I'm working on finalizing my parts purchase list for the SSE board. Digging through some threads here it appears that an Amphenol CL-140: Digikey Part #KC014L-ND is the correct thermistor. Can someone confirm that please. Thanks.
Digikey - Thermistor
Digikey - Thermistor
Sorry for the newbie question, but what parameters do you take into account to choose the right thermistor, and where to install it?
Thanks!
Thanks!
There is a cold resistance and a hot resistance. In order to get to hot resistance the current must be high enough, so a ICL with too high a steady state current will still be somewhere on the curve of current vs resistance and have high resistance, which would normally be unpredictable and counterproductive.
Generally I have not found too much of a problem selecting the right one. Sometimes it is handy to buck a few volts, so a higher hot resistance is useful. Then it is just to match the expect current.
Generally I have not found too much of a problem selecting the right one. Sometimes it is handy to buck a few volts, so a higher hot resistance is useful. Then it is just to match the expect current.
Thanks @OldHector ,
what would be the pros and cons of the CL-140 vs CL-90?
https://www.amphenol-sensors.com/hu...-325D-Thermometrics-NTC-Inrush-031814-web.pdf
what would be the pros and cons of the CL-140 vs CL-90?
https://www.amphenol-sensors.com/hu...-325D-Thermometrics-NTC-Inrush-031814-web.pdf
I can only go by what I have gleaned from the Tubelab forum, but most of those thermistors have quite beefy current specifications. The CL-90 is just 2A and suits the primary side of the power traffo, and the CL-140 is rated 1.1A and fits well with the secondary side of the supply, after the rectifier. They both have curves that indicated the target resistance is close to being achieved over 50% loading, so they are not intrusive to the operation of the PSU after they have reached a steady temperature.