Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KSA1156Y transistor can have a current gain of 100 to 200. The gain of the KSA1156 will be in the range from 30 to 200, for the KSA1156N it will be in the range from 30 to 60, for the KSA1156O it will be in the range from 60 to 120, for the KSA1156R it will be in the range from 40 to 80.
SMD Version of KSA1156Y transistor
The PBHV9040T (SOT-23), PBHV9040X (SOT-89), PBHV9040Z (SOT-223) and STR2550 (SOT-23) is the SMD version of the KSA1156Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
Replacement and Equivalent for KSA1156Y transistor