What Is N48SH?
N48SH is the benchmark grade for power-dense permanent-magnet machines operating at elevated temperatures. It is specified in premium EV traction motors, humanoid robot joint actuators, high-performance servo drives, and competition drone motors. GBD-processed N48SH offers this performance at significantly reduced heavy rare earth cost.
N48SH 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) | ≥20 kOe (≥1592 kA/m) |
| Energy Product (BHmax) | 45–48 MGOe (358–382 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 N48SH Is Used
N48SH 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.
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 N48SH
Coating choice is driven by operating environment and assembly method. For N48SH, 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 N48SH
- 01GBD processing is strongly recommended — delivers the same spec with 50–70% less Dy/Tb content.
- 02Qualify multiple suppliers — N48SH production quality varies significantly between factories.
- 03This grade typically justifies 100% flux mapping on incoming inspection for motor applications.
Related Grades
↑ Higher temperature rating
N45UH (180°C)
↓ Lower temperature, lower cost
N48H (120°C)
Same family · Super High Temperature (SH)
N38SH · 36–39 MGOe (287–310 kJ/m³)
Same family · Super High Temperature (SH)
N42SH · 40–43 MGOe (318–342 kJ/m³)
Same family · Super High Temperature (SH)
N45SH · 43–46 MGOe (342–366 kJ/m³)
Frequently Asked Questions
What is N48SH NdFeB magnet?
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N48SH is the benchmark grade for power-dense permanent-magnet machines operating at elevated temperatures. It is specified in premium EV traction motors, humanoid robot joint actuators, high-performance servo drives, and competition drone motors. GBD-processed N48SH offers this performance at significantly reduced heavy rare earth cost.
What is the maximum operating temperature of N48SH?
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N48SH 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 N48SH?
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N48SH 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 N48SH magnets?
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N48SH is typically specified for EV Motors, Robotics. The grade's combination of 45–48 MGOe (358–382 kJ/m³) energy product and 150°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N48SH 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.