Fixed Inductors are passive electronic components designed to store energy in a magnetic field when electric current flows through them. Unlike variable inductors, their inductance value is preset and remains constant during operation, ensuring stable and predictable circuit performance.
They are widely used in electronic circuits for filtering, energy storage, noise suppression, impedance matching, and voltage regulation. Fixed inductors help smooth current fluctuations, block high-frequency signals, and improve overall signal integrity.
Typically constructed using a copper wire coil wound around a core (air, ferrite, iron, or powdered iron), fixed inductors are available in various shapes and mounting types, including axial, radial, surface-mount (SMD), and through-hole designs. Their performance is defined by parameters such as inductance value (µH/mH/H), current rating, DC resistance (DCR), tolerance, and operating temperature range.