What the line carries
The ABB ACS355-03E-01A2-4+B063 is a frequency converter on the ABB ACS355 micro drive line, ordered under factory option suffix +B063, and sits in the Drives / Motor Drives category. For a panel spec the suffix is the part of the code that flags how this build departs from the base ACS355-03E-01A2-4 — any panel that was laid out around the base code should be checked against the option's footprint and wiring note before specifying.