I am trying to find out specifications of a thermister on which "10P" is printed. Its resistance at room temp. is 18 Ohms when the circuit is power off. How can I find out its specifications?PTC Thermister 10P

This is the approx. circuit where this PTC thermister is used. What is the purpose of using a thermister in this circuit?

PTC Thermister circuit


The company who makes these is called ampron, its a Chinese company which means that documentation is hard to find, and they might have to be contacted directly.

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As far as the use of the PTC it is most likely used as a current limiter for C20. As the current through C20 increases the PTC heats up and increases it's resistance. This would also change the filter pole of L1/C20 as temperature increases. Why it's there exactly, I don't know.


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