By "mfd", do you mean µF? I have some basic knowledge of electronics and am not familiar with "mfd" in this context but assumed you must mean microfarad.
Oh, wow, this is so bad. m usually means "milli" not "micro". At least they could have used u instead of µ, which is a more common replacement when you don't have the keyboard character available.
I guess from before the days of Unicode?
µF == the same thing, but tends to be the ‘more correct’ modifier used in electronics and engineering, rather than industrial parts supplier catalogs.