Neodymium Magnet Grade Chart: N35–N55 + High-Temperature Grades

This neodymium magnet grade chart compares 50 NdFeB grades across remanence (Br), normal coercivity (HcB), intrinsic coercivity (HcJ), maximum energy product (BHmax), reversible temperature coefficients and published maximum operating temperature. Use it as a numerical reference when comparing standard N grades with higher-coercivity M, H, SH, UH, EH and AH grades.

The grade number primarily reflects magnetic energy density, while the suffix identifies a higher-coercivity family. A higher number is not automatically the best choice: temperature, magnet geometry, permeance coefficient, opposing fields and the complete magnetic circuit can make coercivity more important than room-temperature BHmax.

How to Read the Neodymium Magnet Grade Chart

Property	Meaning	Why it matters
Br	Remanence / residual flux density	Indicates the material’s available residual magnetic flux.
HcB	Normal coercivity	Reverse field required to bring B to zero.
HcJ	Intrinsic coercivity	Key indicator of resistance to irreversible demagnetization.
BHmax	Maximum energy product	Primary basis of the NdFeB grade number and a measure of magnetic energy density.
Reversible temperature coefficient	Approximate change in Br or HcJ per °C	Shows how magnetic properties change as temperature changes.
Maximum operating temperature	Published grade-family guideline	Useful for screening, but not a universal safe limit for every geometry or magnetic circuit.

NdFeB Temperature and Coercivity Classes

Grade family	Typical HcJ class in this chart	Published max temperature in this chart	Typical selection reason
N / no suffix	About 876–955 kA/m	60–80 °C	General-purpose applications where maximum energy density or cost is the priority.
M	About 1,114 kA/m	100 °C	Moderately elevated temperature or increased demagnetization margin.
H	About 1,274–1,353 kA/m	120 °C	Motors, sensors and assemblies needing higher coercivity.
SH	About 1,512–1,592 kA/m	150 °C	Higher-temperature motors and industrial applications.
UH	About 1,910–1,990 kA/m	180 °C	Demanding thermal environments and stronger demagnetizing fields.
EH	About 2,388 kA/m	200 °C	Very high coercivity and elevated-temperature applications.
AH	About 2,706 kA/m	220 °C	Specialized high-temperature designs requiring very high coercivity.

Important: these temperature values are reference values from the grade table below, not universal guarantees. Actual safe operating temperature depends on magnet shape, permeance coefficient, working point, external demagnetizing field and the complete assembly. Use the Magnet Temperature Derating Calculator and Magnet Demagnetization Calculator for application-level screening.

Full Neodymium Magnet Grade Property Table

The table below preserves the full Radial Magnets reference data for standard and high-coercivity NdFeB grades. For unit conversions between Gauss/Tesla, Oersted/kA/m and MGOe/kJ/m³, use the Magnetic Unit Converter.

