What Is N48?
N48 sits close to the upper limit of practical BHmax for standard-series NdFeB. It is used in premium audio transducers, laboratory instruments, and compact BLDC motors where every MGOe directly reduces package size.
N48 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) | ≥11 kOe (≥876 kA/m) |
| Energy Product (BHmax) | 45–48 MGOe (358–382 kJ/m³) |
| Max Operating Temperature | 80°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.
Where N48 Is Used
N48 is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Recommended Coatings for N48
Coating choice is driven by operating environment and assembly method. For N48, the typical options are:
- •NiCuNi
- •Parylene (medical)
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Design Considerations When Specifying N48
- 01HcJ drops to ≥11 kOe at this BHmax level — monitor any demagnetizing field exposure carefully.
- 02Do not operate above 65°C internal temperature without stepping up to N48H or N48SH.
- 03Popular in audio and consumer electronics but frequently over-specified in motors — N48SH with GBD is often the correct motor-grade equivalent.
Related Grades
Frequently Asked Questions
What is N48 NdFeB magnet?
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N48 sits close to the upper limit of practical BHmax for standard-series NdFeB. It is used in premium audio transducers, laboratory instruments, and compact BLDC motors where every MGOe directly reduces package size.
What is the maximum operating temperature of N48?
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N48 sintered NdFeB is rated for continuous operation up to 80°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 N48?
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N48 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 N48 magnets?
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N48 is typically specified for Medical Devices. The grade's combination of 45–48 MGOe (358–382 kJ/m³) energy product and 80°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N48 Magnets
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