.

Common Electrical and Electronics SymbolsElectrical Symbols

Wires Symbols

Symbol Name Description

Electrical Wire It is the symbol that is used to represent a wire.

Connected Wires This Symbol represents the wire connected crossing.

Not Connect Wires This Symbol shows that wires are not connected on crossing.

Switches Symbols

Symbol Name Description

It is the symbol of a switch that disconnects current when

SPST Toggle Switch
open.

SPDT Toggle Switch This Symbol of switch selects between two connections.

It is a symbol that denotes Momentary switch - normally

Push Button (N.O)
open.
 Push Button Switch This denotes the symbol of a Momentary switch - normally
(N.C) closed.

It is the symbol of the DIP switch which is used for onboard

DIP Switch
configuration.

Relays

Symbol Name Description

This shows the symbol of relay that close connection by an

SPST Relay
electromagnet.

This shows the symbol of relay that open connection by an

SPDT Relay
electromagnet.

Earthing

Symbol Name Description

This Symbol is used for zero potential reference and electrical

Earth Ground
shock protection.
 Chassis Ground This symbol shows the wire Connected to the chassis of the circuit.

Digital Ground It refers to the reference voltage of digital-analog if.

Inductors

Symbol Name Description

Indicator Symbol of a Coil / solenoid that generates a magnetic field.

Iron Core Inductor It is the symbol of the iron core Inductor Which Includes iron.

Variable Inductor It is the coil or solenoid that has a Variable magnetic field.

Motor and Transformer

Symbol Name Description

Symbol of motor, which changes electric energy to kinetic
Motor
energy.
 Transformer changes AC voltage from high to low or low to
AC Transformer
high.

Watch this video to learn more about electrical plan symbols. If the video doesn't play, please
visit it at YouTube.

2.2 Electronics Symbols

An electronic symbol is a pictogram used to represent various electrical and electronic devices or
functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or
electronic circuit.
Electronic symbols are also known as symbol schematics because they are used in an electronic
circuit schematic.

Resistance

Symbol Name Description

Variable Resistance It is the symbol of an adjustable resistor which has 2 terminals.

Potentiometer It is the symbol of an adjustable resistor that has 3 terminals.

It is the symbol of a trimmer which is also known as a Preset

Trimmer Resistor
resistor.

It is the symbol of a Thermal resistor that changes the

Thermistor
resistance when temperature changes.
 It is the symbol of Photo-resistor - change resistance with light
Photoresistor
intensity change.

Diode

Symbol Name Description

Diode allows current flow in one direction only - left (anode) to

Diode
the right (cathode).

It allows current flow in one direction, but also can flow in the
Zener Diode
reverse direction when above breakdown volt.

Schottky Diode Schottky diode is a diode with a low voltage drop.

Varicap Diode This represents the varicap diode. Variable capacitance diode.

Light Emitting
LED emits light when current flows through it.
Diode

This is the symbol of Photodiode that allows current flow when

Photodiode
exposed to light.

Capacitor

Symbol Name Description

Capacitor is used to store electric charge. It acts as a short circuit

Capacitor
with AC and an open circuit with DC.
 Variable
The Symbol represent the adjustable capacitance.
Capacitor

Sources

Symbol Name Description

It is the symbol of a voltage Source which generates constant

Voltage Source
voltage.

It is the symbol of a current Source which generates constant

Current Source
current.

AC Voltage Source This symbol shows the AC Voltage Source.

Battery Cell It is the symbol of single cell use to generate constant volt.

It is the symbol of a battery which is the combination of two

Battery
or more cells.
 Controlled Voltage It is the symbol of a constant voltage Source that gives
Source controllable voltage at the output.

Controlled Current It represents the controlled Current source which gives

Source controllable current at the output.

Meter Symbols

Symbol Name Description

It is the symbol that shows Voltmeter which is used to measure

Voltmeter
the voltage.

It represents the ammeter whose work is to measure the current in

Ammeter
the circuit.

It is the symbol of the ohmmeter which is needed to measure the

Ohmmeter
value of a resistor.

This represents the power meter which shows the power

Wattmeter
consumption.

Converter and Amplifier Symbols

Symbol Name Description

 Operational Amplifier This operational gives Amplify input signal.

Analog to Digital This is the symbol of ATD converts analog signal to

Converter digital numbers.

Digital to Analog This is the symbol of DTA converts digital numbers to

Converter analog signals.

Transistors Symbols

Symbol Name Description

NPN Bipolar It allows current flow when the high potential is at the base
Transistor (middle).

PNP Bipolar It allows current flow when the low potential is at the base
Transistor (middle) of the symbol.
 Darlington It is made from 2 bipolar transistors. Has total gain of the
Transistor product of each gain.

JFET-N Transistor Symbol of JFET N-channel field effect transistor.

This is the symbol of JFET P which is a P-channel effect

JFET-P Transistor
transistor.

NMOS Transistor This is a symbol of Mosfet N-channel MOSFET transistor.

PMOS Transistor This is a symbol of Mosfet P-channel MOSFET transistor.

Utility Symbols

Symbol Name Description

BUZZER Produce a buzzing sound when current flows through it.

 Electric Bell This is the symbol of Bell which Rings when activated.

The fuse disconnects when current above the threshold---used to

Fuse
protect a circuit from high currents.

Bus The bus symbol contains several wires. usually for data / address.

Loudspeaker Convert electrical signal to sound waves.

Microphone Microphone Converts sound waves to the electrical signal.

This is the symbol of a lamp that glows when current flows

Lamp/Light Bulb
through it.

Logic Gates and Multiplexer Symbols

Symbol Name Description

Not Gate This is the symbol of NOT Gate. Output 1 when input is 0.
 This is the symbol of AND Gate. Output 1 when both inputs are
AND Gate
1.

This shows NAND Gate, which Outputs 0 when both inputs are
NAND Gate
1. (NOT + AND).

This symbol shows or Gate, which Outputs 1 when any input is

OR Gate
1.

Symbol of XOR Gate, which Outputs 1 when inputs are different.

XOR Gate
(Exclusive OR).

Symbol of the multiplexer. Connect the output to the selected

Multiplexer
input line.

This shows DE multiplexer.Connect selected output to the input

DE multiplexer
line.

This shows Optocoupler. Optocoupler isolates connection to

Optocoupler
other board.

2.3. Electrical Symbols Chart and PDF

We have created a printable Electrical Symbols Chart PDF file that you can download and
print if you wish to have a quick reference. You can download the file by clicking on the Image
below.
Click the image to download Electrical Symbols Chart PDF

3. Expert Tips for Using Electrical Schematic Symbols

So in the upward table shows you all the electrical schematic Symbols and electronic symbols
which are needed to create a circuit diagram with their name and description. Now you can draw
any circuit diagram easily with the help of this symbol.

Here are the tips for using these symbols.

3.1 Use a Professional Electrical Diagramming Tool

If you want to maximize your efficiency and come up with visually appealing diagrams, then
consider using EdrawMax Online. Open EdrawMax Online and go to the Library first, then click
on the Electrical. There you get all components' names, select which you need to take.