Grade	Br typical (mT)	Br typical (G)	HcB min (kA/m)	HcB min (Oe)	HcJ min (kA/m)	HcJ min (Oe)	BHmax typical (kJ/m³)	BHmax typical (MGOe)	Br temp. coef. (%/°C)	HcJ temp. coef. (%/°C)	Max temp. (°C)
N35	1210	12,100	860	10,800	955	12,000	283	35	-0.12	-0.618	80
N38	1260	12,600	860	10,800	955	12,000	306	38	-0.12	-0.75	80
N40	1285	12,850	923	11,600	955	12,000	318	40	-0.12	-0.75	80
N42	1315	13,150	860	10,800	955	12,000	334	42	-0.12	-0.75	80
N45	1350	13,500	860	10,800	955	12,000	350	44	-0.12	-0.75	80
N48	1400	14,000	836	10,500	955	12,000	390	49	-0.12	-0.75	80
N50	1425	14,250	836	10,500	955	12,000	390	49	-0.12	-0.75	80
N52	1450	14,500	836	10,500	876	11,000	406	51	-0.12	-0.75	60
N55	1490	14,900	716	9,000	876	11,000	430	54	-0.12	-0.75	60
N33M	1175	11,750	836	10,500	1114	14,000	267	34	-0.12	-0.675	100
N35M	1210	12,100	868	10,900	1114	14,000	283	35	-0.12	-0.675	100
N38M	1260	12,600	899	11,300	1114	14,000	307	39	-0.12	-0.675	100
N40M	1285	12,850	923	11,600	1114	14,000	322	40	-0.12	-0.675	100
N42M	1315	13,150	955	12,000	1114	14,000	338	42	-0.12	-0.675	100
N45M	1350	13,500	971	12,200	1114	14,000	354	44	-0.12	-0.675	100
N48M	1395	13,950	995	12,500	1114	14,000	378	48	-0.12	-0.675	100
N30H	1105	11,050	796	10,000	1353	17,000	235	30	-0.12	-0.605	120
N33H	1175	11,750	836	10,500	1353	17,000	267	34	-0.12	-0.605	120
N35H	1210	12,100	868	10,900	1353	17,000	283	35	-0.12	-0.605	120
N38H	1260	12,600	899	11,300	1353	17,000	307	39	-0.12	-0.605	120
N40H	1285	12,850	923	11,600	1353	17,000	322	40	-0.12	-0.605	120
N42H	1300	13,000	955	12,000	1353	17,000	330	41	-0.12	-0.605	120
N45H	1350	13,500	971	12,200	1353	17,000	354	44	-0.12	-0.605	120
N48H	1390	13,900	1011	12,700	1353	17,000	378	48	-0.12	-0.605	120
N50H	1415	14,150	1035	13,000	1274	16,000	390	49	-0.12	-0.605	120
N30SH	1125	11,250	811	10,200	1592	20,000	243	31	-0.12	-0.535	150
N33SH	1175	11,750	844	10,600	1592	20,000	267	34	-0.12	-0.535	150
N35SH	1210	12,100	876	11,000	1592	20,000	283	35	-0.12	-0.535	150
N38SH	1260	12,600	907	11,400	1592	20,000	307	39	-0.12	-0.535	150
N40SH	1285	12,850	939	11,800	1592	20,000	322	40	-0.12	-0.535	150
N42SH	1310	13,100	955	12,000	1592	20,000	330	41	-0.12	-0.535	150
N45SH	1350	13,500	979	12,300	1592	20,000	354	44	-0.12	-0.535	150
N48SH	1390	13,900	995	12,500	1512	19,000	374	47	-0.12	-0.535	150
N28UH	1075	10,750	764	9,600	1990	25,000	227	29	-0.12	-0.465	180
N30UH	1125	11,250	812	10,200	1990	25,000	243	31	-0.12	-0.465	180
N33UH	1175	11,750	852	10,700	1990	25,000	267	34	-0.12	-0.465	180
N35UH	1210	12,100	860	10,080	1990	25,000	283	35	-0.12	-0.465	180
N38UH	1260	12,600	876	11,000	1990	25,000	307	39	-0.12	-0.465	180
N40UH	1285	12,850	915	11,500	1990	25,000	318	40	-0.12	-0.465	180
N42UH	1310	13,100	955	12,000	1990	25,000	330	41	-0.12	-0.465	180
N45UH	1350	13,500	955	12,500	1910	24,000	358	45	-0.12	-0.465	180
N28EH	1085	10,850	780	9,800	2388	30,000	227	29	-0.12	-0.42	200
N30EH	1125	11,250	812	10,200	2388	30,000	243	31	-0.12	-0.42	200
N33EH	1165	11,650	820	10,300	2388	30,000	267	34	-0.12	-0.42	200
N35EH	1200	12,000	836	10,500	2388	30,000	279	35	-0.12	-0.42	200
N38EH	1235	12,350	899	11,300	2388	30,000	303	38	-0.12	-0.42	200
N40EH	1270	12,700	915	11,500	2388	30,000	314	39	-0.12	-0.42	200
N28AH	1075	10,750	780	9,800	2706	34,000	223	28	-0.12	-0.393	220
N30AH	1120	11,200	812	10,200	2706	34,000	239	30	-0.12	-0.393	220
N35AH	1195	11,950	883	11,100	2706	34,000	275	35	-0.12	-0.393	220

Which Neodymium Grade Should You Choose?

Do not select an NdFeB grade from the N-number alone. For room-temperature holding or general-purpose applications, an N35–N42 grade may already provide the required performance. Higher-energy grades such as N48, N52 or N55 can help when magnetic output must be maximized in a small volume, while H, SH, UH, EH and AH families become increasingly important as temperature and demagnetizing fields rise.

For a practical explanation of how the grade number and suffix work together, see Magnet Grades Explained: N35, N42, N52, H, SH & More. For individual datasheet interpretation, see How to Read a Magnet Datasheet: Br, HcJ & BHmax Explained.

Grade Selection Notes for Engineers and Buyers

Pull force is not a grade property. It also depends on dimensions, air gap, steel target and the magnetic circuit. Use the Magnet Pull Force Calculator.
Surface gauss is not the same as Br. Finished-part field depends heavily on geometry and measurement location. See How Gauss Measurement Works.
Maximum operating temperature is not the Curie temperature. Irreversible losses can occur well below Curie temperature if the operating point crosses the knee of the demagnetization curve.
Thin magnets can require more coercivity. Low-permeance geometries may have less demagnetization margin than thicker magnets of the same material grade.
Production specifications should define the complete requirement. Include grade, dimensions, tolerances, magnetization direction, coating, temperature, magnetic acceptance criteria and any PPAP or compliance documentation requirements.

Neodymium Grade Selection & Sourcing

If the dimensions and grade are already known, search Radial Magnets inventory. For engineered or custom requirements, use the Magnet RFQ Builder and include the operating temperature, magnetic requirement, geometry, coating and annual volume.

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