Part geometry
Share arc dimensions, mating surfaces and the available space.
Ferrite Magnets
Ceramic magnets for motors and industrial components. Match the geometry, magnetic direction and test fixture to the application.
Application review notes
For many motors and industrial components, the right answer is a well-engineered ferrite magnet. We review magnetic output, available space, geometry and process tolerances to develop a practical route for repeat production.
START WITH YOUR REQUIREMENTS
Magnetic direction
Define the pole orientation, air gap and magnetic output needed.
Production review
Identify tooling, tolerances and the test fixture for acceptance.
FORMS & CONFIGURATIONS
Ceramic Forms for Your Magnetic Circuit.
Representative product forms. Final geometry, dimensions and material are confirmed against your drawing.
Arc segments
Curved magnet segments. Final geometry is confirmed against the drawing.
View Configuration Guide
Rings
Ring geometry for speakers and sensors
Review This Form
Blocks
Block geometry for holders and separators
Review This Form
Discs
Round geometry for general industrial use
Review This FormDESIGN & SELECTION
Specify the Part and Its Magnetic Direction.
- Geometry
Radius, arc angle, wall and axial length
- Magnetic direction
Preferred orientation and pole pattern
- Acceptance
Ground faces, dimensional limits and edge condition
A good fit when
- High-volume motors, speakers and sensors
- Outdoor or humid applications where ceramic corrosion resistance simplifies protection
- Designs with enough package volume for a larger magnet
- Programs prioritizing stable supply economics and no metallic coating
Check before release
- Ferrite needs more volume than rare-earth material for the same magnetic output
- The ceramic body is hard and brittle; impact, chips and assembly stress require attention
- Magnetizing fixtures and pole pitch can limit achievable performance in small or complex parts
- Confirm temperature coefficient, mechanical retention and adhesive compatibility at the assembly level
ENGINEERING REVIEW
Match the Ferrite Arc to Your Motor.
Resolve the available envelope, air gap and ceramic retention before finalizing geometry and tooling.
Available envelope
Share the maximum diameter, arc length, radial thickness and air gap. Ferrite selection often succeeds or fails on available magnetic-circuit volume.
Magnetic target
Provide pull force, flux density, torque or speaker sensitivity target together with the test fixture and measurement position.
Mechanical retention
Describe the housing, adhesive, press fit, shock, vibration and edge-clearance requirements for the ceramic part.
Volume and tooling
State annual demand, launch quantity and expected design life. Tooling and cavity decisions should be evaluated with the forecast.
MATERIAL REFERENCE
Technical Data, Clearly Presented.
Complete technical grade data20 reference rows
20 rows
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Units and Notes
Notation: Br is remanent flux density; HcB (Hcb/bHc) is normal coercivity; HcJ (Hcj/Hci/iHc) is intrinsic coercivity. Grade identifiers retain their source naming. Historical aliases do not establish identical supply specifications.
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| Grade | Br mT (kG) | Hcb kA/m (kOe) | Hcj kA/m (kOe) | (BH)max kJ/m³ (MGOe) | |
|---|---|---|---|---|---|
| Y8T | 200-235 (2.0-2.35) | 125-160 (1.57-2.01) | 210-280 (2.64-3.52) | 6.5-9.5 (0.8-1.2) | Material Datasheet |
| Y10T | 200-235 (2.0-2.35) | 128-160 (1.61-2.01) | 210-280 (2.64-3.52) | 6.4-9.6 (0.8-1.2) | Material Datasheet |
| Y20 | 320-380 (3.2-3.8) | 135-190 (1.70-2.39) | 140-195 (1.76-2.45) | 18.0-22.0 (2.3-2.8) | Material Datasheet |
| Y22H | 310-360 (3.1-3.6) | 220-250 (2.76-3.14) | 280-320 (3.52-4.02) | 20.0-24.0 (2.5-3.0) | Material Datasheet |
| Y23 | 320-370 (3.2-3.7) | 170-190 (2.14-2.39) | 190-230 (2.39-2.89) | 20.0-25.5 (2.5-3.2) | Material Datasheet |
| Y25 | 360-400 (3.6-4.0) | 135-170 (1.70-2.14) | 140-200 (1.76-2.51) | 22.5-28.0 (2.8-3.5) | Material Datasheet |
| Y26H | 360-390 (3.6-3.9) | 220-250 (2.76-3.14) | 225-255 (2.83-3.20) | 23.0-28.0 (2.9-3.5) | Material Datasheet |
| Y26H-1 | 360-390 (3.6-3.9) | 200-250 (2.51-3.14) | 225-255 (2.83-3.20) | 23.0-28.0 (2.9-3.5) | Material Datasheet |
| Y26H-2 | 360-380 (3.6-3.8) | 263-288 (3.30-3.62) | 318-350 (4.00-4.40) | 24.0-28.0 (3.0-3.5) | Material Datasheet |
| Y27H | 370-400 (3.7-4.0) | 205-250 (2.58-3.14) | 210-255 (2.64-3.20) | 25.0-29.0 (3.1-3.6) | Material Datasheet |
| Y28 | 370-400 (3.7-4.0) | 175-210 (2.20-2.64) | 180-220 (2.26-2.76) | 26.0-30.0 (3.3-3.8) | Material Datasheet |
