176F3502 Danfoss
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The Danfoss 176F3502 is part of the VLT PowerCards series and is a power card type component with a power rating of 400 kW. It is designed for 3-phase operation, weighs 1.5 kg, and features a coated and ruggedized PCB. The unit has a total volume of 14.267 dm3.
Internal Product Review
The 176F3502 VLT PowerCard from Danfoss is a coated and ruggedized power card designed for 3-phase systems. With a substantial 400 kW power rating, it is well-suited for demanding industrial environments. The overall build quality and protective coating make it an excellent option for maintaining performance and durability in harsh applications.
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Product Description:
The 176F3502 is a modular printed-circuit assembly produced by Danfoss for the VLT PowerCards series. It occupies the power stage slot in a VLT variable-speed drive and channels the rectified DC bus to the output IGBT modules, making it central to motor voltage generation in automated machinery. High-current paths and embedded sensors allow the companion control card to regulate torque and speed for pumps, compressors, and conveyors. The outline and terminal pattern match the standard VLT frame, so the board fits the intended enclosure layout without re-machining. In normal drive operation, it serves as the electrical bridge between the incoming DC link and the switching devices that synthesize the motor output waveform. This arrangement lets the drive switch motor phases with the timing needed for controlled acceleration and deceleration.
With a maximum output capability of 400 kW, the card is sized for drives that power large induction or permanent-magnet machines. Electrical tracks, fuse links, and busbars are sized for a three-phase AC supply, which supports balanced loading of the line conductors. Surface protection is provided by a coated and ruggedized finish, and the conformal layer helps shield copper traces from humidity, saline mist, and airborne chemicals. That layout supports stable current flow across the board during sustained load changes and repeated speed adjustments. The assembly uses an 7 input-voltage code, so it must be paired with drive frames rated for that AC range. A molded carrier gives the unit an overall displacement of 14.267 dm³, which is useful when checking airflow and spacing inside sealed panels.
Handling requirements are modest because the module has a 1.5 kg gross shipping mass and the same 1.5 kg net weight once unpacked. The low mass also reduces mechanical load on the heatsink bracket while the board is being positioned. Its designation as a Power Card distinguishes it from signal-level PCAs in the same lineup. Once mounted to the rails, the assembly maintains predictable thermal inertia and vibration tolerance during drive operation.
