Technical Data
N52 Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) | 14.2–14.8 kGs (1.42–1.48 T) |
| Coercive Force (HcB) | ≥11.5 kOe (≥915 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥11 kOe (≥876 kA/m) |
| Energy Product (BHmax) | 48–53 MGOe (382–422 kJ/m³) |
| Max Operating Temperature | 65°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.60 %/°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.
Overview
What Is N52?
N52 is a very high-energy standard grade near the top of the commercial NdFeB range. It exists for applications where magnet volume is the dominant design constraint and operating temperatures are low. Commonly over-specified, many buyers would be better served by a GBD-processed N48SH that offers similar package performance with vastly better thermal margin.
Applications
Where N52 Is Used
N52 is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Medical Devices
Precision NdFeB magnets for MRI equipment, surgical robotics, implantable devices, dental applications, and medical sensors, with the biocompatibility and traceability medical programs require.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
Surface Protection
Recommended Coatings for N52
Coating choice is driven by operating environment and assembly method. For N52, the typical options are:
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Specifying
Design Considerations When Specifying N52
Key insight
65°C maximum operating temperature, this is not a motor magnet.
FAQ
Frequently Asked Questions
What is N52 NdFeB magnet?
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N52 is a very high-energy standard grade near the top of the commercial NdFeB range. It exists for applications where magnet volume is the dominant design constraint and operating temperatures are low. Commonly over-specified, many buyers would be better served by a GBD-processed N48SH that offers similar package performance with vastly better thermal margin.
What is the maximum operating temperature of N52?
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N52 sintered NdFeB is rated for continuous operation up to 65°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 N52?
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N52 delivers an energy product (BHmax) in the range of 48–53 MGOe (382–422 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 N52 magnets?
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N52 is typically specified for Medical Devices, Industrial Automation. The grade's combination of 48–53 MGOe (382–422 kJ/m³) energy product and 65°C maximum service temperature determines its fit for any given motor or actuator design.
Talk to Us About Your N52 Application
Mainrich supplies sintered NdFeB from N30 to N45AH. N52 sits above that range, so we do not quote it. Share your operating point and we will tell you what we can supply for the application, or say plainly that we cannot.