Sintered NdFeB magnets originated in 1983 and are currently among the highest-performance magnetic materials available. Due to their susceptibility to oxidation, surface anti-corrosion coatings are typically applied, such as zinc, nickel-copper-nickel, chromium, or epoxy. With excellent machinability, they can be manufactured into various shapes and sizes according to customer requirements.
| Grade | Residual Induction | Coercive Force | Intrinsic Coercive Force | Maximum Energy Product | Working Temp | ||||
| Br | Hcb | Hcj | （ BH ） max | Tw | |||||
| mT | KGs | kA/m | (kOe) | kA/m | (kOe) | kJ/m3 | (MGOe) | ||
| N30 | 1080-1130 | (10.8-11.3) | ≥ 796 | ( ≥ 10.0) | ≥ 955 | ( ≥ 12) | 223-247 | (28-31) | ≤80 ℃ |
| N33 | 1130-1180 | (11.3-11.8) | ≥ 836 | ( ≥ 10.5) | ≥ 955 | ( ≥ 12) | 247-271 | (31-34) | ≤80 ℃ |
| N35 | 1180-1220 | (11.8-12.2) | ≥ 868 | ( ≥ 10.9) | ≥ 955 | ( ≥ 12) | 263-287 | (33-36) | ≤80 ℃ |
| N38 | 1230-1260 | (12.3-12.6) | ≥ 876 | ( ≥ 11.0) | ≥ 955 | ( ≥ 12) | 287-310 | (36-39) | ≤80 ℃ |
| N40 | 1260-1290 | (12.6-12.9) | ≥ 876 | ( ≥ 11.0) | ≥ 955 | ( ≥ 12) | 302-326 | (38-41) | ≤80 ℃ |
| N42 | 1290-1320 | (12.9-13.2) | ≥ 876 | ( ≥ 11.0) | ≥ 955 | ( ≥ 12) | 318-342 | (40-43) | ≤80 ℃ |
| N45 | 1320-1370 | (13.2-13.7) | ≥ 876 | ( ≥ 11.0) | ≥ 955 | ( ≥ 12) | 342-366 | (43-46) | ≤80 ℃ |
| N48 | 1370-1430 | (13.7-14.3) | ≥ 876 | ( ≥ 11.0) | ≥ 955 | ( ≥ 12) | 358-390 | (45-49) | ≤80 ℃ |
| N50 | 1400-1450 | (14.0-14.5) | ≥ 876 | ( ≥ 11.0) | ≥ 955 | ( ≥ 12) | 374-406 | (47-51) | ≤80 ℃ |
| N52 | 1420-1480 | (14.2-14.8) | ≥ 836 | ( ≥ 10.5) | ≥ 876 | ( ≥ 11) | 390-422 | (49-53) | ≤80 ℃ |
| N54 | 1450-1500 | (14.5-15.0) | ≥ 836 | ( ≥ 10.5) | ≥ 876 | ( ≥ 11) | 406-438 | (51-55) | ≤80 ℃ |
| N56 | 1470-1500 | (14.7-15.0) | ≥ 836 | ( ≥ 10.5) | ≥ 876 | ( ≥ 11) | 422-454 | (53-57) | ≤80 ℃ |
| N35M | 1180-1230 | (11.8-12.3) | ≥ 860 | ( ≥ 10.8) | ≥ 1114 | ( ≥ 14) | 263-287 | (33-36) | ≤100 ℃ |
| N38M | 1230-1260 | (12.3-12.6) | ≥ 876 | ( ≥ 11.0) | ≥ 1114 | ( ≥ 14) | 287-310 | (36-39) | ≤100 ℃ |
