SMC Products by Name

Fluxtrol soft magnetic composites (SMCs) are the magnetic flux controllers that concentrate, shield or redirect the field around an induction coil. This page compares the grades by name so you can narrow the choice quickly. The individual product pages below carry full data sheets, and the choice should always be confirmed against your frequency, power, cooling and coil geometry.

Three product families

• Machinable SMCs (Fluxtrol 100, Fluxtrol A, Fluxtrol 50, Fluxtrol 25, Ferrotron 559H). Made by powder metallurgy compaction and heat treatment, then machined into concentrators, shields and cores. They give the best magnetic properties of the SMC forms and work in 3D magnetic fields.
• Formable SMCs (Alphaform LF and MF). Magnetic particles in a thermal-curing epoxy binder, molded onto the coil and oven-cured. They suit irregular geometry and coils with low tolerances, and are isotropic.
• Laminate replacement (Fluxtrol LRM). A direct replacement for silicon-steel laminations on low and medium frequency coils.

Grade comparison

Fluxtrol 25 is rated up to 500 kHz and has the best elasticity of the family with excellent machinability. Ferrotron 559H Original adds higher strength, permeability, saturation and thermal conductivity compared with standard 559H. Long-term temperature resistance is 225 to 250 degrees C and short-term 300 degrees C across the family.

Choosing a grade

Match frequency first. Low frequency materials (roughly 1 to 50 kHz) carry high flux density and need high saturation and thermal conductivity. High frequency materials need lower losses and higher electrical resistivity. Fluxtrol 100 and Fluxtrol A cover the lower end, Fluxtrol 50 and 25 the middle, and Ferrotron 559H the high-frequency end.

Then consider what the part needs.

• Highest permeability and lowest losses at low to intermediate frequency: Fluxtrol A, with high magnetic and thermal anisotropy that must be designed around.
• Highest thermal conductivity, saturation and strength: Fluxtrol 100, with magnetic properties in the favorable direction similar to Fluxtrol A and much less anisotropy. This suits heavily loaded coils.
• Wide frequency range with good strength and machinability: Fluxtrol 50.
• Highest dielectric strength, lowest high-frequency losses, near-constant permeability: Ferrotron 559H. It is regarded by many as the most machinable grade, but its lower thermal conductivity limits heavy thermal loading.
• Irregular or small coils, quick installation, prototypes: Alphaform, applied directly to the coil.
• Replacing laminations on a coil: Fluxtrol LRM.

Ask for a recommendation

Each grade has distinctive properties that suit a certain range of electrical and design parameters, so narrowing down your frequency, power and cooling conditions gives the best result. Contact Fluxtrol for a material recommendation, or go straight to the SMC order form for pricing.