The 350 kHz bandwidth sets the upper frequency limit for accurate current sensing. Below that, the amplifier tracks the shunt voltage with minimal gain error. If your load step is faster than that, you need a wider-bandwidth part.
Package and mounting — field-swappable size
SOT-23-6 is a small, surface-mount package. It fits on tight PCB layouts and can be hand-soldered or reflowed. The 6-pin footprint is standard; orientation is clear from the pin-1 marker. No special handling beyond normal ESD precautions.