Customized Toroid Transformer Ferrite Magnet Core

Toroid Transformer Ferrite Magnet Core Product Description

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Ferrite Core feature

As a soft magnetic material of oxide ceramic type, ferrite has unique properties determined by its composition and structure, which distinguish it from metal alloy magnetic cores (such as amorphous alloys, silicon steel):

 

Low High-Frequency Loss:

Ferrite has a much higher resistivity than metal alloys (about 10⁶~10¹⁰ Ω·cm), resulting in extremely low eddy current loss. In ultra-high-frequency scenarios above 1MHz, its loss is much lower than that of amorphous alloy magnetic cores, meeting the energy efficiency requirements of high-frequency transformers.

 

Low Saturation Magnetic Flux Density:

Its saturation magnetic flux density is usually only 0.3T~0.5T, far lower than that of amorphous alloys (1.5T~1.8T). Therefore, it is not suitable for high-current, high-power scenarios, and is more suitable for small and medium-power (generally <5kW) equipment.

 

Cost and Process Advantages:

Raw materials are mainly iron oxide and metal oxides, with a cost only 1/3~1/5 of that of amorphous alloys. The forming process (such as sintering) is mature, enabling mass production of toroidal magnetic cores of different specifications with high cost-effectiveness.

 

Toroidal Ferrite Core Main Material Types and Applicable 

The application scenarios of toroidal ferrite magnetic cores are mainly determined by their specific material types. Common classifications and applicable scenarios are as follows:

 

• Mn-Zn Ferrite Toroidal Magnetic Core: It has high magnetic permeability (1000~10000 μH/m) and low medium-to-high frequency loss, suitable for medium-to-high frequency (10kHz~1MHz), low-power scenarios, such as mobile phone fast-charging transformers and small switching power supply transformers.

 

• Ni-Zn Ferrite Toroidal Magnetic Core: It has higher resistivity and lower high-frequency loss, suitable for ultra-high frequency scenarios (1MHz~100MHz), such as RF transformers and signal coupling transformers in communication equipment. At the same time, it has stronger anti-interference capability, adapting to scenarios with complex electromagnetic environments.

 

ring core specification

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