Nanocrystalline Cores for EMI EMC Filter Common Mode Chokes
Sep 22, 2025
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Nanocrystalline Core Product Description
Nanocrystalline cores feature high permeability over wide frequency. They are suitable for common mode choke to be used as EMC filter to compress conducted common mode noise. Compared to traditional ferrite core, nanocrystalline core has a lot of advantages as high inductance, good filter effective, small size and volume, less turns of copper wire, lower power consumption and high efficiency. Permeability of our nanocrystalline core can reach 20000, we are at the leading position.
Curie temperature of nanocrystalline core is about 560℃, higher than traditional ferrite core about 200℃. High curie temperature make nanocrystalline core good thermal stability, and can continuous working at up to 120℃ environment.
Nanocrystalline cores is a kind of soft magnetic material for common mode choke. Our nanocrystalline cores used 25μm thickness second generation thin ribbons, which have higher permeability at high frequency.
Nanocrystalline Core Feature
- Material: Fe-based Nanocrystalline core
- Saturation flux density induction: 1.25T
- Permeability @ 10KHz: 80000 (Typical value)
- Permeability @ 100KHz: 20000 (Typical value)
- Curie temperature(℃): 560
- Stacking factor: 0.78
- Saturation magnetostriction(*10^-6): <2
- Resistivity (μΩ.cm): 115
- Ribbon thickness: 18~25μm
Nanocrystalline Core Application
>> Switched mode power supply
>> Computer power supply
>> Communication and network power supply
>> Laser and X-ray power supply
>> Welding equipment and Electrical plating power supply
>> Solar energy equipment and Wind power generator
>> Household electrical appliance
>> Uninterruptable power supply (UPS)
>> Frequency converter
>> Inducted heating equipment
>> high-speed railway power supplies
Nanocrystalline Core Parameter
| Core dimensions | Case dimensions | Effictive cross section |
Mean path length |
Weight | AL Typical Value** | |||||
| od | id | h | OD | ID | H | AFe | lFe | mFe | 10kHz | 100kHz |
| mm | mm | mm | mm | mm | mm | cm2 | cm | g | μH | μH |
| 9.8 | 6.5 | 4.5 | 11.3 | 5 | 6.1 | 0.06 | 2.6 | 1.1 | 25.5 | 6.4 |
| 12 | 8 | 5 | 14.4 | 6.5 | 7.0 | 0.08 | 3.1 | 1.6 | 28.0 | 6.8 |
| 16 | 10 | 6 | 17.9 | 8.1 | 8.1 | 0.14 | 4.1 | 4.16 | 43.0 | 10.1 |
| 16 | 10 | 8 | 17.8 | 8.4 | 9.9 | 0.19 | 4.1 | 5.5 | 46.1 | 11.5 |
| 19 | 15 | 10 | 21.2 | 13.5 | 12.3 | 0.16 | 5.3 | 6.0 | 36.1 | 8.8 |
| 20 | 12 | 8 | 21.7 | 10.8 | 9.9 | 0.25 | 5.0 | 9.1 | 55.2 | 13.6 |
| 20 | 12 | 10 | 22.6 | 10.5 | 12.5 | 0.31 | 5.0 | 11.4 | 62.4 | 15.6 |
| 21.3 | 13.6 | 8 | 22 | 13 | 8.8 | 0.24 | 5.5 | 9.5 | 44.1 | 11.0 |
| 25 | 20 | 10 | 28 | 17.2 | 13.2 | 0.20 | 7.1 | 10 | 28.4 | 7.3 |
