Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-220F
Pinout of 2SB1019
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB1019 transistor can have a current gain of 70 to 240. The gain of the 2SB1019-O will be in the range from 70 to 140, for the 2SB1019-Y it will be in the range from 120 to 240.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB1019 might only be marked "B1019".
Complementary NPN transistor
The complementary NPN transistor to the 2SB1019 is the 2SD1412.