Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-220F
Pinout of 2SD1273AO
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SD1273AO transistor can have a current gain of 1200 to 2500. The gain of the 2SD1273A will be in the range from 500 to 2500, for the 2SD1273AP it will be in the range from 800 to 1500, for the 2SD1273AQ it will be in the range from 500 to 1000.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SD1273AO might only be marked "D1273AO".
Replacement and Equivalent for 2SD1273AO transistor