Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KTD863-Y transistor can have a current gain of 100 to 200. 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-O it will be in the range from 60 to 120.
SMD Version of KTD863-Y transistor
The 2SC3444 (SOT-89), 2SC3444-D (SOT-89), 2SD1622 (SOT-89), 2SD1622-R (SOT-89), 2SD602A (SOT-23), 2SD874A (SOT-89), BCP55 (SOT-223), BCP55-16 (SOT-223), BCX55 (SOT-89), BCX55-16 (SOT-89), BSP41 (SOT-223), BSR41 (SOT-89), FMMTA05 (SOT-23), KST05 (SOT-23), MMBTA05 (SOT-23), PZTA05 (SOT-223) and SMBTA05 (SOT-23) is the SMD version of the KTD863-Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
KTD863-Y Transistor in TO-92 Package
The 2SD863-E is the TO-92 version of the KTD863-Y.
Replacement and Equivalent for KTD863-Y transistor