Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-92
Pinout of 2N3391
The 2N3391 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads. Here is an image showing the pin diagram of this transistor.
SMD Version of 2N3391 transistor
The BC818 (SOT-23), BC818-40 (SOT-23), BC818-40W (SOT-323) and BC818W (SOT-323) is the SMD version of the 2N3391 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.