Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-220
Pinout of 2SC3780
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SC3780 transistor can have a current gain of 40 to 320. The gain of the 2SC3780-C will be in the range from 40 to 80, for the 2SC3780-D it will be in the range from 60 to 120, for the 2SC3780-E it will be in the range from 100 to 200, for the 2SC3780-F it will be in the range from 160 to 320.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SC3780 might only be marked "C3780".
Complementary PNP transistor
The complementary PNP transistor to the 2SC3780 is the 2SA1474.