The drive on the BOM line
The ABB ACS355-03U-38A0-4+J400 is a 3-phase 380-480 V input micro drive, sold under the ASEA BROWN BOVERI nameplate, sitting one line down in the Motor Drives category under Drives. That 3~ 380-480 V input window is what fixes the supply side of the BOM — the cabinet feeds it from a 400 V class three-phase bus, and any swap-in has to accept the same range without re-tapping a transformer. Listed at 4.54 kg, the unit is a single-technician lift into a wall-mount cabinet — a one-person panel-builder job, not a two-person rigging call — which is the kind of detail that decides how the spare is kitted for a line-down event.
Where the ACS355-03U-38A0-4+J400 actually works
Configured as a 3~ 380-480 V input micro drive, the +J400 build option targets small three-phase induction motors on pumps, fans, conveyors, and mixers in the ABB ACS355 line. The +J400 suffix on a 38.0 A frame is a factory build option, not a different motor size — same enclosure footprint, same input range, same control terminal block, which is what keeps the panel-builder's wiring drawing and the I/O map unchanged when a replacement is fitted.
What swaps in if this one goes down
The ACS380-040C-032A-4+K475 is a different frame at 32 A on a 400 V input, built around a newer control platform — same voltage class, lower current class, different firmware and parameter tree, so it is not a panel-swap for the 38.0 A ACS355 line.
Sourcing posture
The ACS355-03U-38A0-4+J400 is specified into the BOM and quoted to order against an RFQ — the line gets filled against the build code a buyer names, and the +J400 build option is ordered as part of that string rather than as a separate line item. With the ACS320-03U-38A0-4 confirmed as a like-for-like current class, the cabinet layout stays intact if that path is taken; the ACS310-03U-50A8-2 and ACS380-040C-032A-4+K475 are catalogued but do not cross-shop this line.