The KSC1815L 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 KSC1815L transistor can have a current gain of 350 to 700. The gain of the KSC1815 will be in the range from 70 to 700, for the KSC1815GR it will be in the range from 200 to 400, for the KSC1815O it will be in the range from 70 to 140, for the KSC1815Y it will be in the range from 120 to 240.