Phil Allison wrote:

Jon Elson wrote:


The PTC thermistors are from Keystone Carbon Corp., I used these some
years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-C...Company/KC010L


** That pic looks exactly like a regular NTC thermistor.
OOPs, that is indeed what I was thinking of, was NTC, not PTC, for inrush
surge limiting.

Jon