Transistor Symbols

Symbol Component Name Description
NPN Bipolar Transistor Allows current flow when high potential at base (middle)
PNP Bipolar Transistor Allows current flow when low potential at base (middle)
Darlington Transistor Made from 2 bipolar transistors. Has total gain of the product of each gain.
JFET-N Transistor N-channel field effect transistor
JFET-P Transistor P-channel field effect transistor
NMOS Transistor N-channel MOSFET transistor
PMOS Transistor P-channel MOSFET transistor