Profile: Rayco Electronics Mfg., Inc. specializes in offering magnetic products. Our products include transformers, toroidal transformers, inductors, converters, PC board assemblies, cable assemblies, EMI filters, magnetic assemblies, magnetic amplifiers, planar magnetics and surface mount magnetics. Toroidal transformers offer the smallest size (by volume and weight), less leakage inductance, and lower electromagnetic interference (EMI). Their windings cool better because of the proportionally larger surface area. A 360 degree wound toroidal transformer has a high degree of symmetry. Its geometry leads to near complete magnetic field cancellation outside of its coil; hence the toroidal transformer has less leakage inductance and less EMI when compared to other transformers of equal power ratings. The planar core consists of two flat pieces of magnetic material, one above and one below the coil. It is typically used with a flat coil and often becomes part of a printed circuit board. This design allows for a high power, small volume transformer. The industries we serve include automotive, lighting, communication, transportation, commercial, military, government and industrial markets.