Inductor: labelled reference, US style

Print with your browser's Print command, on A4 or US Letter. The drawings are free to reuse under CC BY 4.0: credit Circuit Symbols (circuitsymbols.com).

Choose another worksheet

Inductor: labelled reference, US style, sheet 1 of 1

  1. Fig. 1

    12

    Inductor

    An inductor stores energy in a magnetic field and opposes changes in current; its symbol represents the coil.

  2. Fig. 2

    12

    Iron-core inductor

    In the coil convention used here, solid parallel core lines indicate iron and dashed core lines ferrite. The unmarked coil is used for air core. These drawings do not identify every material detail.

  3. Fig. 3

    12

    Ferrite-core inductor

    In the coil convention used here, solid parallel core lines indicate iron and dashed core lines ferrite. The unmarked coil is used for air core. These drawings do not identify every material detail.

Terminal key
Fig.TerminalsWhat the terminal is
1–31, 2The plain, uncoupled two-terminal inductor symbol has no fixed polarity mark; either terminal can be used as the voltage reference.

Sources

  1. ModEL — Inductors and Inductive Circuits, §§3.1–3.2 (current change and polarity), Tony R. Kuphaldt, retrieved 2026-09-22
  2. Lessons In Electric Circuits, Vol. V — §9, Circuit Schematic Symbols (pp. 130–139), Tony R. Kuphaldt, retrieved 2026-09-22
  3. ECE 3310, Experiment 9 — inductor core symbols, Figure 2, Wayne State University, retrieved 2026-09-22
Name
Class
Date
Sheet
1 of 1
Drawing
Inductor Labelled reference
Style
US style
From
circuitsymbols.com
Licence
CC BY 4.0