Product Description:

The Danfoss 176F3494 belongs to the VLT PowerCards series and functions as a replaceable power card inside VLT drive cabinets. The board hosts insulated-gate transistors, snubbers, and current sensors that convert incoming three-phase mains into the modulated output required by AC motors. In this role, it forms the switching stage that lets the drive regulate motor voltage and frequency during speed changes. Because it is field-exchangeable, drive operation can be restored quickly, which helps reduce downtime in automated material-handling lines, HVAC plant rooms, and process skids that depend on continuous speed control.

The card is designed to accept line potentials up to 690 V while still starting conduction at a minimum supply of 525 V. This high-voltage span aligns the module with VLT drives used on 500- to 690-volt distribution networks common in heavy industry. Its silicon layout and copper thickness support a continuous motor output of 75 kW, so the same card can sustain sizable centrifugal loads without derating. The assembly is rated for Normal Overload (NO) duty, which means it tolerates standard 110% current surges rather than the extended overload used in high-torque process cycles. Internally, the unit is coded as a Power Card and interfaces to the control board through keyed connectors that transfer gating, current feedback, and fault signals.

The net and gross shipping mass are both 2 kg, indicating that no separate heat sink or auxiliary frame is attached. The card uses conformal coatings and a ruggedized construction, allowing reliable operation under vibration and airborne contaminants commonly present near compressors or milling equipment. Mechanical supports help stabilize the board during cabinet vibration and maintain spacing around the power devices. Mounting is aided by alignment holes that follow the cabinet pattern used for this series, so the part can be installed in the original position without changes to the screw locations.