Inductors are electronic components used to store energy in electronic circuits. Inductors create a magnetic field on a coil through which electric current flows, and this magnetic field stores energy. Inductors are used to prevent the change of electric current in the circuit and are therefore often used in power supplies and filters.

Inductors are available in a variety of sizes and shapes and are made from a variety of materials, particularly copper and aluminium. Inductors, like resistors, are rated by their inductance value and measured in henry (H). The inductance value indicates how the inductor affects a current, and there are various inductance values suitable for different applications.

Inductors, like other electronic components, can be sensitive to environmental conditions and should therefore be handled with care.