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BenandAmber Guru Joined: 16/02/2019 Location: United StatesPosts: 961
Posted: 02:02am 06 May 2019
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This is not my ad
I bought some capacitors off this guy
now I'm buying a couple of these to make a bigger choke for my 10000 watt China board and the other one for the power Jack
This guy bought out a inverter company that went under so all these parts were originally bought for inverters
Oh yeah and since I bought two of them he sold them to me a little bit cheaper 41 bucks for two of them
I'm not sure if these are ferrite or not they're kind of heavy
Not laminated definitely ferrite
He has a lot of other miscellaneous inverter Parts also that he sells on eBayEdited by BenandAmber 2019-05-17be warned i am good parrot but Dumber than a box of rocks
Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406
Posted: 06:25am 06 Mar 2020
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There is enough information there to reverse engineer that.
Green/yellow core looks like Micrometals powdered iron mix 40.
Part number T520-40D which is the largest size available. 5.2" OD, 3.08" ID, height 1.6"
Published Al value 240nH for one turn. Fifty one turns 51 x 51 x .24uH = 624uH which is pretty close to what you measured. It very likely has 50 turns.
Looking at the magnetization curve, it has a very soft saturation characteristic. At 100 Orsteads about 40% of initial permeability. That works out to 40% of 624uH = 250uH at 52 amps.
At 200 Orsteads about 22% of 624uH = 55uH at 104 amps.
All very nice, and pretty fair value for $31 US dollars. That's about roughly $50 Aussie bux.