Electronic Components Symbols

Resistors

Thermistor

IEC-style resistor

American style resistor , Rheostat (Variable Resistor) , Potentiometer 

Capacitors

Capacitor, variable

Capacitor, polarized (American) 

Capacitor

Transistors

n-channel junction gate field-effect transistor (JFET)

NPN transistor

PNP transistor

p-channel junction gate field-effect transistor (JFET)

Metal-Oxide-Semiconductor Field-Effect Transistor

Diodes

Diode

Light Emitting Diode (LED)

Schottky diode

Tunnel diode

Varicap

Photodiode

Zener diode

Vacuum tubes

Vacuum tube pentode

Vacuum tube tetrode

Vacuum tube triode

Vacuum tube diode

Switches

Switch, Double Pole/Double Throw 

Switch, Single Pole/Double Throw 

Switch, Single Pole/Single Throw

Circuit Breakers

Molded Case Circuit Breaker 

Transformers

Transformer with center tap

Current Transformer

Bushing-Type Current Transformer

Voltage Transformer

Zero-Sequence Current Transformer

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