Nanocrystalline Core For Common Mode Chokes

Sep 22, 2025

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nanocrystalline 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.

Curie temperature of nanocrystalline core is about 560℃, much higher than traditional ferrite core about 200℃. High curie temperature make nanocrystalline core excellent thermal stability, and can continuous working at up to 120℃ environment.

Nanocrystalline cores is the best choice soft magnetic material for common mode choke. Our nanocrystalline cores used 25μm thickness second generation thin ribbons, which have much higher permeability at high frequency.

Nanocrystalline Core For Common Mode Chokes

Nanocrystalline Core Parameters

Core dimensions			Case dimensions			Effictive cross section	Mean path length	Weight	AL Minimum 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	14.2	3.0
12	8	5	14.4	6.5	7.0	0.07	3.1	1.6	15.6	3.7
16	10	8	17.8	8.4	9.9	0.19	4.1	5.5	34.6	6.9
19	15	10	21.2	13.5	12.3	0.16	5.3	6.0	22.0	4.4
20	12	8	21.7	10.8	9.9	0.25	5.0	9.1	37.4	7.5
21.3	13.6	8	22	13	8.8	0.24	5.5	9.5	33.0	6.6
25	20	10	28	17.2	13.2	0.20	7.1	10	20.8	4.2
25.5	16	10	28.3	13.9	13	0.39	6.6	19	44.6	8.9
30	20	10	33.2	17.8	13.3	0.39	7.9	22	37.4	7.5
30	20	15	33.6	17.8	17.8	0.59	7.9	33	56.2	11.2
32	20	10	34.4	18.1	13	0.47	8.2	28	43.2	8.6
32	20	15	34.6	17.9	18.2	0.70	8.2	42	64.8	13.0
40	25	15	44.4	22	18.8	0.88	10.2	65	64.8	13.0
40	32	15	44.9	28.8	18.8	0.47	11.3	38	31.2	6.2
50	32	20	53.8	28.5	24	1.40	12.9	131	68.5	16.4
50	40	20	53.6	37.1	23	0.78	14.1	80	34.7	8.3
64	40	25	67.4	37	29.3	2.34	16.3	277	90.0	21.6
80	50	25	83.5	47.2	28.8	2.93	20.4	433	90.0	21.6
100	80	20	105	75	25	1.56	28.3	320	34.7	8.3
102	76	25	107	71	30	2.54	27.9	514	57.0	13.7
130	90	30	135	85	35	4.68	34.5	1172	85.1	20.4
160	130	25	165	125	30	2.93	45.5	966	40.3	9.7
170	120	25	175	115	30	4.88	45.5	1609	67.2	16.1

Cores with other specifications can be provided concerning to customer demand.

Nanocrystalline Core For Common Mode Chokes Feature

Material: Fe-based Nanocrystalline core
Saturation flux density induction: 1.25T
Permeability @ 10KHz: > 50000
Permeability @ 100KHz: >10500
Curie temperature(℃): 560
Stacking factor: 0.78
Saturation magnetostriction(*10^-6): <2
Resistivity (μΩ.cm): 115
Ribbon thickness: 25μm
Core shapes: Toroidal core

Nanocrystalline Core For Common Mode Chokes 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

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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

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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;

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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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