Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-92MOD
Pinout of 2SA1273
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SA1273 transistor can have a current gain of 100 to 320. The gain of the 2SA1273 will be in the range from 100 to 320, for the 2SA1273-O it will be in the range from 100 to 200, for the 2SA1273-Y it will be in the range from 160 to 320.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SA1273 might only be marked "A1273".
Complementary NPN transistor
The complementary NPN transistor to the 2SA1273 is the 2SC3205.
SMD Version of 2SA1273 transistor
The 2SA1203 (SOT-89), FMMT549 (SOT-23) and KTA1663 (SOT-89) is the SMD version of the 2SA1273 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.