Keystone CL-60...How Hot Should It Get?

[RoboMan]

No, you should use 2 CL-60 if your maximum current is near 10 A. If you have a 6 A current, they will each be at only about half of their minimum resistance during operation. You should be using CL-40 instead. For optimum performance, always use a thermistor with maximum current rating just above your actual. A wide range is generally stocked by places like Digikey, so availability of an appropriate part is rarely an issue.

Operating current near the max will cause the least voltage drop across the thermistor. However 1 or 2 volts drop wouldn't affect too much, especially in the case of Class A where current is pretty steady. Sometimes not all models are available locally.

Be sure to very closley match any thermisistors that operate in parallel so they each share the same amount of current!!!!
Mark

I made the mistake, as the thermistor is a NTC device, parallel configuration is not recommended.