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