What Is N45SH?
N45SH is specified across premium EV traction motors, robotics joint actuators, and compact aerospace motors. Its 43+ MGOe energy product at 150°C rating makes it the correct grade for power-dense designs where thermal margin is essential.
N45SH Technical Specifications
| Remanence (Br) | 13.2–13.7 kGs (1.32–1.37 T) |
| Coercive Force (HcB) | ≥12.5 kOe (≥995 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥20 kOe (≥1592 kA/m) |
| Energy Product (BHmax) | 43–46 MGOe (342–366 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 N45SH Is Used
N45SH 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.
Aerospace & Defense
High-temperature NdFeB magnets for aerospace actuators, flight-control servos, defense systems, and downhole tools — with the documentation, export licensing, and material verification these programs demand.
Recommended Coatings for N45SH
Coating choice is driven by operating environment and assembly method. For N45SH, 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 N45SH
- 01Preferred grade for humanoid robot joint motors and high-performance cobot actuators.
- 02Specify minimum HcJ at your working temperature, not just at 20°C.
- 03Lead times can extend during HREE supply disruptions — plan 10–12 week buffer in procurement.
Related Grades
↑ Higher temperature rating
N45UH (180°C)
↓ Lower temperature, lower cost
N45H (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)
N48SH · 45–48 MGOe (358–382 kJ/m³)
Frequently Asked Questions
What is N45SH NdFeB magnet?
+
N45SH is specified across premium EV traction motors, robotics joint actuators, and compact aerospace motors. Its 43+ MGOe energy product at 150°C rating makes it the correct grade for power-dense designs where thermal margin is essential.
What is the maximum operating temperature of N45SH?
+
N45SH 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 N45SH?
+
N45SH delivers an energy product (BHmax) in the range of 43–46 MGOe (342–366 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 N45SH magnets?
+
N45SH is typically specified for EV Motors, Robotics, Aerospace & Defense. The grade's combination of 43–46 MGOe (342–366 kJ/m³) energy product and 150°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N45SH 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.