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TDK Product Features

Current protection devices are used to protect circuits from inrush currents and excess currents. TDK offers both NTC inrush current limiters as well as a wide range of PTC thermistors for protection against overload, current surges and excess temperatures. PTC thermistors utilize the fact that their resistance increases rapidly once a certain temperature is reached. This characteristic is used to detect abnormal temperatures or to control inrush currents. NTC thermistors, conversely, are characterized by a high resistance at low temperatures, which decreases with rising temperatures, which makes them suitable for controlling inrush currents immediately after power is activated.


Nov. 29, 2018
"Products Conforming to European Union RoHS Directive / Product Information Concerning Revised China RoHS" has been updated.
Sep. 10, 2018
NTC Inrush Current Limiters: "How to Use NTC Thermistors for Inrush Current Limiting" has been released.
Aug. 27, 2018
PTC Inrush Current Limiters, PTC Thermistors for Overcurrent Protection, PTC Thermistors for Telecom Applications: "How to use PTC thermistors as current protection" has been released.
Jul. 18, 2017
Current protection devices:Extended range of PTC inrush current limiters
Jul. 4, 2017
PTC Limit Temperature Sensors (Protection Device): A new release of the product portals.