Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KSB744A-R transistor can have a current gain of 60 to 120. The gain of the KSB744A will be in the range from 60 to 320, for the KSB744A-O it will be in the range from 100 to 200, for the KSB744A-Y it will be in the range from 160 to 320.
Complementary NPN transistor
The complementary NPN transistor to the KSB744A-R is the KSD794A-R.
Replacement and Equivalent for KSB744A-R transistor