What Is N38SH?
N38SH is an entry-level SH grade used where cost is still a priority but the thermal envelope demands more than H-series can provide. Typical in automotive traction auxiliaries and industrial pump motors with elevated ambient conditions.
N38SH Technical Specifications
| Remanence (Br) | 12.2–12.6 kGs (1.22–1.26 T) |
| Coercive Force (HcB) | ≥11.4 kOe (≥907 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥20 kOe (≥1592 kA/m) |
| Energy Product (BHmax) | 36–39 MGOe (287–310 kJ/m³) |
| Max Operating Temperature | 150°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 N38SH Is Used
N38SH 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.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
Recommended Coatings for N38SH
Coating choice is driven by operating environment and assembly method. For N38SH, 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 N38SH
- 01Dy/Tb content is substantial — pricing is sensitive to HREE markets.
- 02Consider whether GBD-processed N42SH would offer better value.
- 03Confirm max continuous temperature including all thermal hot-spots in the motor, not just ambient.
Related Grades
Frequently Asked Questions
What is N38SH NdFeB magnet?
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N38SH is an entry-level SH grade used where cost is still a priority but the thermal envelope demands more than H-series can provide. Typical in automotive traction auxiliaries and industrial pump motors with elevated ambient conditions.
What is the maximum operating temperature of N38SH?
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N38SH sintered NdFeB is rated for continuous operation up to 150°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 N38SH?
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N38SH 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 N38SH magnets?
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N38SH is typically specified for EV Motors, Industrial Automation. The grade's combination of 36–39 MGOe (287–310 kJ/m³) energy product and 150°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N38SH Magnets
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