2N3906 PNP Bipolar Junction Transistor Used For Low-Power Amplification And Switching

A PNP bipolar junction transistor rated at 40V collector-emitter and 200 mA collector current, used for low power amplification and switching, and the standard PNP complement to the 2N3904. As a PNP device it conducts when its base is pulled low, which suits high side switching from a positive rail. Always fit a base resistor when driving it from a microcontroller pin - connecting a base directly to a logic output will damage both. A common starting value is 1K for switching applications. 40V and 200 mA rating suits moderate loads; TO-92 through-hole package fits breadboards; Very low cost and widely documented; Standard pinout for the 2N3906 family