Transformer with 6 identical windings 4 sizes with 5 different lengths of air gap each Isolation voltage up to 1.5 kVAC Low leakage inductance Operating temperature: -40 ºC to +125 ºC By using different circuits more than 375 transformer solutions and about 125 choke solutions possible. Consequently, quick prototyping possibilities EFD size parts provide Basic insulation for a working voltage of 250VRMS when they are connected appropriate Flyback converters Forward converters Push-pull converters Step-up/step-down converters SEPIC