I'm trying to identify the SMD component (marked as D7 with an underline) on a circuit board of an ARGB LED controller. I think it is a diode or resistor, but I'm not sure about it. Please can I get some help with identifying it?
A resistance check could determine if it's a diode. It should exhibit a different resistance in each direction. A fuse would provide a short in both directions. "D" is very commonly used as a reference designator for diodes, but that is NOT a hard and fast rule.
That looks like an LP-USML400 resettable "polyfuse" made by Way-On.
D7 with mark F2, It's a Fast tripping resettable circuit protection.
The F2 next to it designates this as a fuse.... F1 is green
Looks like it could be a fuse. Looks identical to the one to the 12V pin from this.
D is used for diode in most cases by various techies. however not sure about under line representation,
It's a fuse for sure. We always designate ferrite beads with FB.
protected by Community♦ May 24 at 18:09
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