What Is N38?
N38 balances BHmax and cost more favourably than N35 and is a common default when a specifier does not have a strong reason to reach for a higher grade. It suits loudspeakers, sensors, small DC motors, and general industrial fixtures where the operating temperature is controlled.
N38 Technical Specifications
| Remanence (Br) | 12.2–12.6 kGs (1.22–1.26 T) |
| Coercive Force (HcB) | ≥11.3 kOe (≥899 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥12 kOe (≥955 kA/m) |
| Energy Product (BHmax) | 36–39 MGOe (287–310 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 N38 Is Used
N38 is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Recommended Coatings for N38
Coating choice is driven by operating environment and assembly method. For N38, the typical options are:
- •NiCuNi
- •Epoxy over NiCuNi
- •Zinc
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Design Considerations When Specifying N38
- 01Default grade for price-driven assemblies — step up to N42 when an extra 10% flux is worth the premium.
- 02Heat-sensitive applications should use N38H or N38SH to avoid demagnetization headroom concerns.
- 03Confirm ambient and internal motor temperatures at full load before committing to standard-series N38.
Related Grades
Frequently Asked Questions
What is N38 NdFeB magnet?
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N38 balances BHmax and cost more favourably than N35 and is a common default when a specifier does not have a strong reason to reach for a higher grade. It suits loudspeakers, sensors, small DC motors, and general industrial fixtures where the operating temperature is controlled.
What is the maximum operating temperature of N38?
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N38 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 N38?
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N38 delivers an energy product (BHmax) in the range of 36–39 MGOe (287–310 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 N38 magnets?
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N38 is typically specified for Industrial Automation. The grade's combination of 36–39 MGOe (287–310 kJ/m³) energy product and 80°C maximum service temperature determines its fit for any given motor or actuator design.
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