Choke (Inductor): Frequency Range 10 kHz to 10 MHz

Component Specifications

Definition

A choke, also known as an inductor, is a passive two-terminal electrical component that resists changes in electric current passing through it. It consists of a conductor, typically wound into a coil, which generates a magnetic field when current flows. In filtering circuits, chokes are specifically designed to block high-frequency alternating current (AC) while allowing direct current (DC) or low-frequency signals to pass, effectively suppressing electromagnetic interference (EMI) and radio frequency interference (RFI). They are critical in power supplies, motor drives, and communication systems for noise reduction and signal integrity.

Working Principle

The working principle is based on Faraday's law of electromagnetic induction. When current flows through the coil, it creates a magnetic field; any change in current induces a voltage (back EMF) that opposes the change (Lenz's law). This property allows chokes to smooth current fluctuations, filter out high-frequency noise, and store energy temporarily in the magnetic field.

Materials

Core: Ferrite, iron powder, or laminated silicon steel; Wire: Copper or aluminum enameled wire; Insulation: Polyurethane, polyester, or epoxy coating; Housing: Plastic or metal casing for protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Inductance	1 μH to 100 mH
DC Resistance	0.01 Ω to 10 Ω
Current Rating	0.1 A to 50 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

Filtering Circuit (Choke & Capacitors)

A passive electronic circuit that smooths the pulsating DC output from a rectifier by reducing AC ripple voltage.

View Product Details

Engineering Analysis

Risks & Mitigation

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

FMEA Triads

Trigger: Overcurrent or high ambient temperature
Failure: Thermal degradation and burnout
Mitigation: Use chokes with adequate current rating and install cooling systems

Trigger: Mechanical stress or poor mounting
Failure: Coil breakage or core damage
Mitigation: Secure mounting with shock absorbers and regular inspections

Trigger: Moisture ingress or contamination
Failure: Insulation failure and short circuit
Mitigation: Apply conformal coating and use sealed enclosures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Inductance tolerance typically ±10% to ±20%

Test Method

Measured using LCR meters per IEC 62024 for inductance and Q-factor, with thermal cycling tests per MIL-STD-202 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

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 Choke (Inductor)

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Zibo Yunqi

Shandong, CN

Also makes: High-Frequency Transformer, Common-Mode Choke, Current Transformer and 4 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Custom PFC Choke & Inductor |”
View source page ↗ steed-components.com · checked 2026-09-11

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Marking Strip

A durable marking strip used for terminal identification in motor terminal blocks to ensure proper electrical connections and safety compliance.

Gland Body

A gland body is the main housing component of an aluminum cable gland that provides mechanical protection and environmental sealing for electrical cables entering enclosures.

Current Sense Resistor

A precision resistor used to measure current flow in electrical circuits by converting current to a measurable voltage drop.

Conductor Terminal

A conductor terminal is a critical electrical component designed to securely connect and terminate conductors in high-voltage insulating bushings, ensuring reliable electrical transmission and insulation integrity.

Frequently Asked Questions

What is the difference between a choke and a regular inductor?

A choke is a type of inductor specifically designed for filtering high-frequency noise in circuits, often with higher inductance and optimized for EMI suppression, whereas general inductors may be used for energy storage, tuning, or other applications.

How do I select a choke for a filtering circuit?

Consider key parameters: inductance value (based on frequency to be filtered), current rating (must exceed circuit current), DC resistance (affects power loss), and core material (ferrite for high frequencies, iron for 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.

Choke (Inductor)