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Kool Mµ® MAX Cores

HIgh DC Bias for Better Power Handling


Kool Mµ MAX is the next generation of sendust cores from Magnetics. We supercharged our low core loss Kool Mµ material with 50% better DC bias performance for better power handling. Use of copper wire is minimized by maintaining inductance using less 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. Improve inductor efficiency at a fraction of the cost of High Flux with Kool Mµ MAX.

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Key Characteristics

  • Composition: Al • Si • Fe
  • Shapes: Toroid, E, U, Block, EQ, LP, EER, Cylinder
  • Sizes: 13.5 mm to 165 mm
  • Permeability: 14µ, 19µ, 26µ, 40µ, 60µ, 75µ, 90µ
  • Coating Color: Black

Property Curves

View Kool Mµ MAX Material Property Curves including Normal Magnetization curves, Core Loss Density curves, Permeability versus Temperature curves, Permeability versus DC Bias curves, and Permeability versus Frequency curves.

For more information on Magnetics' Kool Mµ MAX toroids, view our technical bulletin.

Kool Mµ MAX Part Number Identification

How To Order: Magnetics Powder Cores

Core Data AL nH/T2 (nominal) Le Path Length
mm		 Ae Cross Section
mm2		 Ve Volume
mm3		 OD max
mm		 ID min
mm		 HT max
mm
14µ 19µ 26µ 40µ 60µ 75µ 90µ
050 6 9 12 18 27 34 40 31.2 10.9 340 13.46 6.99 5.51
120 8 11 15 24 35 43 52 41.2 19.2 791 17.27 9.52 7.11
380 10 14 19 28 43 53 64 41.4 23.2 960 18.03 9.02 7.11
206 7 10 14 21 32 41 49 50.9 22.1 1,120 21.08 12.07 7.11
310 9 14 19 29 43 54 65 56.7 31.7 1,800 23.62 13.34 8.38
350 12 16 22 34 51 63 76 58.8 38.8 2,280 24.33 13.77 9.65
930 18 23 32 50 75 94 113 63.5 65.4 4,150 27.69 14.10 11.94
426     30   69     66.5 72.7 4,840 30.00 17.40 10.90
548 14 20 28 41 61 76 91 81.4 65.6 5,340 33.66 19.46 11.43
585 9 12 16 25 38 47 57 89.5 46.6 4,150 35.18 22.56 9.78
324 13 18 24 37 56 70 84 89.8 67.8 6,090 36.70 21.54 11.35
395 28 39 53 81 122     95.1 153.7 14,617 40.94 21.27 17.89
254 19 26 35 54 81 101 121 98.4 107 10,600 40.77 23.32 15.37
454 25 34 47 72 108     102 147.5 15,100 43.84 23.39 17.27
089 20 27 37 57 86     116 134 15,600 47.63 27.89 16.13
438 32 43 59 90 135     107 199 21,300 47.63 23.32 18.92
725 41 56 76 117 175     114 262 29,700 51.51 24.00 21.59
715 17 23 32 49 73     127 125 15,900 51.69 30.94 14.34
540 24 33 45 69 104     126 174 22,000 54.90 28.10 15.30
109 18 24 33 50 75     143 144 20,700 58.04 34.75 14.86
195 32 44 60 92 138     125 229 28,600 58.04 25.58 16.13
596 29 39 54 83 125     143 237 33,900 60.60 33.00 20.50
620 44 60 82 126 189     144 360 51,800 63.09 31.70 25.91
070 33 48 65 100 143     158 314 49,700 69.42 34.67 21.41
778 47 64 88 135 205     177.2 492 81,500 78.94 38.33 26.85
740 48 64 88 136 204     184 497 91,400 75.21 44.40 35.92
866 16 22 30 45 68     196 176 34,500 78.94 48.21 13.84
906 20 27 37 57 85     196 221 43,400 78.94 48.21 17.02
102 26 35 48 74 111     243 358 86,900 103.00 55.75 17.91
