Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-126
Pinout of 2SD1725
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SD1725 transistor can have a current gain of 70 to 400. The gain of the 2SD1725-Q will be in the range from 70 to 140, for the 2SD1725-R it will be in the range from 100 to 200, for the 2SD1725-S it will be in the range from 140 to 280, for the 2SD1725-R it will be in the range from 200 to 400.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SD1725 might only be marked "D1725".
Complementary PNP transistor
The complementary PNP transistor to the 2SD1725 is the 2SB1168.
SMD Version of 2SD1725 transistor
The BDP953 (SOT-223) and BDP955 (SOT-223) is the SMD version of the 2SD1725 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.