T Cores (Toroidal)
Introduce of T-core, Toroidal Cores, Ring Soft MnZn Ferrite Core Magnets
Toroid cores are the core type geometry of choice for optimizing performance. A toroid of round cross-section offers better performance than one of rectangular cross-section, but for practical and economic reasons, toroid cores of rectangular cross-section are much more prevalent. The symmetry of T cores circular geometry minimizes the amount of external magnetic flux produced. Consequently T cores produce much lower amounts of unwanted electromagnetic interference. Compared against other core types, a toroidal coil has a lot of surface area from which it can dissipate heat hence it cools much better than other core types. Cooler windings result in higher efficiency and may allow more utilization of the core’s capability. Because of its circular nature, the magnetic path of a T-core is an unbroken continuous path unless intentionally broken. There is no air gap in the magnetic path (unless intentionally added) hence optimal use can be made of high permeability materials. Toroids are manufactured in practically all “soft” magnetic materials. Toroid Cores can be coated with insulation like powder coating core and parylene coated core to provide electrical isolation between the core and the winding(s). Some toroid cores are “boxed” to provide isolation, because the core material is sensitive to stresses produced by the winding processes.
Applications of T-core
T cores are widely applied in Power, Current transformer and Telecom field.
T-core used in power: power transformer core, power inductor core, DC-DC Converters, DC converter core, Compact Power Transformer, Small and Low Profile Power Inductors, Wideband transformers, and other inductive delay lines.
T-core used in telecom: xDSL pass-band Filters, Spilters, EMI Inductors, and Filter Inductors with Tight Tolerance.
T-core used in current transformer: EMI-suppression in power lines, EMI-suppression in mains filters.
T core magnetic material drawing
| Type | Dimensions(mm) | ||
|---|---|---|---|
| A | B | C | |
| T4×2×2 | 4.0±0.3 | 2.0±0.3 | 2.0±0.3 |
| T5×3×5 | 5.0±0.3 | 3.0±0.3 | 5.0±0.3 |
| T6×3×4 | 6.0±0.3 | 3.0±0.3 | 4.0±0.3 |
| T6.3×4×4 | 6.3±0.3 | 3.8±0.3 | 4.0±0.3 |
| T7×4×4 | 7.0±0.3 | 4.0±0.3 | 4.0±0.3 |
| T9×5×3 | 9.0±0.3 | 5.0±0.3 | 3.0±0.3 |
| T10×6×5 | 10.0±0.4 | 6.0±0.4 | 5.0±0.3 |
| T10×5×5 | 10.0±0.4 | 5.0±0.4 | 5.0±0.3 |
| T12×6×4 | 12.0±0.4 | 6.0±0.4 | 4.0±0.3 |
| T12.7×7.8×5 | 12.7±0.4 | 7.8±0.3 | 5.0±0.3 |
| T13×7×5 | 13.0±0.5 | 7.0±0.4 | 5.0±0.3 |
| T14×7×5 | 14.0±0.5 | 7.0±0.4 | 5.0±0.3 |
| T16×12×8 | 16.0±0.5 | 12.0±0.4 | 8.0±0.3 |
| T16×9×8 | 16.0±0.5 | 9.0±0.4 | 8.0±0.3 |
| T16×9.5×8 | 16.0±0.5 | 9.5±0.4 | 8.0±0.3 |
| T17×10×8 | 17.5±0.5 | 10.0±0.3 | 8.0±0.3 |
| T18×10×10 | 18.0±0.5 | 10.0±0.4 | 10.0±0.3 |
| T22×14×12 | 22.0±0.6 | 14.0±0.4 | 12.0±0.3 |
| T22×10×10 | 22.0±0.6 | 10.0±0.4 | 10.0±0.3 |
| T22.1×13.7×6.5 | 22.1±0.3 | 13.7±0.3 | 6.5±0.3 |
| T25×15×7 | 25.0±0.6 | 15.0±0.4 | 7.0±0.3 |
| T25×15×10 | 25.0±0.6 | 15.0±0.4 | 10.0±0.3 |
| T27.5×17.5×7 | 27.5±0.6 | 17.5±0.5 | 7.0±0.4 |
| T28×14×11 | 28.0±0.6 | 14.0±0.5 | 11.0±0.4 |
