Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KTD2059Y transistor can have a current gain of 120 to 240. The gain of the KTD2059 will be in the range from 40 to 240, for the KTD2059O it will be in the range from 70 to 140, for the KTD2059R it will be in the range from 40 to 80.
Complementary PNP transistor
The complementary PNP transistor to the KTD2059Y is the KTB1367Y.
SMD Version of KTD2059Y transistor
The BDP953 (SOT-223) is the SMD version of the KTD2059Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
Replacement and Equivalent for KTD2059Y transistor