Technical Data
N45H Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) at 20°C | 13.2–13.7 kGs (1.32–1.37 T) |
| Coercive Force (HcB) at 20°C | ≥12.5 kOe (≥995 kA/m) |
| Intrinsic Coercivity (HcJ) at 20°C | ≥17 kOe (≥1353 kA/m) |
| Energy Product (BHmax) at 20°C | 43–46 MGOe (342–366 kJ/m³) |
| Nominal temperature class | 120°C |
| Approximate coefficient (Br) | -0.12 %/°C |
| Approximate coefficient (HcJ) | -0.55 %/°C |
| Density (typical) | 7.5 g/cm³ |
| Vickers Hardness (typical) | 550–650 HV |
Br, HcB, HcJ and BHmax are educational reference values at 20°C. Supplier specifications vary; agree the quoted material and acceptance limits separately. Temperature coefficients are approximate reference values, not a substitute for measured hot curves. Agree any batch measurements and certificate contents in the order specification.
Overview
What Is N45H?
N45H is a sintered NdFeB grade in the High Temperature (H) family. This reference lists 13.2–13.7 kGs (1.32–1.37 T) remanence and ≥17 kOe (≥1353 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the H designation does not identify alloy composition or establish a safe operating point.
Applications
Related application design topics
These briefs describe design inputs and qualification questions. They do not confirm this grade for a particular application or geometry.
EV Motors
NdFeB magnet design inputs for permanent-magnet traction motors, auxiliary drives and e-axles.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
Robotics
NdFeB design inputs for robot joint motors, compact actuators and servo drives.
Surface Protection
Coating candidates for N45H
Coating choice is driven by operating environment and assembly method. Qualify the finished coating stack for the actual part:
See our NdFeB Coatings Guide for coating definitions and qualification considerations.
Specifying
Design Considerations When Specifying N45H
Key insight
The 120°C class is a preliminary screening value. Check the actual material's hot demagnetization curves against the load line, opposing field and duty cycle.
Compare
Related Grades
Higher nominal temperature class
N45SH (150°C)
Lower nominal temperature class
N45 (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)
N48H · 45–48 MGOe (358–382 kJ/m³)
Same family · High Temperature (H)
N50H · 47–50 MGOe (374–398 kJ/m³)
FAQ
Frequently Asked Questions
What is N45H NdFeB magnet?
+
N45H is a sintered NdFeB grade in the High Temperature (H) family. This reference lists 13.2–13.7 kGs (1.32–1.37 T) remanence and ≥17 kOe (≥1353 kA/m) intrinsic coercivity at 20°C. The numeric grade describes energy product; the H designation does not identify alloy composition or establish a safe operating point.
What is the maximum operating temperature of N45H?
+
N45H has a nominal 120°C class in this reference. Nominal temperature classes do not establish a safe operating temperature. Geometry, hot curves, load line, opposing field and duty cycle must be assessed for the actual part.
What is the BHmax of N45H?
+
N45H has a reference BHmax range of 43–46 MGOe (342–366 kJ/m³) at 20°C. BHmax is the maximum B × H product on the normal demagnetization curve. It does not specify hot output, surface field or pull force. Supplier acceptance values require a material-specific sheet or test record.
What applications use N45H magnets?
+
Related design topics include EV Motors, Industrial Automation, Robotics. These links are educational examples. Grade suitability requires the actual geometry, hot curves, load line, opposing field and duty cycle; the reference properties alone cannot establish it.
Request a drawing review for N45H
Mainrich’s company range is N30 to N56. Grade, series, geometry and temperature must be confirmed together. Share your drawing, quantity and operating conditions for review.