Kool Mµ MAX Powder Cores
- Technology
- Powder cores
- Partner
- Magnetics Inc.
Kool Mµ MAX is the next generation of Sendust cores from Magnetics. Magnetics supercharged their low core loss Kool Mµ material with 50% better DC bias performance for better power handling. The use of copper wire is minimised by maintaining inductance using fewer turns, resulting in savings in overall component cost. With its super low losses, Kool Mμ MAX does not mimic the temperature rise problems found in iron powder cores and improves inductor efficiency at a fraction of the cost of High Flux with Kool Mµ MAX.

Range features
A high level overview of what this range offers
- Advanced FeSiAl alloy powder material
- Available permeabilities: 14 – 60
- KoolMµ material with improved DC bias behaviour and higher saturation point
- Relatively low core losses – the same as Kool Mµ
- Available in toroids, E cores, and blocks
- Relatively low-cost material – no nickel inside
- Saturation flux density: 1.0T
- Curie temperature: 500°C
- 60µ usable up to 15MHz
What’s in this range?
All the variants in the range and a comparison of what they offer
Model | Size (finished) (OD × ID × HT) | A L (nH/N2) 14 µ | A L (nH/N2) 19 µ | A L (nH/N2) 26µ | A L (nH/N2) 40µ | A L (nH/N2) 60µ | Le (cm) | Ac (cm2) | Vol (cm3) |
---|---|---|---|---|---|---|---|---|---|
050 | 13.5 x 6.99 x 5.51 | – | 9 | 12 | 18 | 27 | 31.2 | 10.9 | 340 |
120 | 17.3 x 9.53 x 7.11 | – | 11 | 15 | 24 | 35 | 41.2 | 19.2 | 791 |
380 | 21.1 x 12.1 x 7.11 | – | 14 | 19 | 28 | 43 | 41.4 | 23.2 | 960 |
206 | 23.6 x 13.3 x 8.4 | – | 10 | 14 | 21 | 32 | 50.9 | 22.1 | 1,120 |
310 | 24.3 x 13.8 x 9.7 | – | 14 | 19 | 29 | 43 | 56.7 | 31.7 | 1,800 |
350 | 27.7 x 14.1 x 11.9 | – | 16 | 22 | 34 | 51 | 58.8 | 38.8 | 2,280 |
930 | 33.7 x 19.5 x 11.4 | 18 | 23 | 32 | 50 | 75 | 63.5 | 65.4 | 4,150 |
548 | 33.7 x 19.5 x 11.4 | 14 | 20 | 28 | 41 | 61 | 81.4 | 65.6 | 5,340 |
585 | 35.2 x 22.6 x 9.8 | 9 | 12 | 16 | 25 | 38 | 89.5 | 46.6 | 4,150 |
324 | 36.7 x 21.5 x 11.4 | 13 | 18 | 24 | 37 | 56 | 89.8 | 67.8 | 6,090 |
254 | 40.8 x 23.3 x 15.4 | 19 | 26 | 35 | 54 | 81 | 98.4 | 107 | 10600 |
454 | 43.83 x 23.4 x 17.26 | – | – | 47 | 72 | 108 | 102 | 147.5 | 15100 |
089 | 47.63 x 27.88 x 16.2 | 20 | 27 | 37 | 57 | 86 | 116 | 134 | 15600 |
438 | 47.63 x 23.3 x 19 | 32 | 43 | 59 | 90 | 135 | 107 | 199 | 21300 |
725 | 51.31 x 23.9 x 21.6 | 41 | 56 | 76 | 117 | 175 | 114 | 262 | 29700 |
715 | 51.69 x 30.93 x 14.4 | 17 | 23 | 32 | 49 | 73 | 127 | 125 | 15900 |
109 | 58.0 x 34.7 x 14.9 | 18 | 24 | 33 | 50 | 75 | 143 | 144 | 20,700 |
195 | 58.0 x 25.6 x 13.2 | 32 | 44 | 60 | 92 | 138 | 125 | 229 | 28,600 |
620 | 62.9 x 31.7 x 25.9 | 44 | 60 | 82 | 126 | 189 | 144 | 360 | 51,800 |
070 | 69.4 x 34.7 x 21.4 | 33 | 48 | 65 | 100 | 143 | 158 | 314 | 49,700 |
778 | 78.9 x 38.3 x 26.8 | 47 | 64 | 88 | 135 | 205 | 177.2 | 492 | 81,500 |
740 | 75.0 x 44.4 x 35.9 | 48 | 64 | 88 | 136 | 204 | 184 | 497 | 91,400 |
866 | 78.9 x 48.2 x 13.9 | 16 | 22 | 30 | 45 | 68 | 196 | 176 | 34,500 |
906 | 78.9 x 48.2 x 17.1 | 20 | 27 | 37 | 57 | 85 | 196 | 221 | 43,400 |
102 | 103.0 x 55.75 x 17.9 | 26 | 35 | 48 | 74 | 111 | 243 | 358 | 86,900 |
337 | 134.0 x 77.19 x 26.8 | 37 | 50 | 68 | – | – | 324 | 678 | 220,000 |
165 | 166.5 x 101.2 x 33.15 | 42 | – | – | – | – | 412 | 987 | 407,000 |