Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-126
Pinout of 2SB731-L
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB731-L transistor can have a current gain of 135 to 270. The gain of the 2SB731 will be in the range from 135 to 600, for the 2SB731-E it will be in the range from 360 to 600, for the 2SB731-F it will be in the range from 300 to 480, for the 2SB731-K it will be in the range from 200 to 400.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB731-L might only be marked "B731-L".