Product Description:

The SM 47/20-G16 is an AC inverter manufactured by Bosch Rexroth Indramat for the SM AC Inverters series. Installed in control cabinets across assembly lines or utility stations, it converts fixed mains power into a variable three-phase output so that induction or synchronous motors can be driven at the speed each task requires. By performing this conversion electronically, the unit supports energy savings, smoother startups, and precise torque control within automated production cells.

Internally, the inverter maintains a DC bus of 325 V DC; this rectified reservoir supplies the IGBT bridge that produces the motor waveform. The semiconductor stages switch at a 10 kHz carrier, which is high enough to push audible noise above most machine-shop background noise while still keeping thermal stress manageable. When cabinet airflow is limited, the drive supplies a continuous output current of 4.7 A, and fitting a clip-on fan raises that figure to 11 A for heavier duty cycles. Short bursts of mechanical demand are handled by a five-second crest capability of 20 A, allowing large inertial loads to accelerate without triggering overcurrent shutdown. These ratings let the module pair with medium-frame motors used on indexing tables, conveyors, and compact pump skids.

The housing carries a IP20 protection code, which is appropriate for climate class 3K3 switchgear rooms kept free of conductive dust. Power lost as heat tops out at 13 W, so the 60.36 mm width and 262.1 mm height can fit alongside other electronics with only modest ventilation space. Approved service temperatures range from 0 °C to 55 °C, and operation is permitted at altitudes up to 1000 m, where reduced air density slightly affects cooling. For storage, the allowable window expands from −25 °C to 70 °C, and the 2.4 kg mass keeps handling straightforward during panel installation.