Neodymium Magnets | Arnold Magnetic Technologies
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Neodymium Iron Boron Magnets

Neodymium iron boron (NdFeB), or "neo", magnets offer the highest energy product of any material today and are available in a wide range of shapes, sizes and grades. Neo magnets can be found in a variety of applications including high performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors and loudspeakers.

Magnetic properties will differ depending upon alignment direction during compaction and upon size and shape. Download individual spec sheets from the table below, or get the full neo catalog here for specific grades and their magnetic properties, including the trade-off in Br (and energy product) for HcJ (intrinsic coercivity, resistance to demagnetization). 

Maximum Use Temperature and Corrosion

Determining whether or not to use neo magnets instead of our RECOMA® SmCo magnets, for example, is a function of the maximum temperature of the application, required magnetic output at typical use temperature and total cost of the system.  

Neo magnets have some limitations due to their corrosive behavior. In humid applications, a protective coating is highly recommended. Coatings which have been used successfully include epoxy coating, nickel plating and combinations of these coatings. Arnold also has the capability to apply Parylene coating to neo magnets. Effectiveness of coating is dependent upon the quality of the base material. Arnold has evaluated multiple manufacturers for corrosion resistance of the base material and only supplies licensed, highly corrosion-resistant materials produced under tight control. 

Available Neo Grades



Properties: Br HcB HcJ BHmax Rev. Temp. Coef. Temp.
Grade Typical mT Typical gauss min kA/m min oersteds min kA/m min oersteds Typical kJ/m3 Typical MGOe Br %/°C HcJ %/°C max °C
N30 1105 11,050 796 10,000 955 12,000 235 30 -0.12 -0.75 80
N33 1150 11,500 836 10,500 955 12,000 259 33 -0.12 -0.75 80
N35 1210 12,100 860 10,800 955 12,000 283 35 -0.12 -0.75 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 12,000 374 47 -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
N50M 1415 14,150 1035 13,000 1114 14,000 390 49 -0.12 -0.675 100
N52M 1445 14,450 995 12,500 1035 13,000 406 51 -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
N42EH 1310 13,100 971 12,200 2308 29,000 326 41 -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
N33AH 1140 11,400 812 10,200 2706 34,000 231 29 -0.12 -0.393 220
N35AH 1195 11,950 883 11,100 2706 34,000 275 35 -0.12 -0.393 220
N38AH 1240 12,400 923 11,600 2626 33,000 299 38 -0.12 -0.393 220
N35X 1210 12,100 860 10,800 955 12,000 283 35 -0.11 -0.75 80
N35MX 1210 12,100 868 10,900 1114 14,000 283 35 -0.11 -0.675 100
N45MX 1350 13,500 971 12,200 1114 14,000 354 44 -0.11 -0.675 100
N38HX 1260 12,600 899 11,300 1353 17,000 307 39 -0.11 -0.605 120
N40HX 1285 12,850 923 11,600 1353 17,000 322 40 -0.11 -0.605 120
N45HX 1350 13,500 971 12,200 1353 17,000 354 44 -0.11 -0.605 120
N33SHX 1175 11,750 844 10,600 1592 20,000 267 34 -0.11 -0.535 150
N35SHX 1210 12,100 876 11,000 1592 20,000 283 35 -0.11 -0.535 150
N38SHX 1260 12,600 907 11,400 1592 20,000 307 39 -0.11 -0.535 150
N42SHX 1310 13,100 955 12,000 1592 20,000 330 41 -0.11 -0.535 150
N30SHZ 1125 11,250 804 10,100 1592 20,000 243 31 -0.1 -0.535 150
N33SHZ 1175 11,750 844 10,600 1592 20,000 267 34 -0.1 -0.535 150
N35SHZ 1210 12,100 876 11,000 1592 20,000 283 35 -0.1 -0.535 150
N38SHZ 1260 12,600 907 11,400 1592 20,000 307 39 -0.1 -0.535 150
N45SHZ 1350 13,500 979 12,300 1592 20,000 354 44 -0.1 -0.535 150
N30UHZ 1125 11,250 812 10,200 1990 25,000 243 31 -0.1 -0.465 180
N33UHZ 1175 11,750 852 10,700 1990 25,000 267 34 -0.1 -0.465 180
N38UHZ 1260 12,600 876 11,000 1990 25,000 307 39 -0.1 -0.465 180
N40UHZ 1285 12,850 915 11,500 1990 25,000 318 40 -0.1 -0.465 180
N30EHZ 1125 11,250 812 10,200 2388 30,000 243 31 -0.1 -0.42 200
N38EHZ 1235 12,350 899 11,300 2388 30,000 303 38 -0.1 -0.42 200
N30AHZ 1120 11,200 812 10,200 2706 34,000 239 30 -0.1 -0.393 220