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Tomita EFC, EFD ferrite core
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EFD Type Ferrite Core is widely used in transformers with small size and high power, such as precision instruments, module power supplies, computer terminal outputs, etc.
- Product Name: EFC, EFD ferrite core
- Brand: Tomita
- Product Details
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EFD Type Ferrite Core has the advantages of low thermal resistance, low attenuation, high power, and wide operating frequency. The finished product is light in weight, reasonable in structure, and easy for surface mounting.
EFD Type Ferrite Core is widely used in transformers with small size and high power, such as precision instruments, module power supplies, computer terminal outputs, etc.
| Cores | Dimensions(mm) | Weight (g) | Fig. | Specification | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C1 | C2 | D | E | F | ||||
| EFD-12 | 12.5±0.3 | 12.4±0.3 | 3.50±0.1 | 2.0±0.1 | 9.0±0.25 | 5.4±0.15 | 9.1±0.3 | 1.6 | 1 | |
| EFD-15 | 15.0±0.4 | 15.0±0.3 | 4.65±0.15 | 2.4±0.1 | 11.0±0.35 | 5.3±0.15 | 11.0±0.4 | 2.8 | 1 |  |
| EFD-20 | 20.0±0.55 | 20.0±0.3 | 6.65±0.15 | 3.6±0.15 | 15.4±0.5 | 8.9±0.2 | 15.4±0.5 | 7.0 | 1 | |
| EFD-20X25 | 20.0±0.55 | 25.2±0.4 | 6.65±0.15 | 3.6±0.15 | 15.4±0.5 | 8.9±0.2 | 20.6±0.4 | 8.6 | 1 | |
| EFD-25 | 25.0±0.65 | 25.0±0.3 | 9.1±0.2 | 5.2±0.15 | 18.7±0.6 | 11.4±0.2 | 18.6±0.5 | 16.3 | 1 | |
| EPC-10 | 10.2±0.2 | 8.1±0.2 | 3.4±0.1 | 1.9±0.1 | 7.6–0 | 5.0±0.1 | 5.3±0.2 | 0.9 | 4 | |
| EPC-13 | 13.2±0.4 | 13.2±0.4 | 4.6±0.2 | 2.05±0.15 | 10.7±0.4 | 5.6±0.15 | 9.0±0.4 | 2.0 | 3 | |
| EPC-16.8 | 16.8±0.3 | 14.8±0.3 | 5.75±0.2 | 2.8±0.15 | 13.5–0 | 7.7±0.15 | 10.8±0.3 | 3.8 | 4 | |
| EPC-17 | 17.5±0.3 | 17.1±0.4 | 6.0±0.15 | 2.8±0.1 | 14.3–0 | 7.7±0.15 | 12.1±0.4 | 4.4 | 3 | |
| EPC-19 | 19.0±0.5 | 19.5±0.4 | 6.0±0.25 | 2.5±0.15 | 16.0+0.5-0.3 | 8.5±0.15 | 14.5±0.4 | 4.9 | 3 | |
| EPC-25 | 25.0±0.4 | 25.0±0.4 | 8.0±0.2 | 4.0±0.1 | 21.0±0.35 | 11.5±0.2 | 18.0±0.6 | 12.6 | 3 | |
Electrical Characteristics
| Cores | AL-Value(nH/N2) Without air gap | ||||
|---|---|---|---|---|---|
| 2H1 | 2E2D | 2G1 | 2G8 | 2H8 | |
| EFD-12 | 850±25% | 750±25% | |||
| EFD-15 | 3500min | 2660min | 1600±25% | 1050±25% | 780±25% |
| EFD-20 | 3360min | 2800±25% | 1500±25% | 1450±25% | |
| EFD-20X25 | 1300±25% | ||||
| EFD-25 | 4500±25% | 2100±25% | 2000±25% | ||
| EPC-10 | 2940min | 2450min | 850±25% | ||
| EPC-13 | 3290min | 2380min | 1500±25% | 940±25% | 700±25% |
| EPC-16.8 | 3850min | 1400±25% | |||
| EPC-17 | 3500min | 1150±25% | 1000±25% | ||
| EPC-19 | 3080min | 2000±25% | 1100±25% | 880±25% | |
| EPC-25 | 1560±25% | 1450±25% | |||
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