PRF18BF471RS5RB

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Temperature Sensors - PTC Thermistors

A PTC thermistor is a thermally-sensitive resistor, also known as a Positive Temperature Coefficient (PTC) device. It uses a semiconductor material that has a positive temperature coefficient of resistance. This means that as the temperature increases, its electrical resistance also increases. These characteristics make them ideal for a range of applications, such as over-current and over-temperature protection, temperature sensing, motor protection, and controlling relay contacts.

PRF18BF471RS5RB

The PRF18BF471RS5RB is a PTC thermistor developed by Panasonic. It is a single-in-line package, which makes it simple to install and connect to a circuit. The thermistor is specifically designed as a temperature sensor for surface mount designs. The PTC is available in sizes of 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, and 0.8 mm. It has a thermal response time of 4 ms and a thermal resistance range of -40°C to +125°C. Additionally, the PRF18BF471RS5RB is highly reliable, due to its ability to withstand a voltage surge up to 400 V.

Application field and working principle

Due to its small size and highly reliable characteristics, the PRF18BF471RS5RB is suitable for a range of surface mount temperature sensing applications. One such example is the temperature detection of monitor and laptop hardware components. The thermistor can detect slight temperature changes in the electronic components, and send the information back to the host system. This can help to monitor the status and performance of the electronic components, and alert the user in the event of an over-temperature or other issue.

The working principle of the thermistor is relatively simple. When the temperature increases, electrons flow from the semiconductor PTC material to the n-type material, reducing the resistance of the PTC. As the temperature falls, the electrons move away from the n-type material, and the resistance of the thermistor increases. This change in resistance is detected by the monitoring system, and is used to calculate the current temperature.

Conclusion

The PRF18BF471RS5RB is an ideal solution for temperature sensing applications for surface mount designs. Its small size and reliable characteristics make it suitable for a range of applications, including temperature detection in monitor and laptop hardware. The PTC thermistor is reliable and cost-effective, and is an excellent choice for temperature sensing applications.

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