Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-220
Pinout of 2SD812
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SD812 transistor can have a current gain of 40 to 200. The gain of the 2SD812-P will be in the range from 100 to 200, for the 2SD812-Q it will be in the range from 60 to 120, for the 2SD812-R it will be in the range from 40 to 80.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SD812 might only be marked "D812".
Complementary PNP transistor
The complementary PNP transistor to the 2SD812 is the 2SB747.
SMD Version of 2SD812 transistor
The BDP951 (SOT-223) is the SMD version of the 2SD812 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.