EFD25
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MAGNETIC PRODUCTS
DATA SHEET
EFD25 EFD cores and accessories
Product specification File under Magnetic Products, MA01 1997 Nov 21
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Philips ponents
Product specification
EFD cores and accessories
CORES Effective core parameters SYMBOL Σ(I/A) Ve Ie Ae Amin m PARAMETER core factor (C1) effective volume effective length effective area minimum area mass of core half VALUE 1.00 3300 57.0 58.0 55 ≈8 UNIT mm- 1 mm3 mm mm2 mm2 g
25 0.65 18.7 0.6 11.4 0.2 9.1 0.6 0.2
MGC342
EFD25 handbook, halfpage
12.5 0.15
9.3 0.25
5.2 0.15
Dimensions in mm.
Fig.1 EFD25 core half.
Core halves Gapped cores are available on request. Clamping force 40 ±20 N. GRADE 3C30 3C85 3C90 3F3 3F4 AL (n H) 1800 ±25% 2200 ±25% 2200 ±25% 2000 ±25% 1000 ±25% µe ≈1450 ≈1780 ≈1780 ≈1600 ≈800 AIR GAP (µm) ≈0 ≈0 ≈0 ≈0 ≈0 TYPE NUMBER EFD25-3C30 EFD25-3C85 EFD25-3C90 EFD25-3F3 EFD25-3F4
Properties of core sets under power conditions B (m T) at GRADE H = 250 A/m; f = 25 k Hz; T = 100 °C ≥360 ≥320 ≥330 ≥315 ≥300 f = 25...
