NTC thermistor is an acronym for Negative Temperature Coefficient thermistor. It was discovered in 1833 by Michael Faraday, who was researching silver sulfide semiconductors, and commercialized by Samuel Reuben in the 1930s. Oxide semiconductor ceramics containing manganese (Mn), nickel (Ni), cobalt (Co), etc.

NTC thermistors are used everywhere in our lives, and because of their resistance characteristics that the resistance value decreases as the temperature rises, they are used in temperature sensors such as thermometers and air conditioners, and in temperature control devices such as smartphones, kettles, and irons. It is also used as a current control for power supply equipment. In recent years, with the electrification of automobiles, there has been a diversification of products for automotive use.