Neodymium Magnets

Q: Are neodymium magnets the strongest magnets?

Neodymium magnets are among the strongest commercially available permanent magnets, especially for compact applications that need high magnetic force.

Q: What grade of neodymium magnet should I choose?

The right grade depends on size, pull force, working temperature, air gap, coating, magnetization direction, and cost. A higher grade is not always the best choice for every application.

Q: Do neodymium magnets need coating?

Yes. Most neodymium magnets need coating because the material is brittle and vulnerable to corrosion. Common coating options include NiCuNi, zinc, epoxy, parylene, and gold.

Q: Are neodymium magnets suitable for high-temperature use?

Standard neodymium magnet grades have temperature limits. For high-temperature applications, the correct temperature grade should be confirmed instead of only choosing a higher magnetic grade.

Standard and custom NdFeB magnets for OEM, industrial, medical, automation, motor, sensor, and magnetic assembly applications.

✓ High Performance

✓ Reliable Quality

✓ Custom Solutions

Standard & Custom Shapes

Wide range of shapes and sizes

Grades from N35 to N55

Multiple grade options available

Multiple Coating Options

NiCuNi, Zinc, Epoxy, Parylene and more

Sample to Volume Production

Flexible from prototype to bulk orders

NdFeB Magnet Guide

What Are Neodymium Magnets?

Neodymium magnets, also known as NdFeB magnets, NIB magnets, or neo magnets, are rare earth permanent magnets made from neodymium, iron, and boron. They are widely used when compact size, strong magnetic force, and stable magnetic performance are required.

For industrial buyers, the key is not only magnetic strength. Grade, coating, size tolerance, working temperature, and magnetization direction all affect the final performance in real applications.

Key Magnetic Properties You Should Compare

When selecting neodymium magnets, grade alone is not enough. The most important values are maximum energy product (BHmax), remanence (Br), coercivity (HcJ), pull force, working temperature, and surface field strength. BHmax shows how much magnetic energy the material can store. Br indicates the magnetic field remaining after magnetization. HcJ shows how well the magnet resists demagnetization from heat or reverse fields.

Pull force depends on magnet size, grade, coating thickness, contact surface, steel plate thickness, air gap, and testing method. A higher grade does not always create better real-world performance if the magnet works in high temperature, limited space, corrosion risk, or an assembly with air gaps. For applications above 80°C, high-coercivity grades such as M, H, SH, UH, EH, or AH series should be reviewed before sampling.

Neodymium magnets in block, ring, and cylinder shapes

Neodymium Magnet Selection Compare grade, coating, tolerance, temperature, and magnetization direction before sampling.

Common Shapes of Neodymium Magnets

Disc Magnets

For sensors, holding fixtures, electronics, and compact designs.

Ring Magnets

For speakers, motors, magnetic couplings, and center-hole designs.

Countersunk Magnets

For secure screw mounting in fixtures, brackets, equipment panels, and assemblies.

Block Magnets

For industrial holding, motor assemblies, fixtures, and equipment.

Bar Magnets

For magnetic separation, testing, positioning, and linear holding.

Arc Segment Magnets

For motors, rotors, generators, and curved magnetic structures.

Tube Magnets

For magnetic rods, filter systems, sensors, and assembly designs.

Custom Magnets

For drawings, special shapes, tight tolerances, and OEM projects.

