TDK is offering transformers with a significantly reduced mounting area. In order to make the transformers smaller, the supplier has selected core materials optimised for specific applications. This series of transformers uses the new ferrite material, PC47, which allows the product to be smaller. Another design technique is the use of elliptical cores in multiple output transformers (such as those used in DVD players). This resulted in a reduction of 22.5% in the mounting area and 27% in volume. The SRW2420EG, SRW2425EG, and SRW33EX are RoHS compliant. More