| T30×11×8 | 30.0 +0 -0.8 |
11.0 +0.5 -0 |
8.0±0.4 |
| T31×13×16 | 31.0±0.6 | 13.0±0.5 | 16.0±0.4 |
| T31×19×13 | 31.0±0.6 | 19.0±0.5 | 13.0±0.4 |
| T31×19×6 | 31.0±0.6 | 19.0±0.5 | 6.0±0.3 |
| T68×44×13.5 | 68.0±1.5 | 44.0±1.2 | 13.5±1.0 |
| T31×20×15 | 31.0±0.6 | 20.0±0.5 | 15.0±0.3 |
| T36×23×19 | 36.0±0.6 | 23.0±0.5 | 19.0±0.3 |
| T37×22×15.5 | 37.0±0.5 | 23.0±0.5 | 15.5±0.5 |
| T50×35×20 | 50.0±0.8 | 35.0±0.7 | 20.0±0.5 |
| T38×19×13 | 38.0±0.7 | 19.0±0.6 | 13.0±0.5 |
| T50×25×20 | 50.0±0.8 | 25.0±0.7 | 20.0±0.5 |
| Type | Core parameter | weight (g/pr.) | Al(nH/N²)±25% | |||||
|---|---|---|---|---|---|---|---|---|
| C1 (mm-1) |
Ae (mm2) |
Ie (mm) |
Ve (mm3) |
F3 | F2BD | F2B1 | ||
| T4×2×2 | 4.55 | 1.9 | 8.74 | 16.73 | 0.09 | 820 | 690 | 630 |
| T5×3×5 | 2.55 | 4.9 | 12.0 | 58.93 | 0.3 | 1200 | 1000 | 900 |
| T6×3×4 | 2.35 | 5.8 | 13.1 | 75.33 | 0.37 | 1400 | 1130 | 1030 |
| T6.3×4×4 | 5.05 | 3.1 | 15.2 | 46.53 | 0.26 | 640 | 520 | 470 |
| T7×4×4 | 2.85 | 5.8 | 16.4 | 95.93 | 0.48 | 1120 | 950 | 900 |
| T9×5×3 | 3.05 | 5.8 | 20.8 | 121.1 | 0.7 | 800 | 750 | 620 |
| T10×6×5 | 2.55 | 9.8 | 24.1 | 235.6 | 1.2 | 1300 | 1100 | 950 |
| T10×5×5 | 1.7 | 12.9 | 22.2 | 286.1 | 1.5 | 2000 | 1650 | 1480 |
| T12×6×4 | 2.35 | 11.5 | 26.1 | 301.3 | 1.6 | 2100 | 1400 | 1200 |
| T12.7×7.8×5 | 2.65 | 12.0 | 31.0 | 371.8 | 1.9 | 1400 | 1150 | 1000 |
| T13×7×5 | 2.05 | 14.5 | 29.5 | 428.6 | 2.2 | 1630 | 1430 | 1300 |
| T14×7×5 | 1.85 | 16.8 | 30.5 | 512.7 | 2.6 | 2000 | 1600 | 1400 |
| T16×12×8 | 2.75 | 15.9 | 43.4 | 689.3 | 3.4 | 1270 | 1040 | 950 |
| T16×9×8 | 1.45 | 27.2 | 37.2 | 1012.9 | 5.0 | 2400 | 2000 | 1800 |
| T16×9.5×8 | 1.5 | 25.4 | 38.3 | 973.5 | 5.2 | 2450 | 2000 | 1800 |
| T17×10×8 | 1.55 | 27.4 | 40.5 | 1107.3 | 5.5 | 2380 | 2000 | 1800 |
| T18×10×10 | 1.25 | 38.9 | 41.5 | 1614.9 | 7.9 | 2800 | 2500 | 2100 |
| T22×14×12 | 1.25 | 47.2 | 54.7 | 2879.9 | 13.5 | 2900 | 2450 | 2250 |
| T22×10×10 | 0.88 | 57.0 | 45.4 | 2587.8 | 14 | 3850 | 3400 | 3080 |
| T22.1×13.7×6.5 | 2.0 | 26.8 | 54.1 | 1450.4 | 7.2 | 1780 | 1500 | 1400 |
| T25×15×7 | 1.85 | 34.2 | 60.2 | 2061.1 | 12 | 2000 | 1600 | 1500 |
| T25×15×10 | 0.98 | 63.6 | 60.2 | 3827.8 | 20.5 | 3500 | 3000 | 2800 |
| T27.5×17.5×7 | 2.0 | 34.3 | 68.3 | 2351.4 | 13 | 1800 | 1500 | 1400 |
| T28×14×11 | 0.8 | 74.0 | 61.0 | 4511.3 | 23.5 | 4600 | 3800 | 3500 |
| T30×11 ×8 | 0.8 | 69.9 | 54.7 | 3828.5 | 20.5 | 4600 | 3800 | 3500 |
| T31×13×16 | 0.5 | 135.3 | 61.1 | 8268.4 | 41.5 | 7000 | 6000 | 5500 |
| T31×19×13 | 1.0 | 76.53 | 75.5 | 5771.9 | 29 | 3500 | 3000 | 2900 |
| T31×19×6 | 2.1 | 35.33 | 75.5 | 2663.9 | 15 | 1650 | 3000 | 1200 |
| T68×44×13.5 | 137 | 2700 | ||||||
| T31×20×15 | 1.0 | 81.23 | 77.6 | 6300.7 | 34 | 3500 | 3000 | 2900 |
| T36×23×19 | 0.7 | 121.5 | 89.6 | 10888.1 | 55 | 5000 | 4000 | 3800 |
| T37×22×15.5 | 0.9 | 106.5 | 90.8 | 9667.1 | 48 | 3900 | 4400 | 3100 |
| T50×35×20 | 0.9 | 148.4 | 130.7 | 19402.7 | 98 | 3950 | 3450 | 3150 |
| T38×19×13 | 0.7 | 118.7 | 82.7 | 9820 | 49 | 5000 | 3000 | 2900 |
| T50×25×20 | 0.5 | 240.2 | 108.9 | 26156 | 127 | 7000 | 6000 | 5000 |
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