Interactive Tool
NdFeB Grade Selector
Enter your maximum operating temperature and required BHmax, and we will show the best fits from the 24-grade published reference set — ranked to avoid overspending on thermal margin you do not need. Mainrich supplies sintered NdFeB from N30 to N45AH, confirmed per drawing.
Quick start by application
Recommended Grades
5 matches- 01
N50H
High Temperature (H)Among the highest-BHmax high-temperature NdFeB grades, rare to produce, specify only when justified.
120°C max47–50 MGOe→ - 02
N48H
High Temperature (H)Premium high-temperature NdFeB grade for the most power-dense motors running up to 120°C.
120°C max45–48 MGOe→ - 03
N45H
High Temperature (H)Higher-flux H-series NdFeB grade for compact 120°C motor designs demanding both torque and thermal stability.
120°C max43–46 MGOe→ - 04
N42H
High Temperature (H)Workhorse high-temperature NdFeB grade for automotive motors, pumps, and industrial drives up to 120°C.
120°C max40–43 MGOe→ - 05
N48SH
Super High Temperature (SH)Premium SH-grade NdFeB, the gold-standard magnet for high-performance EV and robotics motor rotors.
150°C max45–48 MGOe→
Standard Grades (Up to 80°C)
9 grades in this family
N35
80°CEntry-level sintered NdFeB grade for cost-sensitive permanent-magnet applications at or below 80°C.
N38
80°CCost-efficient mid-range sintered NdFeB for general permanent-magnet assemblies up to 80°C.
N40
80°CUpper-mid sintered NdFeB grade for compact motor and actuator designs operating at or below 80°C.
N42
80°CHigh-performance sintered NdFeB grade widely used in compact motors, generators, and precision actuators.
N45
80°CHigher-flux sintered NdFeB grade suited to compact, high-torque designs where temperature is controlled.
N48
80°CPremium sintered NdFeB grade for compact, high-energy-density motor and actuator designs.
N50
65°CVery high energy product NdFeB grade for premium audio, Halbach arrays, and research applications.
N52
65°CVery high-energy standard NdFeB near the top of the commercial NdFeB range.
N55
60°CHigh-energy-density sintered NdFeB for space-constrained robotics, premium consumer devices, and compact actuators.
High Temperature (H) — Up to 120°C
5 grades in this family
N38H
120°CHigh-temperature NdFeB grade rated for 120°C operation, with ≥17 kOe intrinsic coercivity.
N42H
120°CWorkhorse high-temperature NdFeB grade for automotive motors, pumps, and industrial drives up to 120°C.
N45H
120°CHigher-flux H-series NdFeB grade for compact 120°C motor designs demanding both torque and thermal stability.
N48H
120°CPremium high-temperature NdFeB grade for the most power-dense motors running up to 120°C.
N50H
120°CAmong the highest-BHmax high-temperature NdFeB grades, rare to produce, specify only when justified.
Super High Temperature (SH) — Up to 150°C
4 grades in this family
N38SH
150°CSuper-high-temperature NdFeB grade rated for 150°C continuous operation.
N42SH
150°CWorkhorse SH-grade NdFeB for 150°C traction motors, robotics actuators, and high-duty servo drives.
N45SH
150°CHigh-flux SH-grade NdFeB for compact, high-torque motors operating continuously up to 150°C.
N48SH
150°CPremium SH-grade NdFeB, the gold-standard magnet for high-performance EV and robotics motor rotors.
Ultra High Temperature (UH) — Up to 180°C
3 grades in this family
N35UH
180°CUltra-high-temperature NdFeB grade rated for 180°C continuous service in traction and extreme-temperature industrial applications.
N42UH
180°CHigh-performance UH-grade NdFeB for the most demanding traction and high-temperature industrial motor applications.
N45UH
180°CTop-tier UH-grade NdFeB, rare production, reserved for the highest-performance traction and extreme-temperature motors.
Extreme High Temperature (EH) — Up to 200°C
3 grades in this family
N35EH
200°CExtreme-temperature NdFeB grade for 200°C continuous service, downhole and extreme-temperature industrial applications.
N38EH
200°CHigher-flux EH-grade NdFeB for the most demanding 200°C applications in energy and extreme-temperature industry.
N42EH
200°CHighest EH grade in this reference set, at the 200°C rating that defines the EH class.
Not sure which grade is right?
Our engineers will review your operating temperature, torque requirements, and packaging constraints, then recommend the correct grade with real safety margin — typically within two business days.
Request Grade Consultation