Inductor symbol
Also called Coil, Choke, Reactor
An inductor stores energy in a magnetic field. It opposes changes in current.
ANSI / IEEE
IEC 60617 · S00583
What the inductor symbol means
An inductor stores energy in a magnetic field. It opposes changes in current.
ANSI and IEC symbols
Where you see it
Filters, chokes, switching power supplies and current limiting reactors.
What is written next to it
On a schematic, the inductor usually carries its designator and inductance, such as L1 4.7 mH, and the current rating.
Related symbols
Frequently asked questions
What does the inductor symbol look like?
On ANSI drawings: A row of loops or half circles. In IEC 60617: A row of half circles. An older IEC form was a filled rectangle.
Is the inductor symbol the same in IEC and ANSI?
Yes, it is drawn the same way in most legends.
Where is a inductor used?
Filters, chokes, switching power supplies and current limiting reactors.
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