Amorphous Toroidal Gap Core
Sep 30, 2025
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Amorphous Toroidal Gap Core Product Description
An amorphous toroidal gap core is a ring-shaped component made from an amorphous (non-crystalline) metal alloy, designed with a small gap to prevent magnetic saturation under high direct current (DC) bias.
Its key features include high magnetic permeability, low core losses from hysteresis and eddy currents, and a high saturation flux density. This combination of properties makes them ideal for energy-efficient applications like power factor correction (PFC) inductors, EMI filtering, and telecommunications transformers.
Amorphous ring Gap Core Feature:
*High saturation induction, minimizing core volume
*With adjustable gap size and permeability , permeability range u=50-300
*Gapped cores, for excellent DC –bias characteristics
Amorphous Toroidal Gap Core Application:
*Output smooth filter choke for switched mode power supply
*AC inverter choke. For PV inverters, APF
Performance:
|
Saturation Flux Density Bs |
1.56T |
Hardness Hv |
960 kg/mm2 |
|
Curie temperature Tc |
410℃ |
Resistivity r |
130 μΩ.cm |
|
Crystallization temperature Tx |
500℃ |
Density |
7.18g/cm3 |
|
Magnetostriction lS |
27×10-6 |
Amorphous Toroidal Gap Core specifications
|
Core size |
Finished size |
cross section |
magnetic path length |
effective permeability |
AL(uH)Typ. |
||
|
od x id x h |
OD x ID x H |
Ae(cm2) |
Le(cm) |
u |
10KHz/0.3v |
||
|
22 x 13 x 10 |
24.6 |
10.4 |
13 |
0.39 |
5.5 |
100 |
0.090 |
|
25 x 15 x 15 |
27.6 |
13.3 |
17.2 |
0.65 |
6.28 |
100 |
0.130 |
|
26 x 16 x 10 |
28.2 |
13.9 |
12.7 |
0.43 |
6.59 |
100 |
0.090 |
|
32 x 20 x 15 |
34.5 |
17.8 |
17.8 |
0.77 |
8.16 |
100 |
0.120 |
|
40 x 25 x 15 |
44 |
21.5 |
19 |
0.97 |
10.21 |
100 |
0.120 |
|
40 x 25 x 20 |
45 |
21.5 |
24.7 |
1.29 |
10.21 |
100 |
0.160 |
|
46 x 27 x 15 |
48.5 |
24.4 |
19 |
1.23 |
11.46 |
100 |
0.135 |
|
46 x 27 x 20 |
48.5 |
24.4 |
22.3 |
1.63 |
11.46 |
100 |
0.180 |
|
46 x 27 x 25 |
48.5 |
24 |
28 |
2.04 |
11.46 |
100 |
0.225 |
|
50 x 32 x 20 |
53.5 |
28 |
23.5 |
1.55 |
12.87 |
100 |
0.150 |
|
60 x 35 x 25 |
66.4 |
30 |
29.2 |
2.69 |
14.92 |
100 |
0.226 |
|
64 x 40 x 20 |
68 |
36.5 |
23.5 |
2.06 |
16.32 |
100 |
0.160 |
|
70 x 40 x 25 |
72.5 |
37 |
29 |
3.23 |
17.27 |
100 |
0.235 |
|
80 x 50 x 25 |
84 |
47 |
29 |
3.23 |
20.41 |
100 |
0.200 |
|
76 x 48 x 40 |
80 |
43.5 |
46 |
4.82 |
19.15 |
100 |
0.320 |
|
100 x 60 x 40 |
105 |
55.4 |
46 |
6.88 |
25.12 |
100 |
0.345 |
Cores with other specifications can be provided concerning to customer demand.
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Manufacturing Process
1. Raw Material Sourcing
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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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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;
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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