The FR-A840-06100-2-60 is a Mitsubishi FR-A800 series inverter, 400V class, rated for 610 A SLD (standard light duty) continuous output. This is the standard model (structure code 0) with conformal coating (3C2) applied to the circuit board — a detail that matters when the drive sits in a cement plant control room or any environment where humidity, dust, and conductive grit are the norm. The coating eats the dust and runs; without it, tracking across the PCB in a 50 °C kiln-side cabinet is a matter of when, not if.
For heavy-duty (constant-torque) applications like a conveyor or extruder, you derate — typically to about 80 % of the SLD figure. That puts the practical heavy-duty limit around 488 A, which still covers a substantial motor. The 400V class means it accepts a nominal three-phase supply in the 380–480 V range, so it fits standard European and Asian industrial mains without a transformer. The conformal coating (3C2) on the PCB is a factory-applied silicone or acrylic layer that protects against condensation, conductive dust, and chemical vapors. In a cement plant, that coating is the difference between a drive that runs five years between failures and one that fails on the first wet-season night shift. The -60 suffix in the order code flags this variant — if your BOM calls for it, the uncoated version is a different part number and won't survive the same environment.