above which protective measures or alarms need to be activated. Due to their unique properties, PTC thermistors find applications in various industries, including automotive, household appliances, and industrial equipment. Their ability to quickly respond to temperature changes and trigger appropriate actions makes them valuable for ensuring safety and preventing damage caused by excessive heat. In summary, PTC thermistors serve as reliable indicators of high-temperature conditions, making them suitable for over-temperature detection applications. While they may not offer precise temperature measurements, their distinct nonlinear temperature-resistance relationship allows for effective monitoring and protection against overheating.