MAGNETICSpowder cores are distributed air gap toroidal cores that possess many outstanding characteristics--high resistivity, low hysteresis and eddy current losses, and excellent inductance stability under both DC and AC conditions.
MAGNETICSpowder cores are not pressed with an organic binder, and therefore do not exhibit any thermal aging effects, as observed with powdered iron cores.

Special Advantages of MAGNETICS Powder Cores
• MAGNETICSis the world's leading manufacturer of powder cores
• MAGNETICS offers powder cores in the traditional toroid shape, as well as the exclusive Kool Mu E Cores, and the new MPP THINZTM, a line of very low height toroids
• Extensive quality control and testing assure consistent core performance

MAGNETICS Kool Mu powder cores are distributed air-gap toroidal cores made from a ferrous alloy powder for low losses at elevated frequencies.

The near zero magnetorestriction alloy makes Kool Mu ideal for eliminating audible frequency noise in filter inductors.
In high frequency applications, core losses of powdered iron, for instance, can be a major factor in contributing to undesirable temperature rises. Hence, Kool Mu cores are ideal because their losses are significantly less, resulting in lower temperature rises. It is possible that Kool Mu cores will offer a reduction in core size over powdered iron cores in a similar application. Kool Mu exhibits no thermal aging; cores are rated for 200 C continuous use.

Special Advantages of MAGNETICS Kool Mu Powder Cores
Switching Regulator Inductors

• Kool Mu Powder Cores are naturally suited for the energy storage filter inductors used in switch-mode power supplies. The 10,500 gauss saturation level of Kool Mu cores provides a higher energy storage capability than can be obtained with gapped ferrites of the same size and effective permeability.
• Where significant ripple may contribute to heat rise, Kool Mu cores perform better than powdered iron cores in these respects. In similar applications, it is possible that Kool Mu cores will offer a reduction in core size over powdered iron cores.

In-Line Noise Filters

• Kool Mu cores are ideal for in-line noise filters where the inductor must support large AC voltage without core saturation occurring. Line filters using Kool Mu cores can be smaller in size, requiring fewer turns than by using ferrite cores. Kool Mu cores are also near zero in their magnetorestriction coefficient, meaning that they are extremely quiet when operating with audible frequency range noise or line current.

Flyback Transformers, Power Factor Correction, and Pulse Transformers

• The high flux density and low core losses make Kool Mu cores excellent for use in power factor correction circuits as well as unidirectional drive applications such as pulse transformers and flyback transformers.

For complete technical information regarding material characteristics and core parameters, refer to the Powder Cores Design Manual and Catalog.

MAGNETICS Molypermalloy Powder (MPP) cores are distributed air-gap toroidal cores made from a 79% nickel, 17% iron and 4% molybdenum alloy powder for the lowest core losses of any powder core material.

MPP cores possess many outstanding magnetic characteristics, such as high resistivity, low hysteresis and eddy current losses, excellent inductance stability after high DC magnetization or under high DC bias conditions and minimal inductance shift up to 2000 gauss under AC conditions.

Special Advantages of MAGNETICS MPP Cores

Flyback Transformers, Buck/Boost and Power Factor Correction Inductors

• MPP cores offer the lowest core losses of any powder cores, making them ideally suited for flyback transformer applications. The distributed air gap of an MPP core minimizes stray magnetic fields and eliminates gap loss problems associated with gapped ferrite cores.

In-Line Noise Filters, High Q Filters, and Resonant Circuits

• MPP cores are the ideal choice where high Q and high inductance stability under adverse magnetic and environmental conditions are needed.

For complete technical information regarding material characteristics and core parameters, refer to the Powder Cores Design Manual and Catalog.

MAGNETICS High Flux powder cores are distributed air-gap toroidal cores made from a 50% nickel - 50% iron alloy powder for the highest available biasing capability of any powder core material.

High Flux cores have certain advantages that make them quite useful for applications involving high power, high DC bias, or high AC bias at high power frequencies. High Flux cores have a saturation flux density of 15,000 gauss, as compared to 8000 gauss for standard MPP cores or 4500 gauss for ferrite cores. The core loss of High Flux powder cores will offer a reduction in core size over powdered iron cores in most applications.

Special Advantages of MAGNETICS High Flux Powder Cores
Switching Regulator Inductors

• High Flux Powder Cores are naturally suited for the energy storage filter inductors used in switch-mode power supplies. The 15,000 gauss saturation level of High Flux cores provides a higher energy storage capability than can be obtained with gapped ferrites or powdered iron cores of the same size and effective permeability.
• High Flux cores will often result in a marked size and cost reduction when used in inductors that must carry large amounts of direct current.

In-Line Noise Filters

• High Flux cores are ideal for in-line noise filters where the inductor must support large AC voltage without core saturation occurring.
• Line filters using High Flux cores can be smaller in size, requiring fewer turns than powdered iron or ferrite cores.

Flyback Transformers, Power Factor Correction, and Pulse Transformers

• High Flux powder cores have a very low residual flux density. Combined with their saturation flux density of 15,000 gauss, this very large ΔB makes these cores excellent for use in power factor correction circuits as well as unidirectional drive applications such as flyback transformers and pulse transformers.

For complete technical information regarding material characteristics and core parameters, refer to the Powder Cores Design Manual and Catalog.