Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-220
Pinout of 2SB601
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB601 transistor can have a current gain of 2000 to 15000. The gain of the 2SB601-K will be in the range from 5000 to 15000, for the 2SB601-L it will be in the range from 3000 to 7000, for the 2SB601-M it will be in the range from 2000 to 5000.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB601 might only be marked "B601".
Complementary NPN transistor
The complementary NPN transistor to the 2SB601 is the 2SD560.