Both N35 and N52 are grades of neodymium (NdFeB) magnets, and the grade number primarily indicates the magnet's maximum energy product (BHmax)—a key measure of magnetic strength.
| Grade | Max Energy Product (BHmax) | Typical Pull Force* |
| N35 | ~35 MGOe | Lower |
| N52 | ~52 MGOe | Much higher |
*Pull force depends on magnet size, shape, and test conditions, but for the same dimensions, an N52 magnet can be ~40–50% stronger than N35.
N52
Strongest commercially available neodymium grade
Higher magnetic flux density
Allows smaller magnets with the same holding force
Ideal for high-performance motors, EVs, sensors, and compact devices
N35
Standard, cost-effective grade
Adequate for general industrial and consumer applications
Often chosen where extreme strength is not required
Higher magnetic strength does not automatically mean better heat resistance:
Standard N35 and N52 grades are typically rated up to 80 °C
For higher temperatures, special grades are needed (e.g., N35SH, N52H, N52SH)
In high-temperature environments, a lower-strength grade with better thermal stability may outperform a higher-strength one.
Stronger magnet: ✅ N52
More economical: N35
Best choice depends on: required pull force, size constraints, temperature, and cost