337 37 50 68         324 678 220,000 133.96 77.19 26.80
165 42             412 987 407,000 166.50 101.02 33.15
Core Data AL nH/T2 (nominal) Le Path Length
mm		 Ae Cross Section
mm2		 Ve Volume
mm3		 Length max
mm		 Leg Length min
mm		 Height max
mm
26µ 40µ 60µ
1808 26 35 48 40.1 22.8 914 19.3 8.1 4.8
2510 39 52 70 48.5 38.5 1,870 25.4 9.5 6.35
3007 33 46 71 65.6 60.1 3,940 30.1 15 7.1
3515 56 75 102 69.4 84 5,830 34.54 14.15 9.35
4017 56 76 105 98.4 128 12,600 42.85 21.1 10.8
4020 80 108 150 98.4 183 18,007 43.5 20.8 15.7
4022 104 140 194 98.4 237 23,321 43.5 20.8 20.3
4317 88 119 163 77.5 152 11,800 41.5 16.2 12.7
5528 116 157 219 123 350 43,100 55.7 27.2 21.0
5530 138 187 261 123 417 51,400 55.7 27.2 25.0
6527 162 230 300 147 540 79,400 66.4 32.1 27.4
7228 130 173 235 137 368 50,400 73.5 27.4 19.4
8020 103 145 190 185 389 72,000 81.2 37.5 20.2
8024 200 275 370 131.4 600 78,840 80 24.1 29.7
8044 91 113 170 208 389 80,900 81.2 44.0 20.2
114LE 182 335 445 215 1,220 262,000 114.3 46.2 34.9
130LE 254     219 1,080 237,000 130.3 32.5 53.85
160LE 180     273 778 212,000 160 38.1 39.6
Block
Core Data		 AL nH/T2 (nominal) Ve Volume
mm3		 Length
mm		 Width
mm		 Height
mm
26µ 40µ 60µ
4741 PDF PDF PDF 53,600 47.5 41.0 27.5
5030 PDF PDF PDF 23,000 50.5 30.3 15.0
5528 PDF PDF PDF 31,200 54.9 27.6 20.6
6030 PDF PDF PDF 27,000 60.0 30.0 15.0
6131 PDF PDF PDF 36,700 60.5 30.3 20.0
7020 PDF PDF PDF 28,600 70.5 20.3 20.0
7030 PDF PDF PDF 42,800 70.5 30.3 20.0
8020 PDF PDF PDF 32,700 80.5 20.3 20.0
8030 PDF PDF PDF 48,800 80.5 30.3 20.0
9541 PDF PDF PDF 107,200 95.0 41.0 27.5
Core Data AL nH/T2 (nominal) Le Path Length
mm		 Ae Cross Section
mm2		 Length
mm		 Height
mm		 Width
mm
26µ 40µ 60µ 75µ
EQ20 L050 81 120 167 203 29.3 60.8 20.0 5.0 14.0
EQ20 L061 67 98 138 168 35.8 60.8 20.0 6.1 14.0
EQ26 L070 111       42.3 119.8 26.5 7.0 19.0
EQ26 L088 95       49.5 119.8 26.5 8.8 19.0
EQ26 L101 86       54.7 119.8 26.5 10.1 19.0
EQ26 L124 74       63.9 119.8 26.5 12.4 19.0
EQ32 L101 100       59.5 152.3 32.0 10.1 22.0
EQ32 L152 75   156   79.9 152.3 32.0 15.2 22.0
EQ32 L180 66       91.1 152.3 32.0 18.0 22.0
EQ36 L100 109 160 223 272 65.1 180.8 36.0 10.0 26.0
EQ36 L110 102 151 211 256 69.1 180.8 36.0 11.0 26.0
EQ36 L174 75 110 154 187 94.7 180.8 36.0 17.4 26.0
EQ41 L120 94 138 193 234 83.6 199.7 41.5 12.0 28.0
EQ41 L199 68 100 140 163 115.2 199.7 41.5 19.9 28.0
EQ50 L200 109 160 223 271 113.4 314.1 50.0 20.0 32.0
EQ50 L250 92 136 190 231 133.4 314.1 50.0 25.0 32.0
Core Data AL nH/T2 (nominal) Le Path Length
mm		 Ae Cross Section
mm2		 Length
mm		 Height
mm		 Width
mm
26µ 40µ 60µ 75µ
LP23 L087 54 79 110 134 49.1 67.0 23.4 8.7 14.0
LP25 L099 68       55.7 96.0 25.0 9.9 18.0
LP30 L118 65       68.0 114.0 30.0 11.8 20.0
LP32 L152 69       82.1 143.0 32.0 15.2 22.0
LP36 L144 86 127 177   80.6 177.0 36.2 14.4 24.0
LP42 L107 116 171 239 290 69.7 206.0 42.0 10.7 25.0
LP42 L123 106 156 218 265 76.1 206.0 42.0 12.3 25.0
LP42 L158 90 132 184 224 90.1 206.0 42.0 15.8 25.0