Eaton's OCTA-PAC family toroid power inductors/transformers utilize a high frequency, low loss core material in a secure, 4 terminal surface mount construction.  They can be used as single or coupled inductors or 1:1 transformers that provide isolation between two windings.  The windings can be connected in series or in parallel, offering a broad range of inductance and current ratings.  OCTA-PAC power inductors/transformers come in two footprints, 11.43 mm x 11.43 mm and 13.97 x 13.97 mm and 4 different heights, depending on your space requirements and can be used in several applications including computer and portable power devices, LCD panels, DVD players, buck, boost, forward, and resonant converters, noise filtering and filter chokes, DC-DC converts (as an inductor), transformers: (1:1), 300 Vdc isolation, SEPIC, flyback.