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'''Electronic symbols''' are graphical representations used to depict electronic components, devices, and circuits in circuit diagrams and schematics. These symbols help engineers, technicians, and hobbyists communicate and understand the design and functionality of electronic circuits. Electronic symbols should be intuitive, allowing users to grasp their meaning at a glance. It's essential to understand these symbols when reading or creating circuit diagrams to design and troubleshoot electronic circuits.
'''Electronic symbols''' ... not intended to be comprehensive ...


A reference designator is a component label on a schematic diagram to identify and differentiate between components. It usually consists of a letter indicating the type of component (e.g., "R" for resistor, "C" for capacitor, "D" for diode) followed by a unique number, such as "R1," "C2," or "D3".
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{|class="wikitable"

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!Component!!Unit!!colspan=2|Symbol
The symbols are standardized, and various organizations, such as the International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE), provide guidelines for their use. The standards are not always strictly adhered to.

== Examples of electronic symbols ==
The following is a selection of some of the most common symbols.

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{| class="wikitable"
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!Component!!Reference designator!!Unit!! colspan="2" |Symbol
|-
|-
| Resistor||Ohm||[[File:Resistor h wikisch.svg|100px]]||[[File:Resistor symbol Europe.svg|100px]]
| Resistor, IEEE and IEC style||R||Ohm||[[File:Resistor h wikisch.svg|100px]]||[[File:Resistor symbol Europe.svg|100px]]
|-
|-
| Potentiometer||Ohm||[[File:Pot schemA.svg|100px]]||[[File:Potentiometer symbol Europe.svg|100px]]
| Potentiometer, IEEE and IEC style||RV||Ohm||[[File:Pot schemA.svg|100px]]||[[File:Potentiometer symbol Europe.svg|100px]]
|-
|-
| Pre-set resistor||Ohm||Preset Resistor.svg
| Trimmer resistor, IEC style||RT||Ohm|| colspan="2" |[[File:Preset resistor transparent body.svg|100px|center]]
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|-
| Variable resistor||Ohm||
|-
|-
| Capacitor||Farad||
| Capacitor||C||Farad|| colspan="2" |[[File:One non-polarized capacitor symbol.svg|40px|center]]
|-
|-
| Polarised capacitor||Farad||
| Polarised capacitor||C||Farad|| colspan="2" |[[File:Three polarized capacitor symbols.svg|170px|center]]
|-
|-
| Variable capacitor||Farad||
| Variable capacitor||CV||Farad|| colspan="2" |[[File:Symbol Capacitor (changeable).svg|70px|center]]
|-
|-
| Trimmer capacitor||CT||Farad|| colspan="2" |[[File:Symbol Capacitor (setable).svg|70px|center]]
| Inductor||Henry||
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|-
| Inductor||L||Henry|| colspan="2" |[[File:Inductor.svg|70px|center]]
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|-
| Magnetic core inductor||L||Henry|| colspan="2" |[[File:IEC Inductor with magnetic core.svg|70px|center]]
|-
|-
| Transformer with two secondary windings||T|| — || colspan="2" |[[File:Transformer two secondary windings.svg|70px|center]]
| Inductor with core||Henry||
|-
|-
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| Quartz crystal||X or XTAL||Herz|| colspan="2" |[[File:Crystal-oscillator-IEC-Symbol.svg|70px|center]]
| Transformer|| — ||
|-
|-
| Diode||D|| — ||[[File:Diode01.svg|70px|center]]||[[File:Diode01s.svg|70px|center]]
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| Quartz crystal||Herz||colspan=2|[[File:IEEE 315 Fundamental Items Symbols (113).svg|100px]]
|-
|-
| Diode|| — ||
| Schottky diode|| D or SD|| — ||[[File:Diode09.svg|70px|center]]||[[File:Diode09s.svg|70px|center]]
|-
|-
| Varactor diode|| — ||
| Zener diode||Z or D|| — ||[[File:Zener diode symbol-2.svg|70px|center]]||[[File:Symbol Z-Diode.svg|100px|center]]
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|-
| Varactor diode||VD or D|| — ||[[File:Diode06.svg|70px|center]]||[[File:Diode06s.svg|70px|center]]
|-
|-
| LED|| — ||
| LED||D or LED|| — ||[[File:Diode08.svg|70px|center]]||[[File:Symbol_LED.svg|70px|center]]
|-
|-
| NPN transistor|| — ||
| NPN bipolar junction transistor||Q|| — ||[[File:BJT NPN symbol (case, unlabelled).svg|50px|center]]||[[File:Transistor symbol npn no circle.svg|50px|center]]
|-
|-
| PNP bipolar junction transistor||Q|| — ||[[File:BJT PNP symbol (case, unlabelled).svg|70px|center]]||[[File:Transistor symbol pnp no circle.svg|70px|center]]
| FET|| — ||
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|-
| N-channel JFET||Q|| — || colspan="2" |[[File:JFET N-Channel.svg|70px|center]]
|-
| P-channel JFET||Q|| — || colspan="2" |[[File:JFET P-Channel.svg|70px|center]]
|-
| Operational Amplifier||U (for any IC)|| — || colspan="2" |[[File:Op-amp symbol simplified.svg|100px|center]]
|-
|-
| Microphone, IEEE and IEC style||MIC||Ohm||[[File:IEEE MIC.svg|50px|center]]||[[File:IEC MIC.svg|50px|center]]
| Earphone|| — ||
|-
|-
| Loudspeaker||LS or SPKR||Ohm|| colspan="2" |[[File:IEEE Loudspeaker.svg|50px|center]]
| Microphone||Ohm||
|-
|-
| Single cell and battery||B or BAT||Volt||[[File:Battery symbol1.svg|50px|center]]||[[File:Battery symbol2.svg|50px|center]]
| Loudspeaker||Ohm||
|-
|-
| Incandescent light bulb||L or FIL||Watt|| colspan="2" |[[File:Lamp symbol.svg|100px|center]]
| Cell||Volt||
|-
|-
| Voltmeter and ammeter||V and A|| ||[[File:Symbole voltmetre.png|100px|center]]||[[File:Symbole amperemetre.png|100px|center]]
| Battery||Volt||
|-
| Push-to-make switch, push-to break switch, IEEE style||SW (with type)|| — ||[[File:IEEE push to make switch symbol.svg|50px|center]]||[[File:IEEE push to break switch symbol.svg|50px|center]]
|-
| SPST and SPDT switch||SW (with type)|| — ||[[File:SPST-Switch.svg|100px|center]]||[[File:3wayswitchR.svg|100px|center]]
|-
| DPST and DPDT switch||SW (with type)|| — ||[[File:DPST-symbol.svg|100px|center]]||[[File:DPDT-symbol.svg|100px|center]]
|-
| DPST and DPDT relay||K (with type)|| — ||[[File:SPDT relay symbol.svg|50px|center]]||[[File:DPDT relay symbol.svg|50px|center]]
|-
| TS and TRS jack socket||TS and TRS|| — ||[[File:TS phone connector symbol.svg|100px|center]]||[[File:TRS phone connector symbol.svg|100px|center]]
|-
| DC barrel connector, positive tip||J|| — || colspan="2" |[[File:Positive Tip Plug.svg|100px|center]]
|-
| Voltage source and current source||V and I|| — ||[[File:Voltage Source.svg|100px|center]]||[[File:Current Source.svg|100px|center]]
|-
| Fuse, IEEE and IEC style||F||Amp||[[File:IEEE style fuse.svg|100px|center]]||[[File:IEC style fuse.svg|100px|center]]
|-
|-
| Antenna||A|| — || colspan="2" |[[File:IEC Antenna.svg|30px|center]]
| Lamp bulb||Watt||
|-
|-
| SPST switch|| — ||
| Earth||GND or EARTH|| — || colspan="2" |[[File:IEC style earth.svg|50px|center]]
|-
|-
| DPST switch|| — ||
| Chassis ground||GND or CHASSIS|| — || colspan="2" |[[File:IEC style chassis ground.svg|50px|center]]
|-
|-
| Wires crossing and junction|| — || — ||[[File:Wire Cross.svg|50px|center]]||[[File:Wire E.svg|50px|center]]
| Fuse||Amp||
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|-
| Antenna|| — ||
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|-
| Earth|| — ||
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|-
| Chassis ground|| — ||
|}
|}
<!--

