Electronics > Beginners
What is a SILISTOR ?
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MK14:
There seem to be datasheets online (not necessarily the device the OP found, but more modern ones).
So Silistor seems to be a brand name.
Which is a type of Varistor, if (Silistor) is a brand name, but PTC if (Silistor) is used as a generic name.

https://www.datasheetarchive.com/pdf/download.php?id=cb2132fb1bb8b58e2f644ad06486a8c6dc1e4e&type=O&term=silistor

There seem to be lots of datasheets, I only looked at one of them, linked to above.

https://www.datasheetarchive.com/silistor-datasheet.html

tl;dr
It seems to be a MOV/Varistor. Hence the 100V/20mA values on it.

drussell:
I agree that the Silistor is a brand/product name, in this case apparently made by Ishizuka Denshi.  Ok, that makes sense, but if it is a MOV type device, what is up with the 20 mA rating specification?

There are Japanese patents granted to Ishizuka Denshi for various things relating to temperature measurement like "method wherein an intermittent signal is applied to a temperature measuring part to operate a temperature detection element" and ones dealing with "thin film thermistor," "infrared detector," "infrared sensor," "production of temperature sensor," etc.

Perhaps a little more digging in to what this company traditionally focused on, what their product range included, etc. would yield some likely useful information.

Google Patents search for patents assigned to Ishizuka Denshi KK
T3sl4co1l:

--- Quote from: BravoV on October 30, 2018, 10:21:29 am ---Tim, any hint what or how to test ?

Most thermal sensor (non active component/semiconductor) devices have only 2 terminals right ?

--- End quote ---

Sure: just for basics, see if it has a meaningful resistance.  If not, then capacitance.  Test it under incrementally higher voltage/current, see if it's nonlinear.  If it's looking more like a MOV, try a higher voltage supply (200V+?) with a series resistor (100k?) and see if it has a reasonable varistor voltage.

I don't know what the 20mA means, but 100V is mains over in JP so it could be that it's rated by nominal AC RMS, like most (many?) MOVs are, and you should expect a Vz somewhat over 150V.

Tim
Gyro:
Looking at the tabs, there are a pair of same colour and gauge wires clamped to each tab. That would probably support the idea of some sort of 'across the line' type usage.
drussell:

--- Quote from: Gyro on October 30, 2018, 04:08:27 pm ---Looking at the tabs, there are a pair of same colour and gauge wires clamped to each tab. That would probably support the idea of some sort of 'across the line' type usage.
--- End quote ---

If it is an "across the line" device, what does the 20 mA specify?

I believe it is a non-linear resistance element of some kind, but I'm not so sure it is some kind of surge supressor or spike arrestor.
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