| Y28H-1 | 380-400 (3.8-4.0) | 240-260 (3.02-3.27) | 250-280 (3.14-3.52) | 27.0-30.0 (3.4-3.8) | Material Datasheet |
| Y28H-2 | 360-380 (3.6-3.8) | 271-295 (3.41-3.71) | 382-405 (4.80-5.09) | 26.0-30.0 (3.3-3.8) | Material Datasheet |
| Y30 | 370-400 (3.7-4.0) | 175-210 (2.20-2.64) | 180-220 (2.26-2.76) | 26.0-30.0 (3.3-3.8) | Material Datasheet |
| Y30BH | 380-390 (3.8-3.9) | 223-235 (2.80-2.95) | 231-245 (2.90-3.08) | 27.0-30.0 (3.4-3.8) | Material Datasheet |
| Y30H-1 | 380-400 (3.8-4.0) | 230-275 (2.89-3.46) | 235-290 (2.95-3.64) | 27.0-32.0 (3.4-4.0) | Material Datasheet |
| Y30H-2 | 395-415 (3.95-4.15) | 275-300 (3.46-3.77) | 310-335 (3.90-4.21) | 27.0-32.5 (3.4-4.1) | Material Datasheet |
| Y32 | 400-420 (4.0-4.2) | 160-190 (2.01-2.39) | 165-195 (2.07-2.45) | 30.0-33.5 (3.8-4.2) | Material Datasheet |
| Y32H-1 | 400-420 (4.0-4.2) | 190-230 (2.39-2.89) | 230-250 (2.89-3.14) | 31.5-35.0 (4.0-4.4) | Material Datasheet |
| Y40 | 440-460 (4.4-4.6) | Project-specific | Project-specific | ~38-42 (~4.8-5.3) | Material Datasheet |
Reference values support initial selection; the approved drawing and agreed specification govern supply.
Grade PDF links open a dedicated grade file. Material Datasheet links open the general material reference.
Reference edition 2026.09-R1 · Magnetic quantities and conversion tools
Application & grade guidance5 reference rows
5 rows
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| Application | Typical Spec | Why this material |
|---|---|---|
| DC / appliance motors | Y30 / Y30BH | Low cost and robust high-volume performance |
| Loudspeakers | Y25 / Y30 | Large magnet volume at economical cost |
| Magnetic separators | Y40 anisotropic | Higher ferrite energy for large field structures |
| Automotive sensing / small motors | Y30BH | Temperature-stable and corrosion-resistant |
| Consumer / crafts | Y10T isotropic | Low-cost geometry with flexible magnetization direction |
Isotropic vs anisotropic ferrite3 reference rows
3 rows
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| Type | Orientation | Relative performance | Magnetization flexibility | Best fit |
|---|---|---|---|---|
| Isotropic | No preferred particle orientation | Lower | Can be magnetized in multiple directions | Cost-critical, multipole, consumer applications |
| Anisotropic | Particles aligned during pressing | Higher | Preferred direction fixed by manufacturing | Motors, speakers, separators |
| Wet-pressed anisotropic | Field-oriented slurry pressing | Highest mainstream ferrite performance | Preferred direction fixed | Higher-performance motor segments / rings |
Physical properties6 reference rows
6 rows
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| Characteristic | Symbol / Unit | Reference Value |
|---|---|---|
| Density | g/cm³ | 4.9–5.1 |
| Vickers hardness | Hv | 400–700 |
| Compression strength | N/mm² | 680–720 |
| Specific heat capacity | J/kg·°C | 795–855 |
| Electrical resistivity | μΩ·cm | ~1 × 10¹⁰ |
| Curie temperature | °C | ~450 |
QUALITY & RELEASE
Verify the Ferrite Magnet in Its Test Fixture.
Verification follows the component’s function and the agreed inspection plan.
Magnetic output
Review details
Agree on the property and fixture used for acceptance. For motor arcs, include pole orientation, matching and air-gap conditions.
Geometry and chips
Review details
Set critical dimensions, arc angle, flatness, edge condition and visual limits for chips or cracks.
Assembly retention
Review details
Validate adhesive or mechanical retention under the actual vibration, temperature and shock profile.
Batch consistency
Review details
Track material grade, cavity or tool identification, magnetizing setup and sampling plan across production lots.
PRODUCT QUESTIONS
Ferrite Geometry and Tooling.
Why is ferrite often larger than NdFeB?
Ferrite has a lower maximum energy product, so the magnetic circuit may need more volume to reach the same air-gap performance. The final trade-off depends on geometry and system design.
Does ferrite need a coating?
Ferrite is a ceramic material and is generally corrosion resistant without a metallic coating. The housing, adhesive and exposed surface still need to be reviewed for the actual environment.
Is ferrite suitable for motor arcs?
Yes. Ferrite arcs are widely used in cost-sensitive motor designs when the available volume and required torque or speed are compatible with the material's magnetic performance.
CONTINUE EXPLORING
Related Magnetic Solutions.
APPLICATION REVIEW
Review Your Ferrite Geometry.
Send the arc or part drawing, air gap and production volume.
Discuss This Specification