Temperature Protection Devices
Product Lineup
PTC Limit Temperature Sensors (Protection Device)
Chip NTC Thermistors (Protection Device)
Product Spotlights
Tech Notes
Applications & Cases
PTC thermistors have the property that their resistance rises significantly when a certain temperature is exceeded. This property makes them suitable for use as temperature protection devices that detect defined high temperatures to protect circuits from overheating. TDK offers various types of PTC limit temperature sensors and motor protection sensors that incorporate PTC thermistors and serve as temperature protection devices. This article describes typical applications of such sensors.
NTC thermistors are heat-sensitive resistor elements of which resistance values rapidly decrease with rise of temperature. With this property, they are used as temperature protection devices for protecting circuits from overheating as well as temperature sensors.Other Contents
Related Information
TDK Product Features
Temperature protection devices are used to protect internal circuits or devices from overheating. The resistance of PTC thermistors rises rapidly when a certain temperature is exceeded, thus stopping the flow of current. This characteristic is self-regulating: Once the PTC cools down, it permits the current to flow again. TDK offers a wide range of PTC thermistors for protection against overload, current surges and excess temperatures. The portfolio also includes SMD NTC thermistors, which act as temperature sensors in monitoring systems. TDK has created the smallest NTC products in the industry by applying the same multilayer technology developed for multilayer ceramic chip capacitors (MLCCs).
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