Fe-based Toroidal Nanocrystalline Amorphous Core Cut Core for Current Sensor
Sep 22, 2025
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Fe-based Toroidal Nanocrystalline Amorphous Core Product Description
Nanocrystalline cores feature very high permeability over low frequency to high frequency up to 30Mhz. They are very 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.
Toroidal Nanocrystalline Amorphous Core Specification
| Part No. | Core dimensions | Case dimensions | Effictive cross section |
Mean path length |
AL Nominal Value** | Equivalent to VAC part no. | |||||
| od | id | h | OD | ID | H | AFe | lFe | 10kHz | 100kHz | ||
| mm | mm | mm | mm | mm | mm | cm2 | cm | μH | μH | ||
| KMN986545 | 9.8 | 6.5 | 4.5 | 11.3 | 5 | 6.1 | 0.06 | 2.6 | 25.5 | 6.4 | W914 |
| KMN120805 | 12 | 8 | 4.5 | 14.5 | 6.3 | 6.9 | 0.08 | 3.1 | 28.0 | 6.8 | W902 |
| KMN151005 | 15 | 10 | 4.5 | 17.1 | 8.3 | 7.1 | 0.09 | 3.9 | 27.0 | 6.7 | W865 |
| KMN161006 | 16 | 10 | 6 | 17.9 | 8.1 | 8.1 | 0.14 | 4.1 | 43.0 | 10.1 | W403 |
| KMN161008 | 16 | 10 | 8 | 17.8 | 8.4 | 9.9 | 0.19 | 4.1 | 46.1 | 11.5 | - |
| KMN171206 | 17.5 | 12.6 | 6 | 19.2 | 10.9 | 8.1 | 0.11 | 4.7 | 30.0 | 6.9 | W515 |
| KMN191510 | 19 | 15 | 10 | 21.2 | 13.5 | 12.3 | 0.16 | 5.3 | 36.1 | 8.8 | W838 |
| KMN201208 | 20 | 12 | 8 | 21.7 | 10.8 | 9.9 | 0.25 | 5.0 | 55.2 | 13.6 | W409 |
| KMN201210 | 20 | 12 | 10 | 22.6 | 10.5 | 12.5 | 0.31 | 5.0 | 62.4 | 15.6 | - |
| KMN211308E * | 21.3 | 13.6 | 8 | 22 | 13 | 8.8 | 0.24 | 5.5 | 44.1 | 11.0 | - |
| KMN252010 | 25 | 20 | 10 | 28 | 17.2 | 13.2 | 0.20 | 7.1 | 28.4 | 7.3 | W523 |
| KMN251610 | 25 | 16 | 10 | 28 | 14.0 | 13.1 | 0.35 | 6.4 | 67.0 | 15.5 | W380 |
| KMN261610 | 26 | 16 | 10 | 28.3 | 14 | 12.8 | 0.39 | 6.6 | 57.1 | 14.3 | - |
| KMN302010 | 30 | 20 | 10 | 33.2 | 17.8 | 13.3 | 0.39 | 7.9 | 59.3 | 14.0 | W423 |
| KMN302015 | 30 | 20 | 15 | 33.6 | 17.8 | 17.8 | 0.59 | 7.9 | 88.0 | 20.0 | W414 |
| KMN322010 | 32 | 20 | 10 | 34.4 | 18.1 | 13 | 0.47 | 8.2 | 57.6 | 14.4 | - |
| KMN322015 | 32 | 20 | 15 | 34.6 | 17.9 | 18.2 | 0.70 | 8.2 | 86.4 | 21.6 | - |
| KMN322115Y | 32 | 21 | 15 | 35.5 | 18.5 | 19 | 0.64 | 8.3 | 77.7 | 19.4 | 3-Phase |
| KMN382415 | 37.8 | 24.2 | 15 | 40.8 | 21.6 | 18.3 | 0.80 | 9.7 | 82.1 | 20.5 | - |
| KMN402515 | 40 | 25 | 15 | 43.8 | 21.6 | 18.8 | 0.88 | 10.2 | 99.0 | 23.1 | W424 |
| KMN402520 | 40 | 25 | 20 | 45 | 21.5 | 24.7 | 1.17 | 10.2 | 115.2 | 28.8 | - |
| KMN403215 | 40 | 32 | 15 | 44.9 | 28.8 | 18.8 | 0.47 | 11.3 | 48.0 | 11.3 | W422 |
| KMN453015 | 45 | 30 | 15 | 48.3 | 26.4 | 18.2 | 0.88 | 11.8 | 87.6 | 20.0 | V102 |
| KMN462725 | 46 | 27 | 25 | 48.8 | 24.6 | 27.8 | 1.85 | 11.5 | 162.4 | 40.6 | - |
