Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-3PF
Pinout of 2SB1054
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB1054 transistor can have a current gain of 40 to 200. The gain of the 2SB1054-P will be in the range from 100 to 200, for the 2SB1054-Q it will be in the range from 60 to 120, for the 2SB1054-R it will be in the range from 40 to 80.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB1054 might only be marked "B1054".
Complementary NPN transistor
The complementary NPN transistor to the 2SB1054 is the 2SD1485.
SMD Version of 2SB1054 transistor
The BDP954 (SOT-223) is the SMD version of the 2SB1054 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.