MPP, Sendust, High Flux Cores

Sendust Powdered Cores (also known as Koolmu Cores) with its distributed air gap are made from a ferrous alloy powder. The base material is approximately 85% iron, 6% aluminum and 9% silicon. Sendust powders are made by atomization the base alloy melt. The powders are insulated and then pressed into various core shapes (toroidal or E-Cores) under very high pressure.

Sendust cores have very low core loss and good temperature stability. In high frequency applications, sendust cores offer up to 80% reduction in core loss over iron powder cores. Hence, Sendust cores significantly lower the temperature rise.

Applications

1. Switching Regulator Inductors:cores are Sendust powdered well-suited for high energy storage/filter inductors used in swatch mode power supplies. The 10,000 gauss saturation level of sendust cores provides a higher energy storage capability than with standard MPP cores or a gapped ferrite cores of the same size and permeability. Where significant ripple effect may contribute to heat rise, Sendust cores are better than powdered iron in this respects. In cases where temperature rise is not significant, Sendust cores will offer a size reduction over iron powder cores in a similar application. However, Sendust Cores are a little more expensive than iron powder cores.
2. In-Line Noise Filters: Sendust cores are ideal for in-line noise filters where the inductor must support large ac voltage without core saturation occurring. Line filters using Sendust cores can be smaller in size, requiring fewer turns than by using ferrite cores.
3. Pulse Transformers, Fly-Back Transformers: The high flux density and low core loss make Sendust cores excellent for unidirectional drive applications such as pulse transformers and flyback transformers

Availability
MPP, Sendust, and High Flux toroidal cores are available in ten (1 0) popular sizes and permeabilities ranging from 60 to 125 µi. Also, Sendust E-cores are available in A_L value ranging from 10 nH/N² to 210 nH/N² with core sizes with inside diameter ranging from 0.110/2.79 mm to .785/19.94 mm and outside diameter ranging from 0.500/12.7 mm to 3.0/77.5 mm. Please check with factory for other sizes and permeabilities not shown in this catalog.

Core Finish
Sendust cores are uniformly coated with a special epoxy finish. This finish provides a tough chemical resistance and high dielectric protection for the cores. Other color coatings and types are available on request.

Core coatings are tested to a minimum voltage breakdown of 500 volts.

Click here for cross reference chart.