What are Neodymium Magnets?
One of the most powerful magnets on the market, the Neodymium is made out of the neodymium (Nd), iron (Fe), and boron (B) compounds, which differentiates it from other magnets because of its exceptional magnetic energy product and powerful strength. The material is often used in electric drives, headphones, and wind turbines.
While magnets like ferrite are quite affordable, they are also less magnetic. Though samarium cobalt magnets are great for withstanding high temperatures, they can be a bit pricey. On the other hand, alnico magnets are famous with their stability. However, if you are looking for superior performance, neodymium magnets are definitely the best choice to make.
Their classes are identified by an “N” with a number, for instance, N52 – the higher the number, the stronger the magnet. Currently, the N52 is the strongest, although the new N55 might refresh the benchmark. Which neodymium magnet grade is right for your needs?
From N35 to N52: Your Guide to Magnet Grades
You may have noticed that all neodymium magnets contain the letter ‘N’ and a number, e.g., N35, N42, or N52. But what do these numerical and alphabetical symbols stand for? If you are having a hard time deciding on the magnet you need, you may be asking yourself, ‘Is N52 better than N42?’ or ‘How much difference is there between N50 and N52?’ and so on. Be at peace! We assure you that a lucid and detailed analysis of what each parameter stands for will be given.
Neodymium magnets Data Sheets
| Grade | Remanence induction Br |
Coercive force Hcb |
Intrinsic Coercive force Hcj |
maximum Energy product (BH)max |
Temperature Tw |
Density |
||||
|---|---|---|---|---|---|---|---|---|---|---|
| T | KGs | KA/m | KOe | KA/m | KOe | KJ/m³ | MGOe | ℃ | g/cm³ | |
| N35 | 1.17-1.22 | 11.7-12.2 | =859 | =10.8 | =955 | =12 | 263-287 | 33-36 | =80 | =7.4 |
| N38 | 1.22-1.26 | 12.2-12.6 | =859 | =10.8 | =955 | =12 | 287-303 | 36-38 | =80 | =7.5 |
| N40 | 1.26-1.29 | 12.6-12.9 | =836 | =10.5 | =955 | =12 | 303-318 | 38-40 | =80 | =7.5 |
| N42 | 1.29-1.32 | 12.9-13.2 | =836 | =10.5 | =955 | =12 | 318-342 | 40-43 | =80 | =7.5 |
| N45 | 1.32-1.37 | 13.2-13.7 | =836 | =10.5 | =955 | =12 | 342-359 | 43-45 | =80 | =7.5 |
| N48 | 1.36-1.42 | 13.6-14.2 | =836 | =10.5 | =955 | =12 | 358-382 | 45-49 | =80 | =7.5 |
| N50 | 1.40-1.45 | 14.0-14.5 | =836 | =10.5 | =955 | =12 | 374-406 | 47-51 | =80 | =7.5 |
| N52 | 1.42-1.48 | 14.2-14.8 | =836 | =10.5 | =876 | =11 | 389-422 | 49-53 | =80 | =7.5 |
| N30M | 1.08-1.14 | 10.8-11.4 | =812 | =10.2 | =1114 | =14 | 223-247 | 28-31 | =100 | =7.5 |
| N33M | 1.14-1.17 | 11.4-11.7 | =852 | =10.7 | =1114 | =14 | 247-263 | 31-33 | =100 | =7.5 |
| N35M | 1.17-1.22 | 11.7-12.2 | =876 | =11.0 | =1114 | =14 | 263-287 | 33-36 | =100 | =7.5 |
| N38M | 1.22-1.26 | 12.2-12.6 | =916 | =11.5 | =1114 | =14 | 287-303 | 36-38 | =100 | =7.5 |
| N40M | 1.26-1.29 | 12.6-12.9 | =939 | =11.8 | =1114 | =14 | 303-318 | 38-40 | =100 | =7.5 |
