ACH580-01-03A4-4+B056 — what lands on the BOM line
The ABB ACH580-01-03A4-4+B056 is the frame-01 ACH580 drive rated for 3 to 3.3 A input on a 400 to 480 VAC three-phase supply at 50/60 Hz, with the +B056 option code appended to the base order string. At 2.18 kg it sits at the small end of the ACH580-01 family — a panel-mount unit sized for fractional-kW motor control rather than the larger currents found in mid-frame ACH580 builds.
Reading the input rating
The 3 to 3.3 A figure on the nameplate is the continuous input current the drive expects at 400 to 480 VAC three-phase; that is the figure that decides whether the upstream breaker, line reactor and contactor are sized correctly, and the figure a commissioning engineer crosses against the motor's full-load amps before first start.
Where the +B056 option fits
The +B056 suffix is appended to the base ACH580-01-03A4-4 order string as factory-installed option content — typical of ABB's option-coding on the ACH580 platform for hardware or firmware add-ons specified at the time of order. The base drive rating (3 to 3.3 A, 400 to 480 VAC, 50/60 Hz) is unchanged; the option code governs what ships alongside the drive and must be carried into the BOM line as written.