176F2128 by Danfoss

The 176F2128 belongs to the VLT PowerCards series produced by Danfoss and functions as a removable power stage for high-power VLT drives used in industrial automation. Installed behind the main control board, this assembly routes DC link energy to the IGBT output bridge so the connected motor receives regulated voltage and frequency. It carries the heavy switching currents generated during inverter operation while keeping high-energy paths separate from the signal electronics. That separation helps limit interference near low-level control circuits and supports stable drive operation under changing load demand.

As a drive component built for demanding loads, the card is rated to deliver up to 450 kW of motor power when the upstream supply is held at 400 V. Despite this capacity, the module keeps its mass to 2.5 kg, which reduces strain on guide rails and support hardware during installation. Sensitive copper traces and semiconductor junctions are protected by a coated finish that limits moisture absorption and particulate tracking in polluted switchrooms. Because it is a dedicated power card, thermal pads, busbar stubs, and fault-sense connectors are integrated into the assembly for direct connection to the existing backplane. This layout helps the inverter section transfer current efficiently while maintaining orderly spacing between power conductors and sensing points.

The unit is identified as VLT (Danfoss), which matches the electrical platform used by related VLT accessories and control sections. A housing volume of 14.586 L leaves room for factory-installed heat sinks and airflow channels that remove IGBT losses without external duct modifications. The internal space also supports the clearances needed around switching devices, bus connections, and thermal interfaces. The common outline used throughout the VLT PowerCards line supports consistent fit within compatible cabinet layouts and keeps the card aligned with mating guides and connection points.