Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KSD794-R transistor can have a current gain of 60 to 120. The gain of the KSD794 will be in the range from 60 to 320, for the KSD794-O it will be in the range from 100 to 200, for the KSD794-Y it will be in the range from 160 to 320.
Complementary PNP transistor
The complementary PNP transistor to the KSD794-R is the KSB744-R.
Replacement and Equivalent for KSD794-R transistor