When it comes to substances in which resistance decreases as temperature increases, the name given to this phenomenon is negative temperature coefficient (NTC) thermistors. NTC thermistors are a type of resistor whose resistance decreases as the temperature rises. This unique characteristic makes them incredibly useful in a variety of applications, such as temperature sensors, inrush current limiters, and temperature compensation circuits.

NTC thermistors are made from a semiconducting material, typically metal oxides such as manganese, nickel, or cobalt. These materials exhibit a negative temperature coefficient of resistance, meaning that as the temperature increases, the number of charge carriers also increases, leading to a decrease in resistance. This makes NTC thermistors ideal for applications where precise temperature measurement is required.

One common use of NTC thermistors is in temperature sensors for electronic devices. By incorporating an NTC thermistor into a circuit, the resistance can be measured to determine the temperature of the device. This is particularly useful in applications where precise temperature control is necessary, such as in HVAC systems, automotive engines, and medical devices.

Another important application of NTC thermistors is inrush current limiters. When power is first applied to a circuit, a surge of current can flow through the system, potentially damaging components. By using an NTC thermistor as an inrush current limiter, the resistance will initially be high, limiting the current flow. As the temperature increases, the resistance decreases, allowing the circuit to operate normally.

Overall, NTC thermistors are an essential component in many electronic devices and systems, providing precise temperature measurement and control, as well as protection against inrush currents. Their unique characteristics make them a valuable tool for engineers and designers looking to optimize the performance of their products.

If you would like to learn more about NTC thermistors and their applications, you can visit TDK Electronics for more information.

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