| N42M | 1.29-1.32 | 12.9-13.2 | =955 | =12.0 | =1114 | =14 | 318-334 | 40-42 | =100 | =7.5 |
| N45M | 1.32-1.38 | 13.2-13.8 | =987 | =12.4 | =1114 | =14 | 334-366 | 42-46 | =100 | =7.5 |
| N48M | 1.36-1.42 | 13.6-14.2 | =1018 | =12.8 | =1114 | =14 | 358-390 | 45-49 | =100 | =7.5 |
| N50M | 1.39-1.45 | 13.9-14.5 | =1050 | =13.2 | =1114 | =14 | 374-406 | 47-51 | =100 | =7.5 |
| N30H | 1.08-1.14 | 10.8-11.4 | =812 | =10.2 | =1353 | =17 | 223-247 | 28-31 | =120 | =7.5 |
| N33H | 1.14-1.17 | 11.4-11.7 | =851 | =10.7 | =1353 | =17 | 247-263 | 31-33 | =120 | =7.5 |
| N35H | 1.17-1.22 | 11.7-12.2 | =875 | =11.0 | =1353 | =17 | 263-287 | 33-36 | =120 | =7.5 |
| N38H | 1.22-1.26 | 12.2-12.6 | =916 | =11.6 | =1353 | =17 | 287-303 | 36-38 | =120 | =7.5 |
| N40H | 1.26-1.29 | 12.6-12.9 | =939 | =11.8 | =1353 | =17 | 303-318 | 38-40 | =120 | =7.5 |
| N42H | 1.29-1.32 | 12.9-13.2 | =955 | =12.0 | =1353 | =17 | 318-334 | 40-42 | =120 | =7.5 |
| N45H | 1.32-1.38 | 13.2-13.8 | =987 | =12.4 | =1353 | =17 | 334-366 | 42-46 | =120 | =7.5 |
| N48H | 1.36-1.42 | 13.6-14.2 | =1026 | =12.9 | =1273 | =16 | 358-390 | 45-49 | =120 | =7.5 |
| N30SH | 1.08-1.14 | 10.8-11.4 | =812 | =10.2 | =1592 | =20 | 223-247 | 28-31 | =150 | =7.5 |
| N33SH | 1.14-1.17 | 11.4-11.7 | =851 | =10.7 | =1592 | =20 | 247-263 | 31-33 | =150 | =7.5 |
| N35SH | 1.17-1.22 | 11.7-12.2 | =876 | =11.0 | =1592 | =20 | 263-287 | 33-36 | =150 | =7.5 |
| N38SH | 1.22-1.26 | 12.2-12.6 | =899 | =11.3 | =1592 | =20 | 287-303 | 36-38 | =150 | =7.5 |
| N40SH | 1.26-1.29 | 12.6-12.9 | =931 | =11.7 | =1592 | =20 | 303-318 | 38-40 | =150 | =7.5 |
| N42SH | 1.29-1.32 | 12.9-13.2 | =963 | =12.1 | =1592 | =20 | 318-334 | 40-42 | =150 | =7.5 |
| N44SH | 1.30-1.36 | 13.0-13.6 | =995 | =12.3 | =1592 | =20 | 326-359 | 41-45 | =150 | =7.5 |
| N30UH | 1.08-1.14 | 10.8-11.4 | =812 | =10.2 | =1990 | =25 | 223-247 | 28-31 | =180 | =7.5 |
| N33UH | 1.14-1.17 | 11.4-11.7 | =851 | =10.7 | =1990 | =25 | 247-263 | 31-33 | =180 | =7.5 |
| N35UH | 1.17-1.22 | 11.7-12.2 | =875 | =11.0 | =1990 | =25 | 263-287 | 33-36 | =180 | =7.5 |
| N38UH | 1.22-1.26 | 12.2-12.6 | =915 | =11.5 | =1990 | =25 | 287-302 | 36-38 | =180 | =7.5 |
| N40UH | 1.26-1.32 | 12.6-13.2 | =939 | =11.8 | =1990 | =25 | 302-334 | 38-42 | =180 | =7.5 |
| N30EH | 1.08-1.14 | 10.8-11.4 | =812 | =10.2 | =2388 | =30 | 223-247 | 28-31 | =200 | =7.5 |
| N33EH | 1.14-1.17 | 11.4-11.7 | =851 | =10.7 | =2388 | =30 | 247-263 | 31-33 | =200 | =7.5 |
| N35EH | 1.17-1.25 | 11.7-12.5 | =875 | =11.0 | =2388 | =30 | 263-295 | 33-37 | =200 | =7.5 |
| N38EH | 1.22-1.29 | 12.2-12.9 | =907 | =11.4 | =2388 | =30 | 287-318 | 36-40 | =200 | =7.5 |
| N30AH | 1.08-1.20 | 10.8-12.0 | =860 | =10.8 | =2626 | =33 | 247-263 | 31-35 | =220 | =7.5 |
Maximum Energy Product (BHmax)
*Measured in MGOe (Mega Gauss Oersteds), this is the total “power” a magnet can pack. It’s like the magnet’s strength score—how much magnetic energy it can store and unleash.The higher the BHmax, the more punch the magnet has in a small size.
