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.
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.
Robotics
Radial multi-pole rings, joint-motor magnets, and high-torque servo-motor assemblies for humanoid robots, collaborative robots, and industrial robotic systems.
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, Industrial Automation, Robotics. 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.