Transistors are useful electronic devices typically used as switches or amplifiers. By amplifying a small base-current, these neat little devices are able to drive medium-power electronics such as small motors, solenoids, or high-power LEDs. They're so handy that they come in a pack of 10! They're manufactured in two types: NPN and PNP, and this listing is for the PNP-type 2N3906.
The model of this transistor (2N3906) has the standard EBC pinout. The 2N3906s can switch up to 40V at peak currents of 1A (0.2A continuous), with a DC gain of about 100. For more details, please consult the datasheet.