Remanence (Br)
*Measured in kGs (kilo Gauss), this is the magnet’s “natural sticking power”—how strong its magnetic field is after the external force is gone.
Coercivity (Hcb)
*Measured in kOe (kilo Oersteds), this shows how well the magnet resists outside forces trying to weaken its magnetism. It’s the magnet’s “toughness” under pressure.Hcb is like the magnet’s shield against interference.
Intrinsic Coercivity (Hcj)
*This is the hottest Temperature (in °C) the magnet can handle before its power fades or dies. Standard N-series magnets (N35 to N52) top out at 80°C, but special versions with letters (like N45M or N45SH) can take more heat thanks to higher Hcj.
Maximum Operating Temperature
*This is the hottest temperature (in °C) the magnet can handle before its power fades or dies. Standard N-series magnets (N35 to N52) top out at 80°C, but special versions with letters (like N45M or N45SH) can take more heat thanks to higher Hcj.
The Letter Codes:
N (no letter): Up to 80°C—like a regular day at home.
M: Up to 100°C—a bit of a warm challenge.
H: Up to 120°C—pretty toasty!
SH: Up to 150°C—serious heat warrior.
UH: Up to 180°C—built for tough jobs.
EH: Up to 200°C—extreme heat master.
VH: Up to 230°C—basically invincible!
N52 Magnet vs. N35, N40, N42, N45, N48, N50
N52 magnets vs N35 magnets
Neodymium iron boron magnets N52 and N35 are situated at the two ends of the spectrum. N52 magnet is much stronger in the point of magnetic strength, with a maximum energy product of 49-53 MGOe compared to N35’s 33-36 MGOe, which means that N52’s pulling force is almost 50% stronger. For example, N52 magnets can easily hold a 10-kilogram iron block, while N35 magnets might only manage 6-7 kilograms. The N52 magnet is much more expensive than the N35 magnet, about 1.3 to 1.4 times, due to its extensive use of rare earth materials.
In the respective applications, an N35 magnet is fine for elementary situations such as refrigerator magnets or magnetic toys. An N52 magnet is the over-high performer of the two and is widely used in high-performance products such as electric vehicle motors or wind turbine generators that are strong enough to move the turbine. An N35 magnet will suffice if your budget is limited and you don’t necessarily look for magnetic strength.
N35 and N52 magnets offer very different magnetic field strength and stability levels, which is extremely obvious from the performance comparison. These figures are obtained through the B-H curve (relationship between magnetic induction B and magnetic field strength H) and the J-H curve (relationship between magnetic polarization J and magnetic field strength H). N52 magnets, on the one hand, indicate a higher induction strength and more significant resistance to demagnetization, as shown through the curves of both magnetizations.
It can also be noted that it is excellent that the magnetic induction strength of N52 magnets is not weakened as such when the magnetic field strength is high (H values are larger), which means that a high level of magnetic performance can be maintained under high magnetic field strength conditions. However, the demagnetization curve of N35 magnets gives a dramatic fall in the magnetic induction strength. It is possible to use very much demagnetization, suggesting that they are more suitable for use in low magnetic field strength environments.
N52 magnets vs N40 magnets
The highest energy product rating of N52 magnets is 49-53 MGOe, while N40 magnets are capable of only 36-38 MGOe, meaning N52 magnets are almost one-third percent stronger than N40 magnets. Exempli gratia, if the same-sized magnets, N52 magnets may hold 8 kilograms, whereas N40 magnets may reach 6 kilograms. However, N52 magnets, like porcelain, are more brittle and prone to breaking, requiring careful handling during processing, while N40 magnets are somewhat sturdier. On the other hand, N52 magnets cost 127-134% more than N40 magnets as they are high-performance magnets.