Main Neodymium Magnet Grade

	Remanence (Br)				Intrinic Coercivity (HcJ)		Coercivity (Hcb)		Max Energy Product (BH) Max				Density	Relative Recoil Permeability	Temperature Coefficient		Max. Working Temp.
	T		kGs		kA/m	kOe	kA/m	kOe	Kj/m		MGOe		g/cm	Relative Recoil Permeability			°C (L/D=0.7)
	Max	Min	Max	Min	Min	Min	Min	Min	Max	Min	Max	Min	Min		%/°C	%/°C
N56	1.51	1.5	15.1	14.7	876	11	836	10.5	454	414	57	52	7.5	1.05	-0.12	-0.76	80°C
N54	1.49	1.5	14.9	14.5	955	12	836	10.5	437	406	55	51	7.5	1.05	-0.12	-0.76	80°C
N52	1.46	1.4	14.6	14.2	955	12	836	10.5	422	390	53	49	7.5	1.05	-0.12	-0.76	80°C
N50	1.44	1.4	14.4	13.9	955	12	860	10.8	406	374	51	47	7.5	1.05	-0.12	-0.76	80°C
N48	1.43	1.4	14.3	13.7	955	12	860	10.8	390	358	49	45	7.5	1.05	-0.12	-0.76	80°C
N45	1.37	1.3	13.7	13.2	955	12	860	10.8	366	342	46	43	7.5	1.05	-0.12	-0.76	80°C
N42	1.32	1.3	13.2	12.8	955	12	860	10.8	342	318	43	40	7.5	1.05	-0.12	-0.76	80°C
56M	1.5	1.5	15	14.6	1,114	14	995	12.5	446	406	56	51	7.5	1.05	-0.12	-0.68	100°C
54M	1.49	1.4	14.9	14.4	1,114	14	1,035	13	438	398	55	50	7.5	1.05	-0.12	-0.68	100°C
52M	1.46	1.4	14.6	14.2	1,114	14	1,035	13	422	382	53	48	7.5	1.05	-0.12	-0.68	100°C
50M	1.44	1.4	14.4	13.9	1,114	14	1,035	13	406	374	51	47	7.5	1.05	-0.12	-0.68	100°C
48M	1.42	1.4	14.2	13.7	1,114	14	1,027	12.9	390	358	49	45	7.5	1.05	-0.12	-0.68	100°C
45M	1.37	1.3	13.7	13.2	1,114	14	995	12.5	366	342	46	43	7.5	1.05	-0.12	-0.68	100°C
42M	1.32	1.3	13.2	12.8	1,114	14	955	12	342	318	43	40	7.5	1.05	-0.12	-0.68	100°C
40M	1.28	1.3	12.8	12.5	1,114	14	923	11.6	326	302	41	38	7.5	1.05	-0.12	-0.68	100°C
54H	1.49	1.44	14.9	14.4	1,353	17	1,075	13.5	438	398	55	50	7.5	1.05	-0.12	-0.66	120°C
52H	1.46	1.42	14.6	14.2	1,353	17	1,059	13.3	422	382	53	48	7.5	1.05	-0.12	-0.66	120°C
50H	1.44	1.39	14.4	13.9	1,353	17	1,043	13.1	406	374	51	47	7.5	1.05	-0.12	-0.66	120°C
48H	1.42	1.36	14.2	13.6	1,353	17	1,027	12.9	390	358	49	45	7.5	1.05	-0.12	-0.66	120°C
45H	1.37	1.32	13.7	13.2	1,353	17	995	12.5	366	342	46	43	7.5	1.05	-0.12	-0.66	120°C
42H	1.32	1.28	13.2	12.8	1,353	17	955	12	342	318	43	40	7.5	1.05	-0.12	-0.66	120°C
40H	1.28	1.25	12.8	12.5	1,353	17	923	11.6	326	302	41	38	7.5	1.05	-0.12	-0.66	120°C
38H	1.25	1.22	12.5	12.3	1,353	17	899	11.3	310	287	39	36	7.5	1.05	-0.12	-0.66	120°C
35H	1.22	1.17	12.2	11.7	1,353	17	868	10.9	287	263	36	33	7.5	1.05	-0.12	-0.66	120°C
54SH	1.49	1.44	14.9	14.4	1,592	20	1,075	13.5	438	398	55	50	7.5	1.04	-0.115	-0.56	150°C
52SH	1.46	1.42	14.6	14.2	1,592	20	1,059	13.3	422	390	53	49	7.5	1.04	-0.115	-0.56	150°C
50SH	1.42	1.39	14.2	13.9	1,592	20	1,043	13.1	406	374	51	47	7.5	1.04	-0.115	-0.56	150°C
48SH	1.4	1.36	14	13.6	1,592	20	1,035	13	390	358	49	45	7.5	1.04	-0.115	-0.56	150°C
45SH	1.37	1.32	13.7	13.2	1,592	20	995	12.5	366	342	46	43	7.5	1.04	-0.115	-0.56	150°C
