Electrical And Electronic Symbols

An electrical symbol is a small image used to represent an electrical or electronic device or function. They are also known as circuit symbols or schematic symbols as they are used in electrical schematics and diagrams.

Some basic electrical symbols include:

There are many electrical and circuit symbols used internationally around the world. While they are mostly standardized (i.e. the same electronic symbols are used in different countries), you will still find some international differences.

Electrical Symbols

Below is a table of the most commonly used electrical symbols used in circuit diagrams. The symbols are used to represent both active and passive components.

Name of Electrical/Electronic SymbolComponentCircuit Symbol
SourcesBattery Cell
battery cell
Battery
battery
DC Power Supply
dc power supply
Variable DC Power Supply
variable dc power supply
AC Power Supply
ac power supply
ResistorsResistor
resistor
Variable Resistor
variable resistor
Potentiometer, Voltage Divider
Light Dependent Resistor (LDR)
ldr
Filament Bulb
filament bulb
Thermistor
thermistor
Fuse
fuse
CapacitorsCapacitor (Non-Polarised)
non polarised capacitor
Variable Capacitor
variable capacitor
Polarised Capacitor, Electrolytic Capacitor
polarised capacitor
TransformersIron-cored Transformer
iron cored capacitor
Iron-cored Transformer (two Secondary Windings)
iron cored transformer two secondary windings
DiodesJunction Diode
junction diode
Zener Diode
zener diode
Photo Diode
photo diode
Light Emitting Diode (LED)
led
Diode Bridge
diode bridge
Transistorsnpn transistor
npn transistor
pnp Transistor
pnp transistor
n-Type Junction Field Effect Transistor (NJFET)
n type junction
p-Type Junction Field Effect Transistor (PJFET)
p type junction
Integrated CircuitsIntegrated Circuit (IC)
integrated circuit
MetersAmmeter
ammeter
Voltmeter
voltmeter
Galvanometer
galvanometer
Cathode Ray Oscilloscope (CRO)
cro
AmplifiersVoltage Amplifier
voltage amplifier
Operational Amplifier (Op-Amp)
op amp
TransducersMotor
motor
Microphone
microphone
Loudspeaker
loud speaker

Schematic Diagram Symbols

Below is a table of the most commonly used electrical symbols used in schematic diagrams to represent all of the different electronic devices and functions.

