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Electrical Components and Their Symbols
Wires and Traces
Component Name | Symbol |
---|---|
Wires or Conductor | ![]() |
Trace Junction or Connected Wires | ![]() |
Trace Crossing or Unconnected Wires | ![]() |
Grounds
Component Name | Symbol |
---|---|
Ground or Earth | ![]() |
Signal Ground | ![]() |
Chassis Ground | ![]() |
Sources
Component Name | Symbol |
---|---|
Single Cell | ![]() |
Battery (Combination of cells) | ![]() |
Photovoltaic Cell (Solar Cell) | ![]() |
Independent or Constant Voltage Source | ![]() |
Controlled or Dependent Voltage Source | ![]() |
Independent or Constant Current Source | ![]() |
Controlled or Dependent Current Source | ![]() |
AC voltage Source | ![]() |
Resistors
Component Name | Symbol |
---|---|
Fixed Resistor | ![]() |
Rheostat (Variable Resistor) | ![]() |
Potentiometer | ![]() |
Thermistor or Varistor | ![]() |
Capacitors
Component Name | Symbol |
---|---|
Non-polarized Capacitor | ![]() |
Polarized Capacitor | ![]() |
Variable Capacitor | ![]() |
Trimmer Capacitor | ![]() |
Inductors
Component Name | Symbol |
---|---|
Air Cored Inductor | ![]() |
Iron Cored Inductor | ![]() |
Tapped Inductor | ![]() |
Transformers
Component Name | Symbol |
---|---|
Transformer | ![]() |
Center Tapped Transformer | ![]() |
Step up Transformer | ![]() |
Step Down Transformer | ![]() |
Transformer with two secondary windings | ![]() |
Current Transformer | ![]() |
Potential Transformer | ![]() |
Zero Sequence Current Transformer (ZSCT) | ![]() |
Diodes
Component Name | Symbol |
---|---|
PN Junction Diode | ![]() |
Schottky Diode | ![]() |
Zener Diode | ![]() |
Light Emitting Diode (LED) | ![]() |
Photo Diode | ![]() |
Tunnel Diode | ![]() |
Varicap (Variable Capacitor Diode) | ![]() |
Schockley Diode | ![]() |
Constant Current Diode | ![]() |
Silicon Controlled Rectifier (SCR) | ![]() |
Diac | ![]() |
Transistors
Component Name | Symbol |
---|---|
N-channel, Junction Field Effect Transistor ( JFET) | ![]() |
P-channel, Junction Field Effect Transistor (JFET) | ![]() |
Metal Oxide Semiconductor Field Effect Transistor (MOSFET) | ![]() |
Enhancement Mode, N-channel MOSFET | ![]() |
Enhancement Mode, P-channel MOSFET | ![]() |
Bipolar Transistors
Component Name | Symbol |
---|---|
NPN Bipolar Junction Transistor (BJT) | ![]() |
PNP Bipolar Junction Transistor (BJT) | ![]() |
Vacuum Tubes
Component Name | Symbol |
---|---|
Vacuum Tube Diode | ![]() |
Vacuum Tube Triode | ![]() |
Vacuum Tube Tetrode | ![]() |
Vacuum Tube Pentode | ![]() |
Switches
Component Name | Symbol |
---|---|
Single Pole Single Throw (SPST) Switch | ![]() |
Single Pole Double Throw (SPDT) Switch | ![]() |
Double Pole Single Throw (DPST) Switch | ![]() |
Normally Open (NO) Push Button Switch | ![]() |
Normally Closed (NC) Push Button Switch | ![]() |
Relay Switch | ![]() |
Lamps
Component Name | Symbol |
---|---|
Indicating Lamp | ![]() |
Neon Lamp | ![]() |
Light Bulb | ![]() |
Current Limiters
Component Name | Symbol |
---|---|
IEC Fuse | ![]() |
IEEE/ANSI Fuse | ![]() |
Electro – Acoustic Devices
Component Name | Symbol |
---|---|
Microphone (IEC Standard) | ![]() |
Microphone (IEEE Standard) | ![]() |
Buzzer | ![]() |
Loudspeaker | ![]() |
Antennas
Component Name | Symbol |
---|---|
Antenna | ![]() |
Dipole Antenna | ![]() |
Loop Antenna (IEC Standard) | ![]() |
Loop Antenna (IEEE Standard) | ![]() |
Logic Gates
Component Name | Symbol |
---|---|
OR | ![]() |
AND | ![]() |
NOT | ![]() |
NAND | ![]() |
NOR | ![]() |
XOR | ![]() |
XNOR | ![]() |
Miscellaneous Devices
Component Name | Symbol |
---|---|
Voltmeter | ![]() |
Ammeter | ![]() |
Galvanometer | ![]() |
Electric Motor | ![]() |
Crystal Oscillator | ![]() |
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