Ferrite Core for Inductor

Oct 23, 2025

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Ferrite cores provide strong magnetic performance without introducing excessive energy loss, even at high switching frequencies. Their ceramic-like composition naturally resists eddy current formation, making them exceptionally stable for compact and high-frequency devices.

 

Ferrite materials feature high magnetic permeability with extremely low electrical conductivity. This means they can guide magnetic flux efficiently while preventing large circulating currents inside the core. This property alone significantly reduces core heating in high-frequency circuits.

 

When comparing ferrite core vs iron core designs, ferrites exhibit far lower eddy current losses and better EMI suppression at higher frequencies. This makes them particularly effective in power electronics, where switching transients and harmonics are common.

 

Ferrite Core for Inductor

 

 

What are the Benefits of Ferrite Core?

 

High Efficiency at High Frequencies

With low core loss characteristics, ferrite inductors maintain efficiency even at switching frequencies well into the hundreds of kilohertz or beyond. They're a mainstay in SMPS (switch-mode power supply) designs, RF circuits, and high-speed digital electronics.

 

Compact Design

Because ferrite cores operate effectively at higher frequencies, fewer turns of wire are needed to achieve the same inductance compared to lower-frequency designs. This supports miniaturization without compromising electrical performance.

 

Excellent EMI Suppression

Ferrite's magnetic properties naturally attenuate high-frequency noise. This is especially useful in sensitive communication equipment where clean signal paths are vital.

 

Broad Application Range

From ferrite core inductor applications in EV charging systems to medical imaging equipment, the flexibility of this core type allows for both standard and highly specialized configurations.

 

 

Ferrite Core vs. Iron Core

 

Ferrite Core Inductor vs. Iron Core Inductor

 

Ferrite and iron cores both serve important roles, but their performance characteristics differ significantly.

 

Introduction to Comparison

Knowing when to select ferrite over iron requires understanding the electrical and mechanical demands of your design.

 

Ferrite Core Advantages

• Superior performance in high-frequency ranges.

• Minimal eddy current loss due to low conductivity.

• Lightweight and resistant to corrosion.

 

Iron Core Advantages

• Handles higher currents more effectively at low frequencies.

• Higher saturation flux density, making them suitable for large power transformers in 50–60 Hz systems.

 

When to Choose Ferrite

If your project involves compact, high-frequency switching circuits and requires effective EMI suppression, ferrite is typically the better choice. For industrial motors or mains-frequency transformers, iron cores may be more practical.

 
 

Ferrite Core specification

Ferrite Core for Inductor

Magnetic core size(mm) Protective box size(mm) Effective cross-sectional area Ae(mm2) Magnetic path length Ie(mm) Maximum DC
overcurrent class
(A)
id od ht ID OD HT
14 19 6.5 12 22 8 11.86 51.81 20
14 20 10 12 22.3 11.4 29.68 52.29 40
16 21 10 15 24 12.3 24.85 57.41 60
16 23 8 15 24 9.7 20.44 61.23 60
16 23 10 15 24 12.3 34.62 59.92 60
17 22 10 15.3 24.4 12.3 24.86 60.59 60
17 21 8 15.3 24 9.7 25.56 60.67 60
17 23 8 15.3 24.4 9.7 26.89 61.34 60
18 23 10 16.4 24.4 12.3 29.78 60.38 70
18 24 9 16.4 25 11.2 34.78 60.89 70
18 25 10 16.4 25.9 12.3 37.97 64.56 70
19 24 9 17.3 25 11.2 40.39 65.32 80
19 25 10 17.3 26 12.3 39.42 62.31 80
19 26 10 17.3 27.3 12.3 48.32 69.56 80
20 25 10 18.5 26.3 12.3 39.29 70.32 90
20 28 10 18.5 29 12.3 45.76 73.88 90
20 32 10 18.5 32.3 12.3 58.91 78.75 90
21 29 10 18.2 31.3 12.3 39.65 77.19 100
21 26 8 18.3 27.4 9.7 46.54 78.32 100
21 28 10 18.3 30 12.3 50.39 77.45 100
22 28 10 20.5 30 12.3 49.32 79.89 120
22 32 10 20.5 33.4 12.3 43.58 73.43 120
23 32 10 21.3 33.4 12.3 44.56 74.56 120

 

 

GNEE Featured Products

Gnee provides premium iron cores to the world. Our cores can be selected in a wide range of materials, shapes, applications, manufacturing techniques, etc., to meet customers' diverse demands. Explore our wide product range now~

Manufacturing Process

 

Raw Material Sourcing

1. Raw Material Sourcing

Slitting

2. Slitting

Punching

3. Punching

Laminating

4. Laminating

Core Forming

5. Core Forming

testing

6. testing

GNEE EC

Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
The company currently occupies over 20,000 square meters and employs more than 200 people, including over 80 professionals. After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.

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Why Choose GNEE EC?

 

GNEE EC was founded in 2008, which is a National High-tech Enterprise & Famous Brand Enterprise in China, developing into a professional manufacturer and supplier of high-quality iron cores.

 

18+

Over 18 years of success in the iron core industry;
National High-tech Enterprise & Famous Brand Enterprises in China;

 
 

200+

Over 200 employees;
The R&D team has more than 80 experienced engineers and the production team has more than 100 skilled staffs;

 
 

35+

Annual turnover up to 35 million dollor per year;
Owns many sets of highly automatic winding, annealing, and assembling machines;

 
 

1,000+

Over 1000 customers in domestic and overseas markets;
core Products are exported to more than 70 countries in the world;

 

Gnee Iron Core Factory Overview

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"The Core of the Iron Core, the Power of Leadership" - See Our Great Decision-Makers Deeply Engaged in the Magnetic Materials Industry.

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CEO

General Manager

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Industries Served

 
Automobile Industry

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With 18 Years of industry experience, we focus on the research, development, and manufacturing of high-quality iron cores for electricity, industrial control, new energy, and automotive markets

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