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close this bookCircuits, Formulas and Tables Electrical Engineering - Basic vocational knowledge (Institut für Berufliche Entwicklung, 201 p.)
close this folder1. Selected Graphical Symbols of Electrotechnology
View the document1.1. Graphical Symbols for General Circuit Elements
View the document1.2. Graphical Symbols for Types of Current, Voltage and Connections
View the document1.3. Graphical Symbols for Lines and Line Connections
View the document1.4. Graphical Symbols for Resistors
View the document1.5. Graphical Symbols for Capacitors
View the document1.6. Graphical Symbols for Coils and Transformers
View the document1.7. Graphical Symbols for Current and Voltage Transformers
View the document1.8. Graphical Symbols for Electrochemical and Electrothermal Sources
View the document1.9. Graphical Symbols for Tubes
View the document1.10. Graphical Symbols for Semiconductors
View the document1.11. Graphical Symbols for Switching Devices
View the document1.12. Graphical Symbols for Machines
View the document1.13. Graphical Symbols for Meter Movements and Measuring Instruments
View the document1.14. Graphical Symbols of Electroacoustics
View the document1.15. Graphical Symbols for Wiring Plans

1.10. Graphical Symbols for Semiconductors


Graphical Symbol

in full



point contact transistor or junction transistor, type p-n-p

n-p-n transistor

Semiconductor diodes

diode with rectifying function


capacity diode

tunnel diode

avalanche rectifier diode

avalanche rectifier diode with avalanche effect in both directions

backward diode



backward blocking

backward conducting

n-type gate, controlled at anode side

p-type gate, controlled at cathode side

Semiconductor elements which can be influenced by light

photoresistance cell


photocell with depletion layer

phototriode p-n-p

switching diode p-n-p-n

Semiconductor circuits

switching diode p-n-p-n

semiconductor valves in bridge connection