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Electronics => Repair => Topic started by: mcovington on November 14, 2022, 02:26:08 am

Title: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: mcovington on November 14, 2022, 02:26:08 am
Not exactly a repair question, but could have been; if this belongs in a different forum, please advise.

From a defunct Wi-Fi router I salvaged a number of surface-mount parts, each rather large (maybe 6 or 7 mm square), gray ceramic, labeled "100".  I thought they might be power resistors, but they measure less than 0.2 ohm.  I haven't checked inductance.  Are they inductors?  The SM equivalent of ferrite beads?  Or what?
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: fzabkar on November 14, 2022, 02:35:30 am
Probably 10uH inductors (10 x 10^0). If they connect to an output pin on an adjacent IC, then they are probably part of a switchmode converter.
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: TheMG on November 14, 2022, 05:02:09 pm
A picture is worth a thousand words.
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: DavidAlfa on November 14, 2022, 05:12:55 pm
Can't understand why people keep doing this.
Make it a question, not a puzzle.

https://www.youtube.com/watch?v=uio1J2PKzLI (https://www.youtube.com/watch?v=uio1J2PKzLI)
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: mcovington on November 14, 2022, 09:47:48 pm
[attachimg=1]
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: DavidAlfa on November 14, 2022, 09:53:40 pm
That's coil. Probably 10uH.
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: mcovington on November 15, 2022, 12:58:10 am
Thanks.  The large size does suggest an inductor.
Title: Re: Name that component: 6x6mm, marked "100", meausres <0.2 ohm
Post by: DavidAlfa on November 15, 2022, 02:06:52 am
I guess you're seeking a short?
Often it'll be one of those ceramic capacitors, but there're hundreds, so better inject some current and find the one heating up.