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.
Wind Turbines
High-performance NdFeB magnet blocks and tile assemblies for permanent-magnet synchronous generators used in direct-drive and medium-speed wind turbines.
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?
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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?
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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?
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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?
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N45UH is typically specified for EV Motors, Aerospace & Defense, Wind Turbines. 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.