Name of Electrical/Electronic SymbolSchematic Symbol
Concealed Wiring
Concealed Wiring
Conduit Wiring
Conduit Wiring
Direct Concealed Wiring
Direct Concealed Wiring
Multiple Conductor Line
Multiple Conductor Line
Tanking Wiring
Tanking Wiring
Cable Termination
Cable Termination
Branching Box
Branching Box
Electrical Appliance
Electrical Appliance
Telecom Indication Socket Outlet
Telecom Indication Socket Outlet
Arial Socket Outlet of TV and Radio
Arial Socket Outlet of TV and Radio
Florescent Lamp
Florescent Lamp
Electric Bell
Electric Bell
Electric Door Opener
Electric Door Opener
Buzzer
Buzzer
Current Impulse Switch
Current Impulse Switch
Electric Line Permanent Point
Electric Line Permanent Point
One Way Single Pole Switch
One Way Single Pole Switch
One Way Two Pole Switch
One Way Two Pole Switch
Two Way Single Pole Switch
Two Way Single Pole Switch
Intermediate Switch
Intermediate Switch
Push Button Switch
Push Button Switch
Single Lamp
Single Lamp
Dreamer Switch
Dreamer Switch
Single Socket Outlet
Single Socket Outlet
Double Socket Outlet
Double Socket Outlet
Arial
Arial
Surface Wiring
Surface Wiring
Electric Motor
Electric Motor
Electric Heater
Electric Heater
Electric Water Heater
Electric Water Heater
Electric Cooking Range
Electric Cooking Range
Refrigerator
Refrigerator
Electrical Wiring Connection Symbol/Mark
Electrical Wiring Connection Symbol/Mark
Terminal Strip
Terminal Strip
Branching Box
Branching Box
Earthing
Earthing
Electric Fuse
Electric Fuse
Electric Lamp
Electric Lamp
Socket Outlet
Socket Outlet
Electric Motor, Single Phase
Electric Motor, Single Phase
Electric Motor, Three Phase
Electric Motor, Three Phase
Electric Cell
Electric Cell
Thermal & Electro magnetic trippers switch three Pole
Thermal & Electro magnetic trippers switch three Pole
Electric Measuring Instrument
Electric Measuring Instrument
Volt Meter
Volt Meter
Electromagnetic Tripper Switch Single Pole
Electromagnetic Tripper Switch Single Pole
Magnetic Conductor with three Main Conduction
Magnetic Conductor with three Main Conduction
Washing Machine
Washing Machine
Dish Washing Machine
Dish Washing Machine
Electric Meter
Electric Meter
House Connection Box
House Connection Box
Push Button Switch
Push Button Switch
Florescent Lamp’s Choke Coil
Florescent Lamp’s Choke Coil
Starter of Florescent Lamp
Starter of Florescent Lamp
Resistor
Resistor
Inductance
Inductance
Capacitor
Capacitor
Stair Case Time Switch
Stair case time switch
Rectifier
Rectifier
Transformer
Transformer
Thermal Tripper Switch, Single Pole
Thermal Tripper Switch, Single Pole
Thermal Tripper Switch Three Pole
Thermal Tripper Switch Three pole
Main Switch
Main Switch
Electric Door Opener
Electric Door Opener
Ear Phone
Ear Phone
Power Pack
Power Pack
Circuit Breaker (MCCB)
Circuit Breaker (MCCB)
Limit Switch
Limit Switchtd
Electromagnet Conductor
Electromagnet Conductor
Electromagnet Relay
Time Lag Relay
Time lag relay
Generator DC
Generator DC
Generator AC
Generator AC
Motor AC & DC
Motor AC & DC
Ampere Meter
Ampere Meter
Manual Multiple Switch single pole.Four way shown in single way.
Microphone
Microphone
Loudspeaker
Loudspeaker
Electro Magnetic
Electro Magnetic
Phase Line
Phase Line
Proper connection Line
Proper connection Line
Neutral Line
Neutral Line
Earth Line
Earth Line
Signal Line
Signal Line
Distribution Box/Panel Board
Distribution Box/Panel Board
Thermal Relay
Thermal Relay
Ceiling Rose
Ceiling Rose
Magnetic Conductor Tripper Three Main Contact
Magnetic Conductor Tripper Three Main Contact
Change Over Switch
Change over switch
Wire Overlay Crossing
Wire overlay crossing
Plug and Socket
Plug and Socket
Two-pin Plug socket(with & without switch)
Two-pin Plug socket
Three-pin Plug socket(with & without switch)
Three-pin Plug socket
Ceiling Lamp Outlet
Ceiling Lamp Outlet
Wall Lamp Outlet
Wall Lamp Outlet
Ceiling Fan
Ceiling Fan
Bracket Fan
Bracket Fan
Exhaust Fan
Exhaust Fan
Fan Regulator
Fan Regulator
Indicator Switch
Indicator Switch
Electromagnet Relay
Electromagnet Relay
Lamp (with Bracket)
Lamp with Bracket
AC Current
AC Current
Direct and Alternating Current
Direct and Alternating Current
Movable Iron Type Machine
Main Fuse Board (without Switch)
Main Fuse Board without Switch
Main Fuse Board (with Switch)
Main Fuse Board with Switch
Switchless Distribution Fuse Board
Switchless distribution fuse Board
Distribution Fuse Board(with switch)
Distribution Fuse Board with switch
Air Circuit Breaker
Air Circuit Breaker
Oil Circuit Breaker
Oil Circuit Breaker
Relay
Relay
Lighting Arrester
Lighting Arrester
Starter (Motor)
Starter Motor
Star Delta Starter
Star Delta Starter
Emersion Heater
Emersion Heater
Hanging Lamp
Hanging Lamp
Water Type Lamp
Water type lamp
DC Current
DC Current
Movable Permanent Magnetic Type Machine
Movable permanent magnetic type machine
Battery
Battery

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