42SH	1.32	1.28	13.2	12.8	1,592	20	955	12	342	318	43	40	7.5	1.04	-0.115	-0.56	150°C
40SH	1.28	1.25	12.8	12.5	1,592	20	939	11.8	326	302	41	38	7.5	1.04	-0.115	-0.56	150°C
38SH	1.25	1.22	12.5	12.2	1,592	20	907	11.4	310	287	39	36	7.5	1.04	-0.115	-0.56	150°C
35SH	1.22	1.17	12.2	11.7	1,592	20	876	11	287	263	36	33	7.5	1.04	-0.115	-0.56	150°C
33SH	1.17	1.13	11.7	11.3	1,592	20	844	10.6	271	247	34	31	7.5	1.04	-0.115	-0.56	150°C
52UH	1.46	1.42	14.6	14.2	1,990	25	1,059	13.3	422	390	53	49	7.55	1.03	-0.11	-0.5	180°C
50UH	1.42	1.39	14.2	13.9	1,990	25	1,043	13.1	406	374	51	47	7.55	1.03	-0.11	-0.5	180°C
48UH	1.4	1.36	14	13.6	1,990	25	1,031	12.9	390	358	49	45	7.55	1.03	-0.11	-0.5	180°C
45UH	1.36	1.32	13.6	13.2	1,990	25	1,003	12.6	366	342	46	43	7.55	1.03	-0.11	-0.5	180°C
42UH	1.32	1.28	13.2	12.8	1,990	25	971	12.2	342	318	43	40	7.55	1.03	-0.11	-0.5	180°C
40UH	1.28	1.25	12.8	12.5	1,990	25	923	11.6	326	302	41	38	7.55	1.03	-0.11	-0.5	180°C
38UH	1.25	1.22	12.5	12.2	1,990	25	907	11.4	310	287	39	36	7.55	1.03	-0.11	-0.5	180°C
35UH	1.22	1.17	12.2	11.7	1,990	25	860	10.8	287	263	36	33	7.55	1.03	-0.11	-0.5	180°C
33UH	1.17	1.13	11.7	11.3	1,990	25	852	10.7	271	247	34	31	7.55	1.03	-0.11	-0.5	180°C
30UH	1.13	1.08	11.3	10.8	1,990	25	812	10.2	247	223	31	28	7.55	1.03	-0.11	-0.5	180°C
50EH	1.42	1.39	14.2	13.9	2,308	29	1,043	13.1	406	374	51	47	7.6	1.03	-0.1	-0.45	200°C
48EH	1.36	1.4	13.5	14	2,308	29	1,031	12.9	390	358	49	45	7.6	1.03	-0.1	-0.45	200°C
45EH	1.36	1.32	13.6	13.2	2,388	30	1,003	12.6	366	342	46	43	7.6	1.03	-0.1	-0.45	200°C
42EH	1.32	1.28	13.2	12.8	2,388	30	970	12.2	342	318	43	40	7.6	1.03	-0.1	-0.45	200°C
40EH	1.28	1.25	12.8	12.5	2,388	30	947	11.9	326	302	41	38	7.6	1.03	-0.1	-0.45	200°C
38EH	1.25	1.22	12.5	12.2	2,388	30	915	11.5	310	287	39	36	7.6	1.03	-0.1	-0.45	200°C
35EH	1.22	1.17	12.2	11.7	2,388	30	884	11.1	287	263	36	33	7.6	1.03	-0.1	-0.45	200°C
33EH	1.17	1.13	11.7	11.3	2,388	30	860	10.8	271	247	34	31	7.6	1.03	-0.1	-0.45	200°C
30EH	1.13	1.08	11.3	10.8	2,388	30	820	10.3	247	223	31	28	7.6	1.03	-0.1	-0.45	200°C
45AH	1.36	1.32	13.6	13.2	2,640	33	1,003	12.6	366	342	46	43	7.6	1.03	-0.1	-0.45	230°C
42AH	1.32	1.28	13.2	12.8	2,706	34	970	12.2	342	318	43	40	7.6	1.03	-0.1	-0.45	230°C
40AH	1.28	1.25	12.8	12.5	2,786	35	947	11.9	326	302	41	38	7.6	1.03	-0.1	-0.45	230°C
38AH	1.25	1.22	12.5	12.2	2,786	35	915	11.5	310	287	39	36	7.6	1.03	-0.1	-0.45	230°C
35AH	1.2	1.17	12	11.7	2,786	35	883	11.1	287	263	36	33	7.6	1.03	-0.1	-0.45	230°C
33AH	1.17	1.11	11.7	11.1	2,786	35	844	10.6	271	239	34	31	7.6	1.03	-0.1	-0.45	230°C
30AH	1.13	1.07	11.3	10.7	2,786	35	812	10.2	247	215	31	27	7.6	1.03	-0.1	-0.45	230°C
28AH	1.09	1.02	10.9	10.2	2,786	35	772	9.7	231	199	29	25	7.6	1.03	-0.1	-0.45	230°C

