could someone please help me to identify what is long white SMD with JR marking? I am trying to draw a schematics for better understandig how ethernet and PoE on this device is implemented.
It has near zero resistance and i could not google anything with JR marking witch would have this shape. Board function is Ethernet input overvoltage protection and PoE voltage extracting.
My best guess is that it is fuse but it is quite big one.
And i don't understand why there would be two of those - one is connected to +48V supply over ethernet and one is 0V. Both lines are separated from chassis grounding