What Is N50?
N50 is specified where maximum flux in a minimum volume is paramount and the operating temperature is tightly controlled. Typical applications include high-end audio drivers, scientific instruments, particle accelerators, and Halbach arrays for magnetic bearings.
N50 Technical Specifications
| Remanence (Br) | 14.0–14.5 kGs (1.40–1.45 T) |
| Coercive Force (HcB) | ≥11.5 kOe (≥915 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥11 kOe (≥876 kA/m) |
| Energy Product (BHmax) | 47–50 MGOe (374–398 kJ/m³) |
| Max Operating Temperature | 65°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.60 %/°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 N50 Is Used
N50 is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Recommended Coatings for N50
Coating choice is driven by operating environment and assembly method. For N50, the typical options are:
- •NiCuNi
- •Parylene (vacuum/medical)
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Design Considerations When Specifying N50
- 01Max operating temperature drops to 65°C — N50 is not a motor magnet for anything other than short-duty cycle.
- 02Oxidation susceptibility is higher than lower grades — coating integrity is non-negotiable.
- 03Lead time is typically longer as N50 production runs are smaller and less frequent.
Related Grades
Frequently Asked Questions
What is N50 NdFeB magnet?
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N50 is specified where maximum flux in a minimum volume is paramount and the operating temperature is tightly controlled. Typical applications include high-end audio drivers, scientific instruments, particle accelerators, and Halbach arrays for magnetic bearings.
What is the maximum operating temperature of N50?
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N50 sintered NdFeB is rated for continuous operation up to 65°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 N50?
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N50 delivers an energy product (BHmax) in the range of 47–50 MGOe (374–398 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 N50 magnets?
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N50 is typically specified for Medical Devices. The grade's combination of 47–50 MGOe (374–398 kJ/m³) energy product and 65°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N50 Magnets
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