Насколько я понял из даташита, дросселя по USB

Насколько я понял из даташита, дросселя по USB стоят не как защита, а как фильтр- и только...

Testing has shown that common-mode chokes can provide required noise attenuation. A design
should include a common-mode choke footprint to provide a stuffing option in the event the choke
is needed to pass EMI testing. Figure123 shows the schematic of a typical common-mode choke
and ESD suppression components. The choke should be placed as close as possible to the USB
connector signal pins. In systems that route USB to a front panel header the choke should be placed
on the front panel card. See Chapter11.7.6.3.