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. These symbols are largely standardized internationally today, but may vary from country to country, or engineering discipline, based on traditional conventions.

Content from Wikipedia : Electronic symbol

Standards for symbols

The graphic symbols used for electrical components in circuit diagrams are covered by national and international standards, in particular:

IEC 60617 (also known as BS 3939).

• IEC 60617 (also known as BS 3939).

• There is also IEC 61131-3 – for ladder-logic symbols.

• JIC JIC (Joint Industrial Council) symbols as approved and adopted by the NMTBA (National Machine Tool Builders Association). They have been extracted from the Appendix of the NMTBA Specification EGPl-1967.

• ANSI Y32.2-1975 (also known as IEEE Std 315-1975 or CSA Z99-1975).

• IEEE Std 91/91a: graphic symbols for logic functions (used in digital electronics). It is referenced in ANSI Y32.2/IEEE Std 315.

• Australian Standard AS 1102 (based on a slightly modified version of IEC 60617; withdrawn without replacement with a recommendation to use IEC 60617).

The number of standards leads to confusion and errors. Symbols usage is sometimes unique to engineering disciplines, and national or local variations to international standards exist. For example, lighting and power symbols used as part of architectural drawings may be different from symbols for devices used in electronics.

Common electronic symbols

1Traces

2Grounds

3Sources

4Resistors

5Capacitors

6Diodes

   6.1Bridge rectifiers

7Inductors

8Transformers

9Transistors

   9.1Bipolar

   9.2Unipolar

10Vacuum tubes

11Switches

12Relays

13Lamps

14Current limiters

15Electro-acoustic devices

16Antennas

17Cables

18Connectors

19ICs

   19.1Logic gates

   19.2Flip-flops

   19.3OpAmps

20Oscillators

Historical electronic symbols