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ETD (Economical Transformer Design) cores were
developed for Power Transformer cores used in Switched Mode power supplies. The combined cross-sectional area of the two outer limbs equals the
cross-section are of the centre limb allowing an even flux distribution throughout the core. This ensures the
absence of localised 'hot spots' that can reduce performance at high
frequencies or high flux levels. Their round centre limb provides for minimal winding resistance, leakage
inductance andncopper eddy losses.
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