== See also ==
== See also ==
== References ==
== References ==
{{reflist}}
{{reflist}}
== Further reading ==
== Further reading == -->
== External links ==
== External links ==
* [https://en.wikipedia.org/wiki/Electronic_symbol Electronic symbol], Wikipedia
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[[Category:Electronic symbols]]

{{stub}}
{{Footer navigation
| previous = Units of measurement
| next = Schematics
}}

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[[Category:Units and symbols]]

Latest revision as of 14:54, 18 June 2024

Electronic symbols are graphical representations used to depict electronic components, devices, and circuits in circuit diagrams and schematics. These symbols help engineers, technicians, and hobbyists communicate and understand the design and functionality of electronic circuits. Electronic symbols should be intuitive, allowing users to grasp their meaning at a glance. It's essential to understand these symbols when reading or creating circuit diagrams to design and troubleshoot electronic circuits.

A reference designator is a component label on a schematic diagram to identify and differentiate between components. It usually consists of a letter indicating the type of component (e.g., "R" for resistor, "C" for capacitor, "D" for diode) followed by a unique number, such as "R1," "C2," or "D3".

The symbols are standardized, and various organizations, such as the International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE), provide guidelines for their use. The standards are not always strictly adhered to.

Examples of electronic symbols

The following is a selection of some of the most common symbols.

Component Reference designator Unit Symbol
Resistor, IEEE and IEC style R Ohm
Potentiometer, IEEE and IEC style RV Ohm
Trimmer resistor, IEC style RT Ohm
Capacitor C Farad
Polarised capacitor C Farad
Variable capacitor CV Farad
Trimmer capacitor CT Farad
Inductor L Henry
Magnetic core inductor L Henry
Transformer with two secondary windings T  — 
Quartz crystal X or XTAL Herz
Diode D  — 
Schottky diode D or SD  — 
Zener diode Z or D  — 
Varactor diode VD or D  — 
LED D or LED  — 
NPN bipolar junction transistor Q  — 
PNP bipolar junction transistor Q  — 
N-channel JFET Q  — 
P-channel JFET Q  — 
Operational Amplifier U (for any IC)  — 
Microphone, IEEE and IEC style MIC Ohm
Loudspeaker LS or SPKR Ohm
Single cell and battery B or BAT Volt
Incandescent light bulb L or FIL Watt
Voltmeter and ammeter V and A
Push-to-make switch, push-to break switch, IEEE style SW (with type)  — 
SPST and SPDT switch SW (with type)  — 
DPST and DPDT switch SW (with type)  — 
DPST and DPDT relay K (with type)  — 
TS and TRS jack socket TS and TRS  — 
DC barrel connector, positive tip J  — 
Voltage source and current source V and I  — 
Fuse, IEEE and IEC style F Amp
Antenna A  — 
Earth GND or EARTH  — 
Chassis ground GND or CHASSIS  — 
Wires crossing and junction  —   — 

External links

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