Magnetics

Powder Cores Material Overview

Magnetics® powder cores are excellent as low loss inductors for switched mode power supplies (SMPS), switching regulators, and noise filters. Molypermalloy (MPP), High Flux, Kool Mµ®, XFlux®, Kool Mµ® MAX, Edge®, and Kool Mµ® Hƒ powder cores are available, some in a variety of shapes.

  Kool Mµ® Kool Mµ® MAX Kool Mµ® Hƒ XFlux® High DCB XFlux® XFlux® Ultra High Flux Edge® High DCB Edge® MPP

Material Code

 77 79 76 78 78-S01 74 58 59 59-S01 55

Alloy Composition

 FeSiAl FeSiAl FeSiAl FeSi FeSi FeSi FeNi FeNi FeNi FeNiMo

Available Permeabilities

 14-125 14-90 26-60 19-125 26-60 26, 60 14-160 14-125 26, 60 14-550
Available Shapes Toroid, Block,
Round Block, Cylinder,
E, EER, EQ,
LP, U		 Toroid, Block,
Round Block, Cylinder,
E, EER, EQ,
LP, U		 Toroid, Block,
Round Block, Cylinder,
E, U		 Toroid, Block,
Round Block, Cylinder,
E, EER, EQ,
LP, U		 Toroid, Block,
Round Block, Cylinder,
E, U		 Toroid Toroid, Block,
Round Block, Cylinder,
E, EER, EQ,
LP, U		 Toroid, Block,
Round Block, Cylinder,
E, EER, EQ,
LP		 Toroid Toroid, THINZ™

Core Loss
mW/cm3) 100 kHz, 100 mT

 550 550 325 1280 1600 1035 625 675 500 450

Perm vs. DC Bias
(Oe) 50% of µi,

 95 130 115 170 200 180 185 205 230 105

Relative Cost

 1x 2x 2x 1.2x 1.2x 1.5x 4x-6x 5x 5x 7x-9x
Material Description Kool Mµ®, also known as sendust, is an economical low loss material with high saturation (10,500 gauss) Kool Mµ® MAX takes low core loss Kool Mµ material and enhances with 50% better DC bias performance for better handling. Kool Mµ® Hƒ powder cores are optimized for frequencies 200-500 kHz and exhibit approximately 35% lower losses compared to standard Kool Mµ®. XFlux cores offer an economical high saturation (1.6 Tesla) solution for use in low and medium frequency inductors and chokes. High DC Bias XFlux® cores offer the same high saturation found in standard silicon-iron XFlux while providing up to 20% improvement in DC bias. XFlux® Ultra cores offer the same high saturation found in standard silicon-iron XFlux while providing a 20% improvement in core loss. High Flux cores have saturation flux density that is three times or more that of ferrite. As a result, High Flux cores can support significantly more DC bias current or AC flux density. Edge® cores offer exceptional performance, with approximately 40% lower losses and 30% improvement in DC bias compared with High Flux. High DC Bias Edge cores offer the best DC bias performance of all alloy powder cores, up to 20% improvement compared to standard Edge®. MPP cores possess many outstanding magnetic characteristics, such as high resistivity, exceptionally low losses, and excellent inductance stability after high DC magnetization or under high DC bias conditions.