How to Choose the Right Neodymium Magnet Grade

N Series Neodymium Magnet Grades – 80°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
N56	1.51	1.5	15.1	14.7	876	11	836	10.5	454	414	57	52	7.5	1.05	-0.12	-0.76	80°C
N54	1.49	1.5	14.9	14.5	955	12	836	10.5	437	406	55	51	7.5	1.05	-0.12	-0.76	80°C
N52	1.46	1.4	14.6	14.2	955	12	836	10.5	422	390	53	49	7.5	1.05	-0.12	-0.76	80°C
N50	1.44	1.4	14.4	13.9	955	12	860	10.8	406	374	51	47	7.5	1.05	-0.12	-0.76	80°C
N48	1.43	1.4	14.3	13.7	955	12	860	10.8	390	358	49	45	7.5	1.05	-0.12	-0.76	80°C
N45	1.37	1.3	13.7	13.2	955	12	860	10.8	366	342	46	43	7.5	1.05	-0.12	-0.76	80°C
N42	1.32	1.3	13.2	12.8	955	12	860	10.8	342	318	43	40	7.5	1.05	-0.12	-0.76	80°C

Why Pull Force Is Not a Fixed Number

Pull force is not determined by magnet grade alone. The final holding force depends on magnet size, grade, magnetization direction, contact area, steel thickness, coating thickness, air gap, working temperature, and the testing method used.

For example, the same N52 neodymium magnet can show different pull force values when it is tested against a thick steel plate, a thin metal sheet, a coated surface, or an assembly with an air gap. A higher grade may not solve the problem if the design has limited contact area, high temperature, or poor magnetic circuit conditions.

For holding applications: confirm target pull force, contact surface, steel thickness, and safety factor.
For motor or coupling applications: confirm air gap, torque requirement, magnetization pattern, and working temperature.
For custom assemblies: send drawings, working distance, mating material, and required magnetic performance before sampling.

M Series Neodymium Magnet Grades – 100°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
56M	1.5	1.5	15	14.6	1,114	14	995	12.5	446	406	56	51	7.5	1.05	-0.12	-0.68	100°C
54M	1.49	1.4	14.9	14.4	1,114	14	1,035	13	438	398	55	50	7.5	1.05	-0.12	-0.68	100°C
52M	1.46	1.4	14.6	14.2	1,114	14	1,035	13	422	382	53	48	7.5	1.05	-0.12	-0.68	100°C
50M	1.44	1.4	14.4	13.9	1,114	14	1,035	13	406	374	51	47	7.5	1.05	-0.12	-0.68	100°C
48M	1.42	1.4	14.2	13.7	1,114	14	1,027	12.9	390	358	49	45	7.5	1.05	-0.12	-0.68	100°C
45M	1.37	1.3	13.7	13.2	1,114	14	995	12.5	366	342	46	43	7.5	1.05	-0.12	-0.68	100°C
42M	1.32	1.3	13.2	12.8	1,114	14	955	12	342	318	43	40	7.5	1.05	-0.12	-0.68	100°C
40M	1.28	1.3	12.8	12.5	1,114	14	923	11.6	326	302	41	38	7.5	1.05	-0.12	-0.68	100°C

H Series Neodymium Magnet Grades – 120°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
54H	1.49	1.44	14.9	14.4	1,353	17	1,075	13.5	438	398	55	50	7.5	1.05	-0.12	-0.66	120°C
52H	1.46	1.42	14.6	14.2	1,353	17	1,059	13.3	422	382	53	48	7.5	1.05	-0.12	-0.66	120°C
50H	1.44	1.39	14.4	13.9	1,353	17	1,043	13.1	406	374	51	47	7.5	1.05	-0.12	-0.66	120°C
48H	1.42	1.36	14.2	13.6	1,353	17	1,027	12.9	390	358	49	45	7.5	1.05	-0.12	-0.66	120°C
45H	1.37	1.32	13.7	13.2	1,353	17	995	12.5	366	342	46	43	7.5	1.05	-0.12	-0.66	120°C
42H	1.32	1.28	13.2	12.8	1,353	17	955	12	342	318	43	40	7.5	1.05	-0.12	-0.66	120°C
40H	1.28	1.25	12.8	12.5	1,353	17	923	11.6	326	302	41	38	7.5	1.05	-0.12	-0.66	120°C
38H	1.25	1.22	12.5	12.3	1,353	17	899	11.3	310	287	39	36	7.5	1.05	-0.12	-0.66	120°C
35H	1.22	1.17	12.2	11.7	1,353	17	868	10.9	287	263	36	33	7.5	1.05	-0.12	-0.66	120°C

