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What is a thermistor ? NTC vs PTC thermistors ?

Maintenance Engineering Technical Issues Engineering Electrical génie électrique
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Question added by LABIB KOOLI , Director of the Sectoral Center for Training in Hotel Technologies at Southern Hammamet , Tunisian Vocational Training Agency (ATFP)
Date Posted: 2015/02/21
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Paul Bryson
by Paul Bryson , UPS Service Engineer , Emerson Network Power

A thermistor is a resistor where the resistance will change due to temperature ...NTC/PTC - is negative & positive temperature coefficient. NTC are usually used for temperature measurements where PTC can be used for circuit protection, as an increase in temperature results in a increase In resistance, thus can be used as a choke.

Deleted user
by Deleted user

Thanks for your kind invitation...

i am not a specialist

Alaa Alsouradi
by Alaa Alsouradi , Service Engineer , Rieckermann services Ltd

This is element that stretch or shrink depend of the temperature , if it is NTC :negative temperature coefficient : it is stretching as the temperature  is going down , and PTC : positive temperature coefficient :stretching as the temperature is going up , Thermistors used for protections purposes 

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