Need help with TESLA part identification.

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Hello, I did try to search the web with no avail. I was given a box with semiconductors and I found among them few parts made by TESLA. Markings say: "TESLA" and underneath code: KT2061400 and KT2061200.
They have three outputs and can be mounted on the heatsink. Does anyone know what are they?
Thanks
 
Hello DoomPixie,
Thanks for the response. I have no digital camera available. I will try to borrow it. The package looks like TO220. Markings are printed with silver ink. Since parts look old markings are hard to read. On some I can see letters UN above TESLA name. One part has letters UW underneath the code. Output pins are not flat but round.
 
Hi,
these devices are probably silicon controlled rectifiers.
KT206 / 200 with 200 Volts
KT206 / 400 with 400 Volts.
The letter code is a date code of 1980- 89, i guess.
Further search in eastern europe forums may be helpful.
http://www.google.com/search?q=KT206+datasheet&hl=de&lr=&start=0&sa=N
First hit of German google is a polish forum and they don´t even know, wether it´s a Triac or a thyristor.
Onra
 
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