176F3501 by Danfoss

The 176F3501 is a printed-circuit assembly produced by Danfoss for the VLT PowerCards series of high-capacity variable-speed drive modules. As a power card, it forms the main conduction path between the rectifier and inverter sections, enabling energy transfer and fault monitoring inside large VLT frequency converters used in pumps, compressors, and material-handling equipment. This role places the board in the main power path, where stable current flow and controlled switching are essential to drive operation.

The card is designed for three-phase utility grids ranging from 525-690 VAC, so it can be used with high-voltage industrial supply systems in the intended range. Its continuous output capability is rated at 315 kW, placing it in the 315 kW power class. The PCA designation identifies it as a Power Card, so current-carrying traces, snubber components, and gate-driver functions are integrated on one board. The overload class is marked NO, which means the board is intended for nominal current operation without a timed overload margin. To help resist corrosion and conductive dust buildup, the copper layers use a Ruggedized conformal coating that covers solder joints and component leads.

The gross and net weight are both 1.2 kg, so the board remains relatively compact for a power-stage assembly of this class. Shipping volume is listed as 14.267 cubic decimeter, which indicates the package size used for transport and storage. Matching gross and net weight values show that packaging adds very little mass, while the listed volume helps determine space requirements for stocked replacement units. These physical values are useful when planning storage, transport, and placement with the associated drive hardware.