| 25 | 26 | 10 | 28 | 14.0 | 13.1 | 0.35 | 6.4 | 16.4 | 67.0 | 15.5 |
| 25.5 | 16 | 10 | 28.3 | 13.9 | 13 | 0.39 | 6.6 | 18.6 | 57.1 | 14.3 |
| 30 | 20 | 10 | 33.2 | 17.8 | 13.3 | 0.39 | 7.9 | 22 | 59.3 | 14.0 |
| 30 | 20 | 15 | 33.6 | 17.8 | 17.8 | 0.59 | 7.9 | 33 | 88.0 | 20.0 |
| 32 | 20 | 10 | 34.4 | 18.1 | 13 | 0.47 | 8.2 | 28 | 57.6 | 14.4 |
| 32 | 20 | 15 | 35.5 | 18.5 | 19 | 0.64 | 8.3 | 42 | 86.4 | 21.6 |
| 32 | 21 | 15 | 34.6 | 17.9 | 18.2 | 0.70 | 8.2 | 38.8 | 77.7 | 19.4 |
| 40 | 25 | 15 | 44.4 | 22 | 18.8 | 0.88 | 10.2 | 65 | 99.0 | 23.1 |
| 40 | 25 | 20 | 45 | 21.5 | 24.7 | 1.17 | 10.2 | 86.6 | 115.2 | 28.8 |
| 40 | 32 | 15 | 44.9 | 28.8 | 18.8 | 0.47 | 11.3 | 38 | 48.0 | 11.3 |
| 45 | 30 | 15 | 48.3 | 26.4 | 18.2 | 0.88 | 11.8 | 74.9 | 87.6 | 20.0 |
| 46 | 27 | 25 | 48.8 | 24.6 | 27.8 | 1.85 | 11.5 | 153.9 | 162.4 | 40.6 |
| 50 | 32 | 20 | 53.8 | 28.5 | 24 | 1.40 | 12.9 | 131 | 109.6 | 27.4 |
| 50 | 40 | 20 | 53.6 | 37.1 | 23 | 0.78 | 14.1 | 80 | 45.0 | 13.5 |
| 63 | 50 | 25 | 69 | 46 | 29 | 1.27 | 17.7 | 163 | 59.0 | 17.5 |
| 64 | 40 | 20 | 68.2 | 37 | 23.5 | 1.87 | 16.3 | 222 | 115.2 | 28.8 |
| 64 | 40 | 25 | 67.4 | 37 | 29.3 | 2.34 | 16.3 | 277 | 144.0 | 36.0 |
| 80 | 50 | 20 | 83.8 | 46.6 | 25.0 | 2.34 | 20.4 | 346 | 94.0 | 28.0 |
| 80 | 50 | 25 | 83.5 | 47.2 | 28.8 | 2.93 | 20.4 | 433 | 144.0 | 36.0 |
| 90 | 60 | 20 | 94.3 | 55 | 24.3 | 2.34 | 23.6 | 400 | 81.0 | 25.1 |
| 100 | 80 | 20 | 105 | 75 | 25 | 1.56 | 28.3 | 320 | 55.5 | 13.9 |
| 102 | 76 | 25 | 108.1 | 70 | 30.3 | 2.54 | 27.9 | 514 | 91.1 | 22.8 |
| 110 | 80 | 25 | 116.6 | 73.8 | 31.4 | 2.93 | 29.8 | 633 | 98.5 | 24.6 |
| 130 | 90 | 30 | 135 | 85 | 35 | 4.68 | 34.5 | 1172 | 136.1 | 34.0 |
| 140 | 100 | 25 | 145 | 95 | 30 | 3.90 | 37.7 | 1065 | 91.0 | 26.0 |
| 160 | 130 | 25 | 165 | 125 | 30 | 2.93 | 45.5 | 966 | 56.5 | 16.1 |
| 170 | 120 | 25 | 175 | 115 | 30 | 4.88 | 45.5 | 1609 | 94.1 | 26.9 |
| 200 | 160 | 30 | 207 | 153 | 37 | 4.50 | 56.5 | 1918 | 72.8 | 20.8 |
These cores are our standard products, we can also design and produce high performance cores according to customer's requirements, including sizes, inductance and applications. We can help customers to select the best performance cores.
* Epoxy coated.
** AL value tolerance: +50%/-30%
KMN322115Y: Three phase
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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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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.
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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;
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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