Anyone using Sendust (Fe,Si,Al) to absorb stray EMI?


Sendust is a magnetic metal powder that was invented by Hakaru Masumoto at Tohoku Imperial University in Sendai, Japan, about 1936 as an alternative to permalloy in inductor applications for telephone networks. Sendust composition is typically 85% iron, 9% silicon and 6% aluminum.

Molex and Oyaide make tape and sheets with varying thickness to control stray EMI.

I have used the Oyaide Sendust sheets with power distribution builds. I find it works best with power distribution. 
I would enjoy hearing others experiences. 
sonicshading

Showing 1 response by sonicshading

Hi, whostolethebatmobile

Yeah, I found the Mouser pricing to be really high too.

If you're down under, I recommend the Oyaide MWA-030L (A4 size).
Not sure about your conversion, but it cost me about 50-60 USD.
You can get smaller sheets for half the price too. they also have a tape.
these smaller sheets are around 20 USD:
https://oyaide.com/catalog/products/p-3974.html

The only place on audio gear that I used the sheets is around the AC iec inlet or power supply. But mostly just in and around the AC outlets and breakers.
Here are some examples for those interested:
https://oyaideshop.blogspot.com/search?q=MWA

Stay away from the MWA-100 S as it is 1 mm thick, and I find it affects frequencies in the audio band. The only place you might find use for this is in a AC breaker box with all your circuits radiating and possibly absorbing EMI.