Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KTD863-O transistor can have a current gain of 60 to 120. The gain of the KTD863 will be in the range from 60 to 320, for the KTD863-GR it will be in the range from 160 to 320, for the KTD863-Y it will be in the range from 100 to 200.
SMD Version of KTD863-O transistor
The 2SC3444 (SOT-89), 2SC3444-C (SOT-89), BCP55 (SOT-223), BSR40 (SOT-89), FMMTA05 (SOT-23) and KST05 (SOT-23) is the SMD version of the KTD863-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
KTD863-O Transistor in TO-92 Package
The 2SD863-D is the TO-92 version of the KTD863-O.
Replacement and Equivalent for KTD863-O transistor