The IC866-0185-4A3-2P delivers 39 A at 480 V three-phase — the 18.5 kW (25 HP) entry in Emerson's PACMotion VFD family with PROFINET RT factory-installed. 18.5 kW is a standard IEC frame size that maps to a wide range of industrial motors: a 25 HP mixer in a chemical processing vessel, a centrifugal pump in a municipal water booster station, a belt conveyor drive in a distribution center, a screw compressor in a food processing plant. At 39 A output, the drive operates entirely within the comfort zone of standard panel components — a 50 A contactor, 8 AWG motor conductors, and a 50 A circuit breaker fit a standard 600 mm panel section with room to spare. The IP20 chassis mounts vertically on the cabinet backplane, with forced-air cooling drawing from the bottom and exhausting at the top.

18.5 kW in the IC866 480 V range: between the 15 kW and 22 kW steps

The IC866 480 V class offers closely spaced power ratings: 15 kW (30 A, Frame 4), 18.5 kW (39 A, Frame 4), and 22 kW (46 A, Frame 4) — all sharing the same frame size and the same physical footprint. For a machine designer, the choice between these three ratings is not about physical space but about motor nameplate matching. A European motor labeled 18.5 kW is a distinct IEC frame size — different shaft height, different bolt pattern, different moment of inertia — from a 15 kW or 22 kW motor. Selecting the drive to match the motor nameplate current ensures the motor thermal model in the drive's firmware accurately tracks motor temperature during low-speed operation, where the shaft-mounted fan provides reduced cooling. The drive's electronic motor overload protection (I²t) uses the motor nameplate full-load current entered during commissioning — entering the actual 39 A for an 18.5 kW motor gives more accurate protection than configuring a 22 kW drive and limiting its output current in software.