Inductor (for LC filters): Frequency Range 10 kHz to 10 MHz

Component Specifications

Definition

An inductor is a passive electronic component designed for LC (inductor-capacitor) filters, primarily used in low-pass filter configurations to attenuate high-frequency signals while allowing low-frequency signals to pass. It operates by storing energy in a magnetic field when current flows through it, creating impedance that increases with frequency. In industrial applications, it is critical for reducing electromagnetic interference (EMI), smoothing power supplies, and ensuring signal integrity in machinery and electronic systems.

Working Principle

The inductor works based on Faraday's law of electromagnetic induction. When alternating current (AC) flows through its coil, it generates a magnetic field that opposes changes in current, creating inductive reactance (XL = 2πfL). In an LC filter, the inductor combines with a capacitor to form a resonant circuit that blocks or passes specific frequency bands. For low-pass filters, the inductor's high impedance at high frequencies attenuates noise, while low frequencies pass through with minimal loss.

Materials

Core: Ferrite, powdered iron, or air core for high-frequency applications; Wire: Copper or aluminum enameled wire; Insulation: Polyurethane, polyester, or epoxy coating; Housing: Plastic or metal casing for protection and heat dissipation.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Tolerance	±5% to ±20%
Inductance	1 μH to 100 mH
DC Resistance	0.01 Ω to 10 Ω
Current Rating	0.1 A to 10 A
Frequency Range	10 kHz to 10 MHz
Temperature Range	-40°C to +125°C

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

Standards

ISO 9001, IEC 60076, DIN EN 61558

Parent Products

This component is used in the following industrial products

Low-Pass Filter

An electronic filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency.

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Engineering Analysis

Risks & Mitigation

Overheating due to excessive current
Core saturation leading to loss of inductance
Mechanical damage from vibration or shock
Insulation failure causing short circuits

FMEA Triads

Trigger: Exceeding current rating
Failure: Overheating and thermal degradation
Mitigation: Use inductors with adequate current margin and implement thermal management

Trigger: High-frequency operation beyond specified range
Failure: Core losses and reduced efficiency
Mitigation: Select core materials optimized for the operating frequency and monitor performance

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Inductance tolerance typically ±10% as per IEC standards, with tighter tolerances available for precision applications

Test Method

Testing per IEC 60076 for electrical parameters, including inductance measurement using LCR meters and thermal cycling tests for reliability.

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

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Manufacturers of Inductor (for LC filters)

Manufacturer profiles associated with Inductor (for LC filters).

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Frequently Asked Questions

What is the role of an inductor in a low-pass filter?

In a low-pass filter, the inductor blocks high-frequency noise by providing high impedance at those frequencies, while allowing low-frequency signals to pass through with minimal attenuation, ensuring clean power or signal output.

How do I select an inductor for an LC filter?

Select based on required inductance value, current rating, frequency range, and core material. Consider factors like saturation current, temperature stability, and physical size to match the filter's application and environmental conditions.

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.

Inductor (for LC filters)