KT117A Russia Transistors Silicon epitaxial planar Unijunction (UJT) with the N-type base. 
Unipolárny. 30V, 50mA, 300mW, 200kHz, h21e 0.5...0,7 
Case type: Metal TO-18 3pin 
E, B1, B2, 

Designed for use in low-power generators. 

...2T117A, BRY56, 2N1923, 2N2646,