Technical Data
N38EH Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) | 12.2–12.6 kGs (1.22–1.26 T) |
| Coercive Force (HcB) | ≥11.3 kOe (≥899 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥30 kOe (≥2388 kA/m) |
| Energy Product (BHmax) | 36–39 MGOe (287–310 kJ/m³) |
| Max Operating Temperature | 200°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.45 %/°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.
Overview
What Is N38EH?
N38EH is used in downhole drilling motors, high-temperature servo actuators, and specialist industrial drives where 200°C operation is required and a modest improvement in energy product over N35EH is justified.
Applications
Where N38EH Is Used
N38EH is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
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.
Surface Protection
Recommended Coatings for N38EH
Coating choice is driven by operating environment and assembly method. For N38EH, the typical options are:
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Specifying
Design Considerations When Specifying N38EH
Key insight
Confirm compliance with any end-customer restricted-material clauses.
FAQ
Frequently Asked Questions
What is N38EH NdFeB magnet?
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N38EH is used in downhole drilling motors, high-temperature servo actuators, and specialist industrial drives where 200°C operation is required and a modest improvement in energy product over N35EH is justified.
What is the maximum operating temperature of N38EH?
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N38EH sintered NdFeB is rated for continuous operation up to 200°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 N38EH?
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N38EH 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 N38EH magnets?
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N38EH is typically specified for Industrial Automation, EV Motors. The grade's combination of 36–39 MGOe (287–310 kJ/m³) energy product and 200°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N38EH Magnets
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