CommunicationsInductors w/ Toroid Cores
Basic formulas for inductors with toroid cores.
Winding inductors on toroid cores — the turns-to-inductance formula using the core’s AL value.
- µH = (AL * Turns^2) / 1000
- Turns = √((µH * 1000) / AL)
FB Cores
| Core | AL | Tolerance (%) |
|---|
| FB-43-101 | 600.00 | 20 |
| FB-43-2401 | 400.00 | 20 |
| FB-73-2401 | 1600.00 | 20 |
| FB-43-4852 | 2500.00 | 20 |
| FB-43-7351 | 2200.00 | 20 |
| FB-31-1020 | 5700.00 | 20 |
FT Cores
| Core | AL | Tolerance (%) |
|---|
| FT23-43 | 158.00 | 20 |
| FT37-43 | 350.00 | 20 |
| FT37-61 | 55.00 | 20 |
| FT37-67 | 20.00 | 20 |
| FT50-43 | 440.00 | 20 |
| FT50-61 | 69.00 | 20 |
| FT50-75 | 3100.00 | 20 |
| FT50-J | 3100.00 | 20 |
| FT82-43 | 470.00 | 20 |
| FT82-61 | 79.00 | 20 |
| FT114-43 | 510.00 | 20 |
| FT114-61 | 75.00 | 20 |
| FT140-43 | 885.00 | 20 |
| FT140-61 | 150.00 | 20 |
| FT140-77 | 2200.00 | 20 |
| FT240-31 | 3180.00 | 20 |
| FT240-43 | 1075.00 | 20 |
| FT240-52 | 330.00 | 20 |
| FT240-K | 330.00 | 20 |
| FT240-61 | 170.00 | 20 |
| FT290-43 | 1275.00 | 20 |
T Cores
| Core | AL | Tolerance (%) |
|---|
| T25-2 | 3.40 | 5 |
| T25-6 | 2.70 | 5 |
| T30-2 | 4.30 | 5 |
| T30-6 | 3.60 | 5 |
| T30-10 | 2.50 | 5 |
| T37-0 | 0.49 | 5 |
| T37-1 | 8.00 | 10 |
| T37-2 | 4.00 | 5 |
| T37-6 | 3.00 | 5 |
| T37-7 | 3.20 | 5 |
| T37-10 | 2.50 | 5 |
| T37-17 | 1.50 | 5 |
| T44-2 | 5.20 | 5 |
| T44-6 | 4.20 | 5 |
| T50-1 | 10.00 | 10 |
| T50-2 | 4.90 | 5 |
| T50-3 | 17.50 | 5 |
| T50-6 | 4.00 | 5 |
| T50-7 | 4.30 | 5 |
| T50-10 | 3.10 | 5 |
| T50-17 | 1.80 | 5 |
| T68-1 | 11.50 | 10 |
| T68-2 | 5.70 | 5 |
| T68-6 | 4.70 | 5 |
| T68-7 | 5.20 | 5 |
| T68-10 | 3.20 | 5 |
| T80-2 | 5.50 | 5 |
| T80-6 | 4.50 | 5 |
| T80-10 | 3.20 | 5 |
| T80-17 | 2.20 | 5 |
| T94-2 | 8.40 | 5 |
| T94-6 | 7.00 | 5 |
| T94-10 | 5.80 | 5 |
| T106-0 | 1.90 | 5 |
| T106-2 | 13.50 | 5 |
| T106-6 | 11.60 | 5 |
| T130-0 | 1.50 | 5 |
| T130-1 | 20.00 | 10 |
| T130-2 | 11.00 | 5 |
| T130-6 | 9.60 | 5 |
| T130-17 | 4.00 | 5 |
| T157-2 | 14.00 | 5 |
| T157-17 | 5.30 | 5 |
| T184-17 | 8.70 | 5 |
| T200-2 | 12.00 | 5 |
| T200-2B | 21.80 | 5 |
| T200-6 | 10.40 | 5 |
| T225-2B | 21.50 | 5 |