SH Series Neodymium Magnet Grades – 150°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
54SH	1.49	1.44	14.9	14.4	1,592	20	1,075	13.5	438	398	55	50	7.5	1.04	-0.115	-0.56	150°C
52SH	1.46	1.42	14.6	14.2	1,592	20	1,059	13.3	422	390	53	49	7.5	1.04	-0.115	-0.56	150°C
50SH	1.42	1.39	14.2	13.9	1,592	20	1,043	13.1	406	374	51	47	7.5	1.04	-0.115	-0.56	150°C
48SH	1.4	1.36	14	13.6	1,592	20	1,035	13	390	358	49	45	7.5	1.04	-0.115	-0.56	150°C
45SH	1.37	1.32	13.7	13.2	1,592	20	995	12.5	366	342	46	43	7.5	1.04	-0.115	-0.56	150°C
42SH	1.32	1.28	13.2	12.8	1,592	20	955	12	342	318	43	40	7.5	1.04	-0.115	-0.56	150°C
40SH	1.28	1.25	12.8	12.5	1,592	20	939	11.8	326	302	41	38	7.5	1.04	-0.115	-0.56	150°C
38SH	1.25	1.22	12.5	12.2	1,592	20	907	11.4	310	287	39	36	7.5	1.04	-0.115	-0.56	150°C
35SH	1.22	1.17	12.2	11.7	1,592	20	876	11	287	263	36	33	7.5	1.04	-0.115	-0.56	150°C
33SH	1.17	1.13	11.7	11.3	1,592	20	844	10.6	271	247	34	31	7.5	1.04	-0.115	-0.56	150°C

UH Series Neodymium Magnet Grades – 180°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
52UH	1.46	1.42	14.6	14.2	1,990	25	1,059	13.3	422	390	53	49	7.55	1.03	-0.11	-0.5	180°C
50UH	1.42	1.39	14.2	13.9	1,990	25	1,043	13.1	406	374	51	47	7.55	1.03	-0.11	-0.5	180°C
48UH	1.4	1.36	14	13.6	1,990	25	1,031	12.9	390	358	49	45	7.55	1.03	-0.11	-0.5	180°C
45UH	1.36	1.32	13.6	13.2	1,990	25	1,003	12.6	366	342	46	43	7.55	1.03	-0.11	-0.5	180°C
42UH	1.32	1.28	13.2	12.8	1,990	25	971	12.2	342	318	43	40	7.55	1.03	-0.11	-0.5	180°C
40UH	1.28	1.25	12.8	12.5	1,990	25	923	11.6	326	302	41	38	7.55	1.03	-0.11	-0.5	180°C
38UH	1.25	1.22	12.5	12.2	1,990	25	907	11.4	310	287	39	36	7.55	1.03	-0.11	-0.5	180°C
35UH	1.22	1.17	12.2	11.7	1,990	25	860	10.8	287	263	36	33	7.55	1.03	-0.11	-0.5	180°C
33UH	1.17	1.13	11.7	11.3	1,990	25	852	10.7	271	247	34	31	7.55	1.03	-0.11	-0.5	180°C
30UH	1.13	1.08	11.3	10.8	1,990	25	812	10.2	247	223	31	28	7.55	1.03	-0.11	-0.5	180°C

