Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-126
Pinout of 2SD414
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SD414 transistor can have a current gain of 40 to 320. The gain of the 2SD414-P will be in the range from 160 to 320, for the 2SD414-Q it will be in the range from 100 to 200, for the 2SD414-R it will be in the range from 60 to 120, for the 2SD414-S it will be in the range from 40 to 80.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SD414 might only be marked "D414".
Complementary PNP transistor
The complementary PNP transistor to the 2SD414 is the 2SB548.