What Is N48H?
N48H is used in EV traction auxiliaries, premium servo motors, and power tools where maximum flux is required at high temperatures. It is a common choice for 48V BLDC systems and compact EPS motors.
N48H Technical Specifications
| Remanence (Br) | 13.7–14.1 kGs (1.37–1.41 T) |
| Coercive Force (HcB) | ≥12.5 kOe (≥995 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥17 kOe (≥1353 kA/m) |
| Energy Product (BHmax) | 45–48 MGOe (358–382 kJ/m³) |
| Max Operating Temperature | 120°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.55 %/°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 N48H Is Used
N48H is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Recommended Coatings for N48H
Coating choice is driven by operating environment and assembly method. For N48H, 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 N48H
- 01The step from N45H to N48H offers ~6% flux gain for a ~10–15% cost increase — verify the motor design benefits before committing.
- 02HcJ of ≥17 kOe gives limited margin for stalled-rotor or short-circuit faults — add safety factor in FEM analysis.
- 03Qualify at least two suppliers — N48H requires tighter process control than lower grades.
Related Grades
↑ Higher temperature rating
N48SH (150°C)
↓ Lower temperature, lower cost
N48 (80°C)
Same family · High Temperature (H)
N38H · 36–39 MGOe (287–310 kJ/m³)
Same family · High Temperature (H)
N42H · 40–43 MGOe (318–342 kJ/m³)
Same family · High Temperature (H)
N45H · 43–46 MGOe (342–366 kJ/m³)
Same family · High Temperature (H)
N50H · 47–50 MGOe (374–398 kJ/m³)
Frequently Asked Questions
What is N48H NdFeB magnet?
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N48H is used in EV traction auxiliaries, premium servo motors, and power tools where maximum flux is required at high temperatures. It is a common choice for 48V BLDC systems and compact EPS motors.
What is the maximum operating temperature of N48H?
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N48H sintered NdFeB is rated for continuous operation up to 120°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 N48H?
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N48H delivers an energy product (BHmax) in the range of 45–48 MGOe (358–382 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 N48H magnets?
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N48H is typically specified for EV Motors. The grade's combination of 45–48 MGOe (358–382 kJ/m³) energy product and 120°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N48H Magnets
Factory-direct supply from Mainrich International. IATF 16949 certified, EU-office support from London, 97% on-time delivery. Share your dimensions, quantity, and target application — we will quote within two business days.