EH Series Neodymium Magnet Grades – 200°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
50EH	1.42	1.39	14.2	13.9	2,308	29	1,043	13.1	406	374	51	47	7.6	1.03	-0.1	-0.45	200°C
48EH	1.36	1.4	13.5	14	2,308	29	1,031	12.9	390	358	49	45	7.6	1.03	-0.1	-0.45	200°C
45EH	1.36	1.32	13.6	13.2	2,388	30	1,003	12.6	366	342	46	43	7.6	1.03	-0.1	-0.45	200°C
42EH	1.32	1.28	13.2	12.8	2,388	30	970	12.2	342	318	43	40	7.6	1.03	-0.1	-0.45	200°C
40EH	1.28	1.25	12.8	12.5	2,388	30	947	11.9	326	302	41	38	7.6	1.03	-0.1	-0.45	200°C
38EH	1.25	1.22	12.5	12.2	2,388	30	915	11.5	310	287	39	36	7.6	1.03	-0.1	-0.45	200°C
35EH	1.22	1.17	12.2	11.7	2,388	30	884	11.1	287	263	36	33	7.6	1.03	-0.1	-0.45	200°C
33EH	1.17	1.13	11.7	11.3	2,388	30	860	10.8	271	247	34	31	7.6	1.03	-0.1	-0.45	200°C
30EH	1.13	1.08	11.3	10.8	2,388	30	820	10.3	247	223	31	28	7.6	1.03	-0.1	-0.45	200°C

AH Series Neodymium Magnet Grades – 230°C

Grade	Br (T) Max	Br (T) Min	Br (kGs) Max	Br (kGs) Min	HcJ (kA/m) Min	HcJ (kOe) Min	Hcb (kA/m) Min	Hcb (kOe) Min	(BH)max (kJ/m³) Max	(BH)max (kJ/m³) Min	(BH)max (MGOe) Max	(BH)max (MGOe) Min	Density (g/cm³) Min	Relative Recoil Permeability	Temp. Coef. Br (%/°C)	Temp. Coef. HcJ (%/°C)	Max. Working Temp. (L/D=0.7)
45AH	1.36	1.32	13.6	13.2	2,640	33	1,003	12.6	366	342	46	43	7.6	1.03	-0.1	-0.45	230°C
42AH	1.32	1.28	13.2	12.8	2,706	34	970	12.2	342	318	43	40	7.6	1.03	-0.1	-0.45	230°C
40AH	1.28	1.25	12.8	12.5	2,786	35	947	11.9	326	302	41	38	7.6	1.03	-0.1	-0.45	230°C
38AH	1.25	1.22	12.5	12.2	2,786	35	915	11.5	310	287	39	36	7.6	1.03	-0.1	-0.45	230°C
35AH	1.2	1.17	12	11.7	2,786	35	883	11.1	287	263	36	33	7.6	1.03	-0.1	-0.45	230°C
33AH	1.17	1.11	11.7	11.1	2,786	35	844	10.6	271	239	34	31	7.6	1.03	-0.1	-0.45	230°C
30AH	1.13	1.07	11.3	10.7	2,786	35	812	10.2	247	215	31	27	7.6	1.03	-0.1	-0.45	230°C
28AH	1.09	1.02	10.9	10.2	2,786	35	772	9.7	231	199	29	25	7.6	1.03	-0.1	-0.45	230°C

A higher grade does not always mean a better magnet. Size, air gap, working temperature, coating, and magnetization direction affect real performance.

Coatings for Neodymium Magnets

Coating	Common Use	Key Benefit
NiCuNi	General industrial	Durable clean finish
Zinc	Cost-sensitive projects	Basic protection
Epoxy	Humid environments	Better moisture resistance
Parylene	Precision parts	Thin uniform layer
Gold	Electronics	Conductive surface

Sizes, Tolerances and Magnetization Directions

Custom Sizes

Standard and project-specific dimensions based on drawings, samples, or application needs.

Tolerances

Critical for assemblies, motors, sensors, and precision devices.

Magnetization Direction

Axial, diametrical, radial, multi-pole, and custom options.

Magnetization Directions

Axial

Diametrical

Radial

Multi-pole

Standard vs Custom Neodymium Magnets: Which Should You Choose?

Choose standard magnets when you need common shapes, quick testing, and better cost control. Choose custom magnets when your product requires a special size, assembly fit, tolerance, coating, or magnetization direction.

Choose Standard Magnets When

You need common shapes and sizes
The application is simple holding or fixing
Fast sample testing is more important
Cost control is the main priority

Choose Custom Magnets When

You have a drawing or special size
The magnet must fit into an assembly
Tolerance, coating, and direction are critical
Performance and fit are project-specific

Where Are Neodymium Magnets Used?

Electric Motors

Neodymium arc segment magnets are commonly used in electric motors, generators, servo motors, and compact drive systems where high torque density is required. For motor projects, grade, HcJ, working temperature, magnetization direction, and dimensional tolerance should be confirmed before sampling.

