Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
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You are correct. I was thinking of a PTC thermistor. The thermistors in parallel will not share.
Still, placing 2 in parallel provides redundancy. I see no negative effects of having 2 in parallel.
Thanks for the correction.
Sal
Still, placing 2 in parallel provides redundancy. I see no negative effects of having 2 in parallel.
Thanks for the correction.
Sal
DryCamper11 wrote:Let's say all the current goes through the thermistor with the lower resistance. This part will heat up and as a result, its resistance increases to that of the other part. Now the parts have equal resistance and they will share. One of the parts will just have a little higher temperature.
These thermistors (designed for inrush current limiting) are NTC components. NTC is negative thermal coefficient, which means that as the temperature goes up, the resistance goes the other way - down. For most materials, electrical resistivity will increase with increasing temperature, they have a PTC.