| N40M | 1260-1290 | (12.6-12.9) | ≥ 907 | ( ≥ 11.4) | ≥ 1114 | ( ≥ 14) | 302-326 | (38-41) | ≤100 ℃ |
| N42M | 1290-1320 | (12.9-13.2) | ≥ 939 | ( ≥ 11.8) | ≥ 1114 | ( ≥ 14) | 318-342 | (40-43) | ≤100 ℃ |
| N45M | 1320-1370 | (13.2-13.7) | ≥ 971 | ( ≥ 12.2) | ≥ 1114 | ( ≥ 14) | 342-366 | (43-46) | ≤100 ℃ |
| N48M | 1370-1430 | (13.7-14.3) | ≥ 1011 | ( ≥ 12.7) | ≥ 1114 | ( ≥ 14) | 358-390 | (45-49) | ≤100 ℃ |
| N50M | 1400-1450 | (14.0-14.5) | ≥ 1035 | ( ≥ 13.0) | ≥ 1114 | ( ≥ 14) | 374-406 | (47-51) | ≤100 ℃ |
| N52M | 1420-1480 | (14.2-14.8) | ≥ 1051 | ( ≥ 13.2) | ≥ 1114 | ( ≥ 14) | 390-422 | (49-53) | ≤100 ℃ |
| N54M | 1440-1500 | (14.4-15.0) | ≥ 1059 | ( ≥ 13.3) | ≥ 1114 | ( ≥ 14) | 398-438 | (50-55) | ≤100 ℃ |
| N33H | 1130-1180 | (11.3-11.8) | ≥ 844 | ( ≥ 10.6) | ≥ 1353 | ( ≥ 17) | 247-271 | (31-34) | ≤120 ℃ |
| N35H | 1180-1230 | (11.8-12.3) | ≥ 876 | ( ≥ 11.0) | ≥ 1353 | ( ≥ 17) | 263-287 | (33-36) | ≤120 ℃ |
| N38H | 1230-1260 | (12.3-12.6) | ≥ 907 | ( ≥ 11.4) | ≥ 1353 | ( ≥ 17) | 287-310 | (36-39) | ≤120 ℃ |
| N40H | 1260-1290 | (12.6-12.9) | ≥ 931 | ( ≥ 11.7) | ≥ 1353 | ( ≥ 17) | 302-326 | (38-41) | ≤120 ℃ |
| N42H | 1290-1320 | (12.9-13.2) | ≥ 955 | ( ≥ 12.0) | ≥ 1353 | ( ≥ 17) | 318-342 | (40-43) | ≤120 ℃ |
| N45H | 1320-1370 | (13.2-13.7) | ≥ 995 | ( ≥ 12.5) | ≥ 1353 | ( ≥ 17) | 342-366 | (43-46) | ≤120 ℃ |
| N48H | 1370-1430 | (13.7-14.3) | ≥ 1019 | ( ≥ 12.8) | ≥ 1353 | ( ≥ 17) | 358-390 | (45-49) | ≤120 ℃ |
| N50H | 1400-1450 | (14.0-14.5) | ≥ 1035 | ( ≥ 13.0) | ≥ 1274 | ( ≥ 16) | 374-406 | (47-51) | ≤120 ℃ |
| N52H | 1420-1480 | (14.2-14.8) | ≥ 1043 | ( ≥ 13.1) | ≥ 1274 | ( ≥ 16) | 390-422 | (49-53) | ≤120 ℃ |
| N54H | 1440-1490 | (14.4-14.9) | ≥ 1051 | ( ≥ 13.2) | ≥ 1274 | ( ≥ 16) | 398-438 | (50-55) | ≤120 ℃ |
| Grade | Residual Induction | Coercive Force | Intrinsic Coercive Force | Maximum Energy Product | Working Temp | ||||
| Br | Hcb | Hcj | （ BH ） max | Tw | |||||
| mT | KGs | kA/m | (kOe) | kA/m | (kOe) | kJ/m3 | (MGOe) | ||
| N33SH | 1130-1180 | (11.3-11.8) | ≥ 836 | ( ≥ 10.5) | ≥ 1592 | ( ≥ 20) | 247-271 | (31-34) | ≤150 ℃ |
