What Is N45UH?
N45UH is the upper limit of commercial NdFeB combining 43+ MGOe with 180°C continuous service. Production is concentrated among a very small number of qualified factories. Typical applications include premium EV traction motors, jet aircraft auxiliary motors, and competition-grade servo drives.
N45UH Technical Specifications
| Remanence (Br) | 13.2–13.7 kGs (1.32–1.37 T) |
| Coercive Force (HcB) | ≥12.5 kOe (≥995 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥25 kOe (≥1990 kA/m) |
| Energy Product (BHmax) | 43–46 MGOe (342–366 kJ/m³) |
| Max Operating Temperature | 180°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.50 %/°C |
| Density (typical) | 7.5 g/cm³ |
| Vickers Hardness (typical) | 550–650 HV |
Values per IEC 60404-5 / GB/T 13560. Actual production values fall within the range quoted; batch-specific BH-curve data is provided on every certificate of conformance.
Where N45UH Is Used
N45UH is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
EV Motors
High-performance NdFeB magnets for electric vehicle traction motors, auxiliary drives, and e-axle systems — with the temperature stability and flux density required for continuous high-torque service.
Aerospace & Defense
High-temperature NdFeB magnets for aerospace actuators, flight-control servos, defense systems, and downhole tools — with the documentation, export licensing, and material verification these programs demand.
Recommended Coatings for N45UH
Coating choice is driven by operating environment and assembly method. For N45UH, the typical options are:
- •NiCuNi
- •Epoxy over NiCuNi
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Design Considerations When Specifying N45UH
- 01Extremely limited global production capacity — supplier qualification is non-trivial.
- 02Heavy rare earth loading is significant — GBD processing materially impacts landed cost.
- 03Plan long lead times and secure capacity with long-term agreements.
Related Grades
Frequently Asked Questions
What is N45UH NdFeB magnet?
+
N45UH is the upper limit of commercial NdFeB combining 43+ MGOe with 180°C continuous service. Production is concentrated among a very small number of qualified factories. Typical applications include premium EV traction motors, jet aircraft auxiliary motors, and competition-grade servo drives.
What is the maximum operating temperature of N45UH?
+
N45UH sintered NdFeB is rated for continuous operation up to 180°C. This is the practical upper limit before thermal demagnetization begins to affect performance. For a safety margin, design for a working temperature at least 20–30°C below the maximum rating.
What is the BHmax of N45UH?
+
N45UH delivers an energy product (BHmax) in the range of 43–46 MGOe (342–366 kJ/m³). This is the maximum magnetic energy density the grade can produce, measured according to standard IEC 60404-5 magnetic testing.
What applications use N45UH magnets?
+
N45UH is typically specified for EV Motors, Aerospace & Defense. The grade's combination of 43–46 MGOe (342–366 kJ/m³) energy product and 180°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N45UH Magnets
Factory-direct supply from Mainrich International. IATF 16949 certified, EU-office support from London, 97% on-time delivery. Share your dimensions, quantity, and target application — we will quote within two business days.