INDUSTRY COMPONENT

Inductor

An inductor is a passive electrical component that stores energy in a magnetic field when electric current flows through it, used for filtering, energy storage, and signal processing in driver circuits.

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Component Specifications

Definition
An inductor is a fundamental passive electronic component consisting of a coil of conductive wire wound around a core material (which may be air, ferrite, or other magnetic materials). It operates based on electromagnetic induction principles, opposing changes in current flow through self-inductance. In driver circuits, inductors serve critical functions including energy storage in switching regulators, filtering of high-frequency noise, impedance matching, and forming resonant circuits with capacitors. The inductance value (measured in henries) determines its energy storage capacity and frequency response characteristics.
Working Principle
Inductors operate on Faraday's law of electromagnetic induction. When current flows through the coiled conductor, it generates a magnetic field around it. Any change in current induces a voltage (electromotive force) that opposes the change in current (Lenz's law). This property allows inductors to store energy in their magnetic fields and release it back to the circuit, smooth current variations, and block high-frequency AC signals while allowing DC and low-frequency signals to pass.
Materials
Copper or aluminum wire for winding; Core materials: air (for high-frequency applications), ferrite (for power applications), powdered iron, laminated silicon steel, or nanocrystalline materials; Insulation: enamel coating on wire, epoxy encapsulation; Terminal materials: tin-plated copper or brass.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Q Factor10 to 100 at specified frequency
Tolerance±5% to ±20%
Inductance1μH to 100mH
DC Resistance0.01Ω to 10Ω
Current Rating100mA to 20A
Saturation CurrentSpecified by manufacturer
Operating Temperature-40°C to +125°C
Self Resonant Frequency1MHz to 100MHz

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
IEC 62024, IEC 62391, MIL-PRF-27, AEC-Q200

Parent Products

This component is used in the following industrial products

Driver Circuit

Electronic circuit that regulates power and controls current to LEDs in an illumination array.

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Filter Network

A circuit component within a signal conditioning system that selectively passes or blocks specific frequency ranges to remove noise and unwanted signals.

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Impedance Matching Network

A circuit network designed to maximize power transfer or minimize signal reflection by matching the impedance between a source and a load.

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Engineering Analysis

Risks & Mitigation
  • Magnetic saturation leading to circuit failure
  • Overheating due to excessive current
  • Mechanical vibration causing audible noise
  • Electromagnetic interference with nearby components
  • Insulation breakdown at high voltages
FMEA Triads
Trigger: Exceeding rated current
Failure: Core saturation and overheating
Mitigation: Select inductors with appropriate current ratings, implement current limiting circuits, and monitor temperature
Trigger: Mechanical stress or vibration
Failure: Wire breakage or core damage
Mitigation: Use vibration-resistant mounting, conformal coating, and select mechanically robust inductor designs
Trigger: High-frequency operation beyond self-resonant frequency
Failure: Loss of inductive properties and circuit instability
Mitigation: Select inductors with appropriate SRF for application frequency, use multiple inductors in series for high-frequency applications

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Inductance tolerance typically ±10% to ±20% for power applications, ±5% for precision circuits
Test Method
LCR meter measurement at specified frequency and voltage, temperature cycling tests, current saturation tests, insulation resistance tests

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Inductor

Manufacturer profiles associated with Inductor.

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Frequently Asked Questions

What is the main function of an inductor in a driver circuit?

In driver circuits, inductors primarily store energy during switching cycles (in switching regulators), filter high-frequency noise from power supplies, and smooth current flow to protect sensitive components.

How do I select the right inductor for my application?

Consider these key parameters: required inductance value, current rating (both RMS and saturation current), DC resistance (affects efficiency), operating frequency, physical size constraints, and temperature stability requirements for your specific circuit.

What causes inductor saturation and why is it problematic?

Saturation occurs when the magnetic core material can no longer support increased magnetic flux density. This causes a sharp drop in inductance, leading to excessive current draw, overheating, and potential circuit failure in power applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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