Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KSC3502-C transistor can have a current gain of 40 to 80. The gain of the KSC3502 will be in the range from 40 to 320, for the KSC3502-D it will be in the range from 60 to 120, for the KSC3502-E it will be in the range from 100 to 200, for the KSC3502-F it will be in the range from 160 to 320.
Replacement and Equivalent for KSC3502-C transistor