There are currently 27 grades of permanent ferrite magnets commercially available all of which have different ferromagnetic properties. Ferrite magnets, also known as ceramic magnets, are commonly used in electric motors and generators due to their good resistance to demagnetisation – they have high intrinsic coercivity!
Did you know? There are 27 different grades of permanent ferrite magnets commercially available.
The chemical compound of ferrite magnets is SrO-6 (Fe2O3), a combination of strontium carbonate and iron oxide; some grades also include other chemicals such as cobalt and lanthanum to improve magnetic performance
Previously, grades of ferrite magnets where labelled with the letter ‘C’ then a number, for example C1, C2, C3. This system has now been superseded by a similar one with all grades beginning with the letter ‘Y’ followed by a number or a series of numbers and letters. The numbers following the letter define the maximum energy product for the magnet, any letters following the numbers are there to differentiate further between different grades with different characteristics.
The most popular grade of permanent ferrite magnets are Y30, you can buy these right now in block, disc, ring, hook, channel or pot form from the first4magnets.com shop today.
| Material |
|
|
| Intrinsic Coercive Force (Hci) |
|
|
|
| Max Energy Product (BH)max |
|
|
|
|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Y28H-1 |
380-400 |
3.8-4.0 |
240-260 |
v3.02-3.27 |
250-280 |
3.14-3.52 |
27.0-30.0 |
3.4-3.8 |
| Y28H-2 |
360-380 |
3.3-3.8 |
271-295 |
3.41-3.71 |
382-405 |
4.80-5.09 |
26.0-30.0 |
3.3-3.8 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Y32H-2 |
400-440 |
4.0-4.4 |
224-240 |
2.81-3.02 |
230-250 |
2.89-3.14 |
31.0-34.0 |
3.9-4.3 |
| Y33 |
410-430 |
4.1-4.3 |
220-250 |
2.76-3.14 |
225-255 |
2.83-3.20 |
31.5-35.0 |
4.0-4.4 |
| Y33H |
410-430 |
4.1-4.3 |
250-270 |
3.14-3.39 |
250-275 |
3.14-3.46 |
31.5-35.0 |
4.0-4.4 |
| Y34 |
420-440 |
4.2-4.4 |
200-230 |
2.51-2.89 |
205-235 |
2.58-2.95 |
32.5-36.0 |
4.1-4.5 |
| Y35 |
430-450 |
4.3-4.5 |
215-239 |
v2.70-3.00 |
217-241 |
2.73-3.03 |
33.1-38.2 |
4.2-4.8 |
| Y36 |
430-450 |
4.3-4.5 |
247-271 |
3.10-3.41 |
250-274 |
3.14-3.44 |
35.1-38.3 |
4.4-4.8 |
| Y38 |
440-460 |
4.4-4.6 |
285-305 |
3.58-3.83 |
294-310 |
3.69-3.90 |
36.6-40.6 |
4.6-5.1 |
| Y40 |
440-460 |
4.4-4.6 |
330-354 |
4.15-4.45 |
340-360 |
4.27-4.52 |
37.5-41.8 |
4.7-5.3 |
|
How to buy Ferrite Magnets
