What Is N35?
N35 is the lowest-energy-product sintered NdFeB grade in common commercial production. It is chosen where budget outweighs absolute flux density and the working temperature stays at or below 80°C — typical applications include holding magnets, sensors, speakers, and general-purpose DC motors.
N35 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) | ≥12 kOe (≥955 kA/m) |
| Energy Product (BHmax) | 33–36 MGOe (263–287 kJ/m³) |
| Max Operating Temperature | 80°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 N35 Is Used
N35 is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Recommended Coatings for N35
Coating choice is driven by operating environment and assembly method. For N35, the typical options are:
- •NiCuNi
- •Zinc (budget)
- •Epoxy (outdoor)
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Design Considerations When Specifying N35
- 01Lowest BHmax means larger magnets are needed for equivalent flux — check package dimensions before specifying N35 over a higher grade.
- 02Do not use above 80°C operating temperature — thermal demagnetization begins well before material failure.
- 03Zinc coating is acceptable for dry indoor use but epoxy-over-NiCuNi is worth the small premium for any humid environment.
Related Grades
Frequently Asked Questions
What is N35 NdFeB magnet?
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N35 is the lowest-energy-product sintered NdFeB grade in common commercial production. It is chosen where budget outweighs absolute flux density and the working temperature stays at or below 80°C — typical applications include holding magnets, sensors, speakers, and general-purpose DC motors.
What is the maximum operating temperature of N35?
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N35 sintered NdFeB is rated for continuous operation up to 80°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 N35?
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N35 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 N35 magnets?
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N35 is typically specified for Industrial Automation. The grade's combination of 33–36 MGOe (263–287 kJ/m³) energy product and 80°C maximum service temperature determines its fit for any given motor or actuator design.
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