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May i know the temperature coefficient of this part : B57861S103F40
**broken link removed**
Based on the spec, the datasheet does not give the coefficient but the beta value B(25/100) = 3988.
How to obtain "temperature coefficient" ?"How do I determine the temperature with the measured resistance?

Read all about it here:

http://www.epcos.com/inf/50/db/ntc_02/00170027.pdf#search='b%20value%20thermistor'