Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-220F
Pinout of 2SB1250
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB1250 transistor can have a current gain of 5000 to 30000. The gain of the 2SB1250-P will be in the range from 5000 to 15000, for the 2SB1250-Q it will be in the range from 8000 to 30000.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB1250 might only be marked "B1250".
Complementary NPN transistor
The complementary NPN transistor to the 2SB1250 is the 2SD1890.