Sensors and Encoders

Small disc, block, and custom NdFeB magnets are used in sensors, encoders, switches, and position-detection assemblies. The key selection factors are magnetic field stability, size tolerance, coating thickness, and consistent magnetization direction.

Medical Devices

Precision neodymium magnets can be used in medical devices, diagnostic equipment, and compact instrument assemblies when stable magnetic performance and clean surface quality are required. Material grade, coating, corrosion resistance, and packaging requirements should be reviewed carefully before production.

Industrial Fixtures

Block, disc, and countersunk neodymium magnets are widely used in fixtures, holding tools, positioning systems, and equipment panels. Pull force, steel contact area, working gap, mounting method, and safety factor should be checked before choosing a size.

Magnetic Couplings

Ring, arc, and custom neodymium magnets are used in magnetic couplings to transfer torque without direct mechanical contact. For coupling designs, torque requirement, air gap, operating speed, temperature, and magnetization pattern must be matched together.

Consumer Electronics

Compact neodymium magnets are used in loudspeakers, headphones, haptic motors, wearable devices, and small electronic assemblies. These projects usually require tight size tolerance, stable coating, consistent magnetic direction, and reliable batch repeatability.

Automotive and Robotics

Neodymium magnets are used in automotive sensors, small motors, robotic joints, actuators, and compact control systems. For these applications, temperature resistance, vibration conditions, coating durability, and long-term magnetic stability are more important than grade alone.

Wind Energy

High-coercivity neodymium magnets can be used in wind generators and energy systems where stable output and temperature resistance are important. Arc segment design, HcJ level, coating protection, and assembly method should be reviewed based on the generator structure.

How We Help You Select the Right Neodymium Magnet

Application Review
We first understand how the magnet will be used, not just the size you need.
Grade Recommendation
We help match grade with force, temperature, space, and cost requirements.
Coating Selection
We suggest coating options based on humidity, corrosion risk, appearance, and assembly needs.
Magnetization Direction Check
We confirm the right direction before sampling or production.
Sample-to-Production Support
We support sample testing before volume production when needed.

Quality Control for Neodymium Magnets

Raw Material and Grade Confirmation
Dimension Inspection
Surface and Coating Check
Magnetic Performance Testing
Magnetization Direction Confirmation
Packaging and Shipment Protection

Dimensional inspection for custom neodymium magnets

Magnetic performance testing for custom NdFeB magnets

Packaging and Shipping for Neodymium Magnets

Magnets are brittle and need protective packaging.
Strong magnets may require magnetic shielding for air shipment.
Bulk orders need clear labeling and stable carton or pallet packaging.
Custom packaging can be discussed for OEM or distributor needs.

Why Source Neodymium Magnets from Osenc?

Focused on NdFeB Magnets and Magnetic Assemblies
Better understanding of real magnetic applications.
Standard and Custom Supply
Buyers can source both common shapes and project-specific magnets.
Engineering-Friendly Communication
We can work from drawings, samples, target force, or application notes.
Flexible Support from Samples to Bulk Orders
Suitable for product testing, OEM projects, and repeat procurement.

Neodymium Magnets FAQ

What are neodymium magnets made of?

Neodymium magnets are made from neodymium, iron, and boron. They are also called NdFeB magnets, NIB magnets, or neo magnets.

Are neodymium magnets the strongest magnets?

They are among the strongest commercially available permanent magnets, especially for compact applications that need high magnetic force.

What grade of neodymium magnet should I choose?

It depends on size, pull force, temperature, air gap, coating, and cost. A higher grade is not always the best choice for every application.

Do neodymium magnets need coating?

Yes. Most neodymium magnets need coating because they are brittle and vulnerable to corrosion. Common coatings include NiCuNi, zinc, epoxy, parylene, and gold.

Can neodymium magnets be customized?

Yes. Shape, size, grade, coating, tolerance, and magnetization direction can often be customized based on drawings or application requirements.

What information should I send for a quote?

Send size, shape, grade, coating, magnetization direction, quantity, tolerance, application, and drawings if available.

Are neodymium magnets suitable for high-temperature use?

Standard grades have temperature limits. For high-temperature applications, buyers should confirm the correct temperature grade instead of only choosing a higher magnetic grade.