Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-262
Pinout of 2SB1270
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB1270 transistor can have a current gain of 70 to 280. The gain of the 2SB1270-Q will be in the range from 70 to 140, for the 2SB1270-R it will be in the range from 100 to 200, for the 2SB1270-S it will be in the range from 140 to 280.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB1270 might only be marked "B1270".
Complementary NPN transistor
The complementary NPN transistor to the 2SB1270 is the 2SD1906.
SMD Version of 2SB1270 transistor
The BDP952 (SOT-223) is the SMD version of the 2SB1270 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.