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Inductor with Isat much greater then Irms

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treez

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Hello,
The following 100uh Wuerth inductor has isat = 5.2A, and yet irms = 2.6A only.
Most of the other inductors in wuerth do not have such a difference.
Do you think its a datasheet typo?

Wuerth 100uH , WE-LHMI series

744373965101

datasheet
katalog.we-online.com/pbs/datasheet/744373965101.pdf?_ga=2.137874992.1222144001.1522417433-298410780.1522417433
https://katalog.we-online.com/pbs/datasheet/744373965101.pdf
 
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Hi,

an inductor especialy designed for DCM operation?

Klaus
 
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treez said:
Hello,
The following 100uh Wuerth inductor has isat = 5.2A, and yet irms = 2.6A only.
Most of the other inductors in wuerth do not have such a difference.
Do you think its a datasheet typo?

Wuerth 100uH , WE-LHMI series

744373965101

datasheet
katalog.we-online.com/pbs/datasheet/744373965101.pdf?_ga=2.137874992.1222144001.1522417433-298410780.1522417433
https://katalog.we-online.com/pbs/datasheet/744373965101.pdf
Click to expand...

I've been studying inductors in this range including this one specifically and no that's not a typo.

The thermal rating and the sat current are usually in the ballpark but its not uncommon for it to go either way in terms of which is greater.

Such an inductor can be quite useful if its passing AC current where peak would be rms*sqrt2. And it's also safe at handling transients without saturating. The next size up from that is this (I forget whether wurth has this size but pulse is unique in providing a core to winding voltage rating):
https://products.pulseelex.com/product-details/pa4344-104nlt/1680/
 
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