N52 magnets vs N42 magnets
N52 and N42 are two substances of neodymium iron boron magnets that are often compared. The energy product of N52 magnets is in the range 49-53 MGOe, while the range of N42 magnets is contained in the interval (40-43) MGOe. Apart from that, the magnetic strength of the N52 magnet is about a fifth greater than that of the N42 magnet. A natural measurement is not only 5 kg. An N52 might hold an object weighing 5 kilograms, but an N42 has a much lower chance of 4 kilograms. A surface magnetic field can also reach a maximum value of 14-14.5 kGs for N52 magnets as opposed to not going over 12.8-13.2 kGs for N42 magnets.
N42 magnets are cheaper than N52 magnets, which is the reason for about one-third of the high price of N52 magnets. On top of that, N42 magnets have durability and performance in mind, allowing their use in applications such as the design of magnetic closures (such as bag clasps) and the running of washing machine motors.
N52 magnets vs N45 magnets
The discrepancy between N52 and N45 isn’t wide, but the specific factors make the distinction. There is an N52 energy product of 49-53 MGOe, while an N45 magnet is 43-45 MGOe. Regarding the magnetic force, the N52 magnet is about one-sixth stronger than the N45. The N52 magnet can hold 6 kilograms of the same size, while the N45 might hold 5 kilograms. Surface magnetic fields are also different. Compared with the N52 magnet, which is more brittle and easily cracked, the N45 magnet with an ‘H’ suffix is less likely to break at high temperatures, up to 120°C.
As for the price, N52 magnet is 15-25% more expensive than N45. As a physical object, N45 magnet shows a nice balance. It is suitable for implementation in various industries, such as car sensors, magnetic tools, or industrial clamps, offering both performance and cost savings.
N52 magnets vs N48 magnets
The comparison between N52 and N48 is like a showdown between top-tier competitors. The N52 magnet has an energy product range of 49-53 MGOe; that of the N48 magnet is 45-49 MGOe. Regarding the strength of the magnet, the N52 magnet is only 10% stronger than the N48 magnet; for example, the N52 magnet can withstand 10 kilograms of weight, while the N48 magnet may withstand 9 kilograms. Both surface magnetic fields are also in the same range. N52 magnet surface magnetic field is 14-14.5 kGs, whereas N48 magnet is 13.8-14.2 kGs.
In terms of price, the N52 magnet is between 10 and 20% more expensive than the N48 magnet, but since the strength of the magnet is almost the same, the price difference is insignificant. N48 magnet is already very powerful in terms of applications, which makes it suitable for products such as magnetic stirrers, heavy-duty magnetic clamps, or high-efficiency generators.
N52 magnets vs N50 magnets
N52 and N50 represent the ultimate showdown among neodymium iron boron magnets. N52 magnet banks use about 49-53 MGOe to deliver their energy products, while N50 magnet is just a little bit weaker, with only about 47-51 MGOe. In regard to the strength of magnetic forces, the N52 magnet is only slightly stronger than the N50 magnet. The N52 magnet can make 10 kilograms stay, while the N50 magnet makes 9.8, which is only a small difference, so it is almost imperceptible. In addition, the N52 magnet is more fragile and has to be handled with care, whereas the N50 magnet is somewhat sturdier.
Speaking of cost, the price of the N50 magnet is 5-15% less than that of the N52 magnet, so they are quite similar in performance, but the N50 magnet proves to be a better deal. When it comes to applications, the N50 magnet is a very practical high-performance rival; it is perfect for magnetic conveyor belts, precision instruments, and powerful magnetic frames. On the other hand, the N52 magnet takes the top honors and is normally used for science experiments like particle accelerators and ultra-small electric motors. If the project’s financial resources are limited, and high performance is a must, the N50 magnet is already good enough; otherwise, the N52 magnet is still unbeatable.
How to Choose the Right Grade
Finding the Right Temperature Grade
Neodymium magnets start with “N” followed by a number—like N35 or N52—which shows their strength; higher numbers mean more power. Suffixes like H, SH, UH, or EH indicate how much heat they can take. Pick H or SH grades for hot environments to avoid losing magnetism. Need strong performance for advanced applications? N45-N52 are ideal, though pricier. For everyday uses like fixtures, N35-N42 works well and saves you money.
Balancing Cost and Performance
We’re here to help you get the best value. Higher grades like N52 offer great strength (higher BHmax), but costs rise fast—N52 can be 30%-50% more than N35 for just 15%-25% extra power. Unless you need top performance, mid-range grades often do the job without the added expense or processing challenges. Let’s match the grade to your needs—effective and budget-friendly.
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