| N35SH | 1180-1230 | (11.8-12.3) | ≥ 876 | ( ≥ 11.0) | ≥ 1592 | ( ≥ 20) | 263-287 | (33-36) | ≤150 ℃ |
| N38SH | 1230-1260 | (12.3-12.6) | ≥ 884 | ( ≥ 11.1) | ≥ 1592 | ( ≥ 20) | 287-310 | (36-39) | ≤150 ℃ |
| N40SH | 1260-1290 | (12.6-12.9) | ≥ 915 | ( ≥ 11.5) | ≥ 1592 | ( ≥ 20) | 302-326 | (38-41) | ≤150 ℃ |
| N42SH | 1290-1320 | (12.9-13.2) | ≥ 955 | ( ≥ 12.0) | ≥ 1592 | ( ≥ 20) | 318-342 | (40-43) | ≤150 ℃ |
| N45SH | 1320-1370 | (13.2-13.7) | ≥ 995 | ( ≥ 12.5) | ≥ 1592 | ( ≥ 20) | 342-366 | (43-46) | ≤150 ℃ |
| N48SH | 1370-1430 | (13.7-14.3) | ≥ 1019 | ( ≥ 12.8) | ≥ 1512 | ( ≥ 19) | 358-390 | (45-49) | ≤150 ℃ |
| N50SH | 1400-1450 | (14.0-14.5) | ≥ 1035 | ( ≥ 13.0) | ≥ 1512 | ( ≥ 19) | 374-406 | (47-51) | ≤150 ℃ |
| N52SH | 1420-1480 | (14.2-14.8) | ≥ 1043 | ( ≥ 13.1) | ≥ 1512 | ( ≥ 19) | 390-422 | (49-53) | ≤150 ℃ |
| N54SH | 1440-1500 | (14.4-15.0) | ≥ 1059 | ( ≥ 13.3) | ≥ 1512 | ( ≥ 19) | 398-438 | (50-55) | ≤150 ℃ |
| N30UH | 1080-1130 | (10.8-11.3) | ≥ 756 | ( ≥ 9.5) | ≥ 1990 | ( ≥ 25) | 223-247 | (28-31) | ≤180 ℃ |
| N33UH | 1130-1180 | (11.3-11.8) | ≥ 820 | ( ≥ 10.3) | ≥ 1990 | ( ≥ 25) | 247-271 | (31-34) | ≤180 ℃ |
| N35UH | 1180-1230 | (11.8-12.3) | ≥ 844 | ( ≥ 10.6) | ≥ 1990 | ( ≥ 25) | 263-287 | (33-36) | ≤180 ℃ |
| N38UH | 1230-1260 | (12.3-12.6) | ≥ 884 | ( ≥ 11.1) | ≥ 1990 | ( ≥ 25) | 287-310 | (36-39) | ≤180 ℃ |
| N40UH | 1260-1290 | (12.6-12.9) | ≥ 915 | ( ≥ 11.5) | ≥ 1990 | ( ≥ 25) | 302-326 | (38-41) | ≤180 ℃ |
| N42UH | 1290-1320 | (12.9-13.2) | ≥ 939 | ( ≥ 11.8) | ≥ 1990 | ( ≥ 25) | 318-342 | (40-43) | ≤180 ℃ |
| N45UH | 1320-1360 | (13.2-13.6) | ≥ 971 | ( ≥ 12.2) | ≥ 1990 | ( ≥ 25) | 342-366 | (43-46) | ≤180 ℃ |
| N48UH | 1360-1430 | (13.6-14.3) | ≥ 1019 | ( ≥ 12.8) | ≥ 1990 | ( ≥ 25) | 358-390 | (45-49) | ≤180 ℃ |
| N50UH | 1400-1450 | (14.0-14.5) | ≥ 1035 | ( ≥ 13.0) | ≥ 1990 | ( ≥ 25) | 374-406 | (47-51) | ≤180 ℃ |
| N52UH | 1420-1480 | (14.2-14.8) | ≥ 1043 | ( ≥ 13.1) | ≥ 1990 | ( ≥ 25) | 390-422 | (49-53) | ≤180 ℃ |
