PTFT0805L4700JW

PTC Thermistors, also known as Positive Temperature Coefficient thermistors, are semi-conductor temperature sensors which are used in various applications for monitoring or controlling temperatures. PTC thermistors are resistors with positive temperature coefficients. This means as the temperature increases, its resistance to current increases linearly. The PTFT0805L4700JW is a specific thermistor that has a low resistance and is suited for applications in which a fast response of the thermistor is needed. Additionally, since this particular device has an operating temperature of up to +125 °C, it is ideal for use in high temperature applications.

This thermistor, and thermistors in general have an array of applications, with two of the most common being temperature sensing and temperature compensation. Temperature sensing applications include temperature sensors such as automotive fuel injection systems where the PTC thermistor can be used to monitor the temperature of the combustion chamber and ensure that fuel injectors are operating correctly and that the engine is not over-heating. Materials such as copper can also be monitored with a PTC thermistor, in order to ensure that they are kept below their melting points.

Temperature compensation is another common use-case for PTC thermistors. In some sensitive electronic instrumentation, a stable electrical performance is not achievable unless the device can be compensated with variations in temperature. This type of temperature compensation often requires the use of a secondary PTC thermistor to monitor the environment for both hot and cold conditions. Based on the thermistor measuring the temperature in relation to a predetermined temperature, the device can either adjust the main component accordingly, or shut down the system should the temperature exceed safe levels.

The PTFT0805L4700JW thermistor is one of the most popular PTCs thanks to its wide operating temperature range and low resistance. It uses two connected electrodes to measure temperature changes. When the temperature rises, the resistance of the thermistor will also increase linarily. It can be effectively used in a variety of temperature sensing applications, as well as temperature compensation solutions. It is also notable for its small size, making it an ideal choice for use in instruments and other small-scale projects.