Toroidal Core

Toroidal core are traditional round-shaped powder cores which formed by distributing air gap in ferrous alloy powders for low losses at high frequencies. Small air gaps distributed evenly throughout the cores increase the amount of Direct Current (DC) that can be passed through the winding before core saturation. This is the most popular type cores and widely apply in electronic power supply industry. There are different core sizes from 9.6mm (OD) to 165mm (OD), while permeability from 19um~173um according to types.

  • Major Types: MPP Cores : Ni-Fe-Mo alloy
    High Flux Cores : Fe-Ni alloy
    Sendust Cores : Fe-Si-Al alloy
    Mega Flux Cores : Fe-Si alloy
    HS Cores: : HF-HP alloy
    HP Cores: : Fe-Si-Al alloy
MPP Cores
  • Characteristics: Ni-Fe-Mo alloy
    Low core los and high permeability
    Excellent temperature and inductance stability
    under high DCB conditions.
    Variety of sizes and permeability.
  • Applications: DC output inductors, High Q filter, Loading coils, EMI/RFI filter, aircraft industry.
                         
Part No Nominal Inductance(nH/N²) Path Length (cm) Cross Section Area (cm²) Dimensions(mm)
Before Finish Dimensions After Finish Dimensions
OD(mm) ID(mm) HT(mm) OD(mm) ID(mm) HT(mm)
26 60 125 147 160 173 MAX MIN MAX MAX MIN MAX
CM096 11 25 53 63 68 74 2.18 0.0752 9.65 4.78 3.18 10.29 4.27 3.81
CM097 14 32 66 78 84 92 2.18 0.0945 9.65 4.78 3.96 10.29 4.27 4.57
CM102 14 32 66 78 84 92 2.38 0.1 10.16 5.08 3.96 10.8 4.57 4.57
CM112 11 26 53 63 68 74 2.69 0.0906 11.18 6.35 3.96 11.9 5.89 4.72
CM127 12 27 56 67 72 79 3.12 0.114 12.7 7.62 4.75 13.46 6.99 5.51
CM166 15 35 72 88 92 104 4.11 0.192 16.51 10.16 6.35 17.4 9.53 7.11
CM172 19 43 89 105 114 123 4.14 0.232 17.27 9.65 6.35 18.03 9.02 7.11
CM203 14 32 68 81 87 96 5.09 0.226 20.32 12.7 6.35 21.1 12.07 7.11
CM229 19 43 90 106 115 124 5.67 0.331 22.86 13.97 7.62 23.62 13.39 8.38
CM234 22 51 105 124 135 146 5.88 0.388 23.57 14.4 8.89 24.3 13.77 9.7
CM270 32 75 157 185 201 217 6.35 0.654 26.92 14.73 11.18 27.7 14.1 11.99
CM330 28 61 127 150 163 176 8.15 0.672 33.02 19.94 10.67 33.83 19.3 11.61
CM343 16 38 79 93 101 109 8.95 0.454 34.29 23.37 8.89 35.2 22.6 9.83
CM358 24 56 117 138 150 162 8.98 0.678 35.81 22.35 10.46 36.7 21.5 11.28
CM400 35 81 168 198 215 233 9.84 1.072 39.88 24.13 14.48 40.7 23.3 15.37
CM467 59 135 281 33 360 10.74 1.99 46.74 24.13 18.03 47.6 23.3 18.92
CM468 37 86 178 210 228   11.63 1.34 46.74 28.7 15.24 47.6 27.9 16.13
CM508 32 73 152 179 195   12.73 1.25 50.8 31.75 13.46 51.7 30.9 14.35
CM571 60 138 287 306 333   12.5 2.29 57.15 26.39 15.24 58 25.6 16.1
CM572 33 75 156 185 200   14.3 1.444 57.15 35.56 13.97 58 34.7 14.86
CM610   192 400       14.37 3.675 62 32.6 25 63.1 31.37 26.27
CM740 206 429     18.38 5.04 74.1 45.3 35 75.2 44.07 36.27
CM777 30 68 142     20 1.77 77.8 49.23 12.7 78.9 48 13.97
CM778 37 85 178     20 2.27 77.8 49.23 15.9 78.9 48 17.02
CM1013 40 92 192     24.27 2.97 101.6 57.2 13.6 103.1 55.7 14.9
CM1016 47 112 228     24.27 3.52 101.6 57.2 16.5 103.1 55.7 17.8
CM1027 80 184 384     24.27 5.94 101.6 57.2 27.2 103.1 55.7 28.5
CM1033 94 224 456     24.27 7.04 101.6 57.2 33 103.1 55.7 34.3
CM1320     32.42 5.35 132.5 78.6 20.3 134.2 77 21.7
CM1325 68 156 325     32.42 6.71 132.5 78.6 25.4 134.2 77 26.8
CM1333 88 202 422     32.42 8.72 132.5 78.6 33 134.2 77 34.4
CM1340 108 248 518     32.42 10.69 132.5 78.6 40.6 134.2 77 42
CM1625 80 184 384     38.65 9.46 165 88.9 25.4 167.2 86.9 27.3