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I am cleaning out some of my misalliances electronic bins and I have a handful of these components. Not sure what to call them or what the "metal/ceramic" disk is made of. Disk and contacts are non-magnetic.
Guessing its a kind of signal delay or resistor. Anyone know?
PS. Happy Fathers day to all the dads.
http://i.imgur.com/2XLuU8r.jpg?1
Any markings?
That's a PTC (Positive temperature coefficient) resistor.
I have seen them in CRT TVs as part of the Degaussing cable setup, and fridge compressors as part of the 'startup coil' used when the compressor as starting.
https://en.m.wikipedia.org/wiki/Thermistor
Quote. {PTC (Positive temperature coefficient)
Most PTC thermistors are made from doped polycrystalline ceramic (containing barium titanate (BaTiO3) and other compounds) which have the property that their resistance rises suddenly at a certain critical temperature. Barium titanate is ferroelectric and its dielectric constant varies with temperature.}
There's Silver on their contact faces, but a tiny amount of it. I don't bother saving them up anymore as I don't think there's anywhere they could be sold.
Thank you eesakiwi, that's exactly what I was looking for.