The iron powder group for power application covers materials with permeabilities from 10 to 100 intended for frequencies ranging from line frequency to 5MHz. Core sizes range from .14 inches (3.4mm) to 6.5 inches (165mm) with an extensive selection of shapes including toroids, E-cores, U-cores, bus bar cores, hollow cores, plain cores, pot cores and pot core assemblies. Typical applications include; DC output chokes, differential-mode input chokes, continuous-mode flyback inductors, light dimmer chokes and other EMI/RFI applications.