High Voltage Warning
Warning symbol indicating the presence of high-voltage electrical hazards.
International · c. 1970 – present
IEC
IEC prepares and publishes international standards for electrical, electronic, and related technologies.
5 symbols in this standard
Electrical Ground Symbol
Schematic symbol representing an electrical connection to earth ground.
International · c. 1900 – present
Resistor Symbol
Schematic symbol representing an electrical resistor in circuit diagrams.
International · c. 1920 – present
Capacitor Symbol
Schematic symbol representing an electrical capacitor in circuit diagrams.
International · c. 1920 – present
Power Symbol (IEC 5009)
Standardized symbol for power on/off controls on electronic devices.
International · c. 1970 – present