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Old 01-19-2022, 06:51 PM   #7
Badcaps Veteran
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 2,620
Default Re: Inductor or resistor

The part is a ferrite-core inductor used for a differential-mode filter, roughly around 1-5mH. Purpose is to lessen the EMI and RFI noise from the SMPS primary that radiates out to mains. You could read the colour codes for its value.
Cheapest chinese smps and wall-warts don't even have the inductor, they leave it out.
Typically you would see a common-mode choke there but this wall adapter is low power 1.8W output and just a single inductor is used instead.

The part must have got hit/broken somehow.
redwire is offline   Reply With Quote