The KTA200 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads. Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KTA200 transistor can have a current gain of 70 to 240. The gain of the KTA200-O will be in the range from 70 to 140, for the KTA200-Y it will be in the range from 120 to 240.
Complementary NPN transistor
The complementary NPN transistor to the KTA200 is the KTC200.
SMD Version of KTA200 transistor
The FMMTA55 (SOT-23) and KST55 (SOT-23) is the SMD version of the KTA200 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.