| N54UH | 1440-1500 | (14.4-15.0) | ≥ 1059 | ( ≥ 13.3) | ≥ 1990 | ( ≥ 25) | 398-438 | (50-55) | ≤180 ℃ |
| N28EH | 1040-1080 | (10.4-10.8) | ≥ 756 | ( ≥ 9.5) | ≥ 2388 | ( ≥ 30) | 207-231 | (26-29) | ≤200 ℃ |
| N30EH | 1080-1130 | (10.8-11.3) | ≥ 756 | ( ≥ 9.5) | ≥ 2388 | ( ≥ 30) | 223-247 | (28-31) | ≤200 ℃ |
| N33EH | 1130-1180 | (11.3-11.8) | ≥ 820 | ( ≥ 10.3) | ≥ 2388 | ( ≥ 30) | 247-271 | (31-34) | ≤200 ℃ |
| N35EH | 1180-1220 | (11.8-12.2) | ≥ 884 | ( ≥ 11.1) | ≥ 2388 | ( ≥ 30) | 263-287 | (33-36) | ≤200 ℃ |
| N38EH | 1220-1260 | (12.2-12.6) | ≥ 923 | ( ≥ 11.6) | ≥ 2388 | ( ≥ 30) | 279-310 | (35-39) | ≤200 ℃ |
| N40EH | 1260-1290 | (12.6-12.9) | ≥ 947 | ( ≥ 11.9) | ≥ 2388 | ( ≥ 30) | 295-326 | (37-41) | ≤200 ℃ |
| N42EH | 1290-1320 | (12.9-13.2) | ≥ 971 | ( ≥ 12.2) | ≥ 2308 | ( ≥ 29) | 310-342 | (39-43) | ≤200 ℃ |
| N45EH | 1320-1360 | (13.2-13.6) | ≥ 979 | ( ≥ 12.3) | ≥ 2308 | ( ≥ 29) | 342-366 | (43-46) | ≤200 ℃ |
| N48EH | 1360-1430 | (13.6-14.3) | ≥ 987 | ( ≥ 12.4) | ≥ 2308 | ( ≥ 29) | 358-390 | (45-49) | ≤200 ℃ |
| N28AH | 1040-1080 | (10.4-10.8) | ≥ 756 | ( ≥ 9.5) | ≥ 2786 | ( ≥ 35) | 207-231 | (26-29) | ≤230 ℃ |
| N30AH | 1080-1130 | (10.8-11.3) | ≥ 804 | ( ≥ 10.1) | ≥ 2786 | ( ≥ 35) | 223-247 | (28-31) | ≤230 ℃ |
| N33AH | 1130-1180 | (11.3-11.8) | ≥ 812 | ( ≥ 10.2) | ≥ 2786 | ( ≥ 35) | 247-271 | (31-34) | ≤230 ℃ |
| N35AH | 1180-1220 | (11.8-12.2) | ≥ 844 | ( ≥ 10.6) | ≥ 2786 | ( ≥ 35) | 263-287 | (33-36) | ≤230 ℃ |
| N38AH | 1220-1260 | (12.2-12.6) | ≥ 860 | ( ≥ 10.8) | ≥ 2786 | ( ≥ 35) | 287-310 | (36-39) | ≤230 ℃ |
| N40AH | 1260-1290 | (12.6-12.9) | ≥ 876 | ( ≥ 11.0) | ≥ 2786 | ( ≥ 35) | 295-326 | (37-41) | ≤230 ℃ |
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Bonded NdFeB magnets is widely used in all kinds of micro motors, such as spindle motor, stepping motor, synchronous motor, DC motor and brushless DC motor. It can replace sintered NdFeB magnets and ferrite, making motor assembling simpler and more reliable, reducing costs and improving efficiency.
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