Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KSD880-G transistor can have a current gain of 150 to 300. The gain of the KSD880 will be in the range from 60 to 300, for the KSD880-O it will be in the range from 60 to 120, for the KSD880-Y it will be in the range from 100 to 200.
SMD Version of KSD880-G transistor
The BDP949 (SOT-223) and FZT692B (SOT-223) is the SMD version of the KSD880-G transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
Replacement and Equivalent for KSD880-G transistor