What Is N35UH?
N35UH is the entry grade in the UH family, prioritizing maximum intrinsic coercivity over BHmax. It is used in aerospace actuators, downhole drilling tools, and traction motors where thermal margin is paramount and flux requirements are modest.
N35UH Technical Specifications
| Remanence (Br) | 11.7–12.1 kGs (1.17–1.21 T) |
| Coercive Force (HcB) | ≥10.9 kOe (≥867 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥25 kOe (≥1990 kA/m) |
| Energy Product (BHmax) | 33–36 MGOe (263–287 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 N35UH Is Used
N35UH is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
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.
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.
Recommended Coatings for N35UH
Coating choice is driven by operating environment and assembly method. For N35UH, 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 N35UH
- 01High Dy/Tb loading — always pair with GBD processing for economical production.
- 02HcJ of ≥25 kOe gives real margin against partial demagnetization from fault conditions.
- 03Confirm MOFCOM export licensing timeline — UH grades trigger elevated scrutiny.
Related Grades
Frequently Asked Questions
What is N35UH NdFeB magnet?
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N35UH is the entry grade in the UH family, prioritizing maximum intrinsic coercivity over BHmax. It is used in aerospace actuators, downhole drilling tools, and traction motors where thermal margin is paramount and flux requirements are modest.
What is the maximum operating temperature of N35UH?
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N35UH 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 N35UH?
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N35UH delivers an energy product (BHmax) in the range of 33–36 MGOe (263–287 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 N35UH magnets?
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N35UH is typically specified for Aerospace & Defense, EV Motors. The grade's combination of 33–36 MGOe (263–287 kJ/m³) energy product and 180°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N35UH Magnets
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