In my qualified answer I said "single inductors" are not polarized. There are sometimes coupled inductors wound on a common core that behave like transformers, and there, polarity can make a difference.Thank-you, I googled my question and most answers were no but a few were yes depending on inductor so I had to ask.
Well a single inductor should have exactly two leads and measure a low DC resistance with an ohmmeter. If there are more than two visible leads; further investigation is required.I did notice that and that's what I was reading, didn't know what mine was so here I am. Thanks again!
Since you are asking about a specific inductor, how about looking at the data sheet that is linked for that specific inductor?Hi, is this inductor polarity sensitive?
In theory yes, however in practical use you may want to orient it in the preferred way. The thing is that when you use an inductor which has more than one layer of windings in a high ripple voltage circuit such as an SMPS, you will want to connect the lead from the outer layer toward the output cap which is more stable and shields the inductor better, and feed the pulsing voltage to the inner layer. This can have a significant effect on radiated electromagnetic emissions aka the radio interference your circuit causes and be the difference between passing and faililng compliance tests.No, single inductors are not polarity sensitive.
That's good to knowWell a single inductor should have exactly two leads and measure a low DC resistance with an ohmmeter. If there are more than two visible leads; further investigation is required.
I did look in the datasheet but couldn't find nothing. Yes I'm sure its there but some of these data sheets don't use general terms so they can be very hard to understand when you know nothing about this stuff.Since you are asking about a specific inductor, how about looking at the data sheet that is linked for that specific inductor?
The answer will be no because that is just a run-of-the-mill fixed 47 uH, 40 mΩ, 3A inductor, but it is a good opportunity to get some practice finding answers in data sheets.
|Thread starter||Similar threads||Forum||Replies||Date|
|S||Inductors in-line with SPI||Digital Design||5|
|V||Please help me understand inductors||Homework Help||19|
|D||LTspice How to model coupled inductors in SMPS ?||Power Electronics||4|
|Decide between two inductors for a DC / DC converter||Analog & Mixed-Signal Design||6|
|D||Inductors and op-amps ?||Analog & Mixed-Signal Design||8|
by Gary Elinoff
by Robert Keim
by Gary Elinoff