Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-3P
Pinout of 2SC3181
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SC3181 transistor can have a current gain of 55 to 160. The gain of the 2SC3181-O will be in the range from 55 to 160, for the 2SC3181-R it will be in the range from 55 to 110.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SC3181 might only be marked "C3181".
Complementary PNP transistor
The complementary PNP transistor to the 2SC3181 is the 2SA1264.