| KMN503220 | 50 | 32 | 20 | 53.8 | 28.5 | 24 | 1.40 | 12.9 | 109.6 | 27.4 | - |
| KMN504020 | 50 | 40 | 20 | 53.6 | 37.1 | 23 | 0.78 | 14.1 | 45.0 | 13.5 | W565 |
| KMN635025 | 63 | 50 | 25 | 69 | 46 | 29 | 1.27 | 17.7 | 59.0 | 17.5 | W517 |
| KMN644020 | 64 | 40 | 20 | 68.2 | 37 | 23.5 | 1.87 | 16.3 | 115.2 | 28.8 | - |
| KMN644025 | 64 | 40 | 25 | 67.4 | 37 | 29.2 | 2.34 | 16.3 | 144.0 | 36.0 | - |
| KMN805020 | 80 | 50 | 20 | 83.8 | 46.6 | 25.0 | 2.34 | 20.4 | 94.0 | 28.0 | V140 |
| KMN805025 | 80 | 50 | 25 | 84 | 47 | 29 | 2.93 | 20.4 | 144.0 | 36.0 | - |
| KMN906020 | 90 | 60 | 20 | 95.4 | 54.7 | 24.7 | 2.34 | 23.6 | 81.0 | 25.1 | W518 |
| KMN1008020 | 100 | 80 | 20 | 105 | 75 | 25 | 1.56 | 28.3 | 55.5 | 13.9 | - |
| KMN1027625 | 102 | 76 | 25 | 108.1 | 70.0 | 30.3 | 2.54 | 27.9 | 91.1 | 22.8 | W468 |
| KMN1108025 | 110 | 80 | 25 | 116.6 | 73.8 | 31.4 | 2.93 | 29.8 | 98.5 | 24.6 | - |
| KMN1309030 | 130 | 90 | 30 | 135.3 | 84.9 | 36.5 | 4.68 | 34.5 | 136.1 | 34.0 | - |
| KMN14010025 | 140 | 100 | 25 | 145 | 95 | 30 | 3.90 | 37.7 | 104 | 26 | - |
| KMN16013025 | 160 | 130 | 25 | 165 | 125 | 30 | 2.93 | 45.5 | 64.6 | 16.1 | - |
| KMN17012025 | 170 | 120 | 25 | 175 | 115 | 30 | 4.88 | 45.5 | 107.6 | 26.9 | - |
| KMN20016030 | 200 | 160 | 30 | 207 | 153 | 37 | 4.5 | 56.5 | 83.2 | 2.8 | - |
Cores with other specifications can be provided concerning to customer demand.
Nanocrystalline Amorphous Core Feature
- Material: Fe-based Nanocrystalline core
- Saturation flux density induction: 1.25T
- Permeability @ 10KHz: 80000
- Permeability @ 100KHz: 20000
- Curie temperature(℃): 560
- Stacking factor: 0.78
- Saturation magnetostriction(*10^-6): <2
- Resistivity (μΩ.cm): 115
- Ribbon thickness: 25μm
- Core shapes: Troidal core
Fe-based Toroidal Nanocrystalline Amorphous Core Applications
>> EMC Filter
>> 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
>> VFD Inverter Drive Motor Systems
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Manufacturing Process
1. Raw Material Sourcing
2. Slitting
3. Punching
4. Laminating
5. Core Forming
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;
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Annual turnover up to 35 million dollor per year;
Owns many sets of highly automatic winding, annealing, and assembling machines;
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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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CEO
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Strive To Create world-class Iron core brand
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