NTC thermistors are widely used in temperature measurement, temperature control, and temperature compensation. For example, in battery applications, NTC thermistors can be used to monitor the charging and discharging temperatures of batteries in real time.
The B-value is an important parameter of negative temperature coefficient (NTC) thermistors, used to describe the resistance change of the thermistor at different temperatures. Specifically, the B-value reflects the resistance change between two temperature points. The larger the B-value, the more sensitive the thermistor is to temperature changes, the steeper the temperature curve, and the more sensitive the thermistor.
The formula for calculating the B-value is…
Where (R1) and (R2) are the zero-power resistance values at temperatures (T1) and (T2), respectively. (T1) and (T2) are two specified temperatures (in Kelvin). Common temperature combinations include 25/50℃, 25/85℃, and 0/100℃.
For commonly used NTC thermistors, the B value typically ranges from 2000K to 6000K. A higher B value indicates a greater change in resistance with temperature variations, resulting in greater sensitivity and a faster response time.
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