MF11 474 Temperature Compensated NTC Thermistor 470K Ohm 5MM For Electronic Equipment Detection

MF11 474 Temperature Compensated NTC Thermistor 470K Ohm 5MM For Electronic Equipment Detection

Main featuresMF11 Temperature Compensated NTC Thermistor.pdf

1. Temperature characteristics
The figure below shows the circuit symbol of the thermistor and the resistance-temperature characteristic curves of several thermistors. Among them, curve ① and curve ② are the characteristic curves of the negative temperature coefficient thermistor, and its resistance value decreases with the increase of temperature. The relationship between resistance value and temperature of curve ① is approximately exponential. The characteristic of curve ② is that there is a critical temperature. After exceeding the critical temperature, the resistance value drops sharply. Curves ③ and ④ are the characteristic curves of the positive temperature coefficient thermistor, and its resistance value rises with the increase of temperature within a certain temperature range. For comparison, the resistance-temperature characteristic curve of platinum wire is also drawn in the figure.
2. Volt-ampere retention
That is, in the steady state, the relationship between the current I passing through the thermistor and the voltage U across it. The figure below shows the shape of the volt-ampere characteristic curve of a thermistor. Among them, Figure a is the volt-ampere characteristic of the negative temperature coefficient thermistor. It can be seen that when the current is small, the thermistor follows Ohm's law. When the current increases to a certain value, the voltage reaches the maximum value Um. If the current continues to increase, due to the temperature rise of the thermistor itself, negative resistance characteristics begin to appear. Although the current increases, the resistance value decreases and the terminal voltage decreases.

Specification

Negative temperature coefficient thermistor, also known as NTC thermistor, is a kind of sensor resistance whose resistance value decreases with the increase of temperature. Widely used in various electronic components, such as temperature sensors, resettable fuses and self-adjusting heaters, etc.

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