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) ...
Forum Discussion
BFL13 wrote:Yes, a higher dissipation factor is better but, as was mentioned, you want sufficient resistance and amperage rating to handle the amount of inrush current to protect downstream devices, principally, the transformer. You also want the steady state rating to be able to handle the circuit current.
Thanks. the data sheet for the type I am going to use (try out!) says dissipation factor 45.4 if that is good or bad.
http://www.ametherm.com/datasheetspdf/SL325R020.pdf
The smaller thermistor (202) they first used data sheet has it at 28 and the 302 one I was thinking of getting is 40, so 45 is better?
http://www.legacydistribution.co.uk/downloads/NTC-thermistors/SCK.pdf
The original thermistor may not have been able to do it's job. Or something else may be amiss that is drawing a lot of current. I really don't think it is anything user related. These devices react super-fast and I've tortured a few to well beyond their rating.
Do you have a picture of the whole board (the guts)? I'm more curious than can be helpful but a look at the quality of the discrete components would be interesting.
