Molybdenum Permalloy Powder (MPP) cores provide the maximum Q and lowest core loss. MPP is the most stable core with respect to temperature and AC flux. It has the widest range of permeabilities and is considered the premium material for direct current output inductors of switched mode power supplies.

HI-FLUX cores are a 50% nickel, 50% iron distributed air gap powder core. HF has up to 15,000 Gauss saturation flux density and core losses significantly lower than iron powder cores. These cores are ideal for switching regulator inductors, in-line noise filters, pulse and fly-back transformers applications. When used in applications with high DC current, HF cores can provide a reduction in inductor size as well as total cost.

SUPER-MSS is an improved Sendust material, originally develped by Arnold Engineering. It is designed to replace iron powder by offering much lower losses, with energy storage capability higher than MPP. SUPER-MSS cores are an excellent choice for energy storage and filter inductor applications in switch mode power supplies. The DC bias characteristics of SUPER-MSS are also excellent compared to iron powder of similar permeabilities and size.