Schematic Diagram Reference
Standard Electrical & Schematic Symbols Chart
Visual reference guide to standard ANSI and IEC schematic symbols for power sources, passive components, semiconductors, switches, grounding, and meters.
DC Voltage Source / Battery
Power SourcesDirect current constant voltage supply or electrochemical battery.
AC Voltage Source
Power SourcesSinusoidal alternating current electrical power generator.
Resistor (ANSI / US)
PassiveStandard zig-zag schematic symbol for fixed electrical resistor.
Capacitor (Non-Polarized)
PassiveElectrostatic charge storage element with parallel dielectric plates.
Inductor / Coil
PassiveElectromagnetic coil storing energy in a magnetic field.
Earth Ground (GND)
GroundingPhysical zero potential electrical ground connection.
Diode (Semiconductor)
SemiconductorsOne-way semiconductor check valve allowing current in forward direction.
SPST Switch (Single Pole Single Throw)
SwitchesBasic on/off mechanical circuit interrupter.