176F2137 by Danfoss

The 176F2137 power card is produced by Danfoss and belongs to the VLT PowerCards series. It is a plug-in assembly that installs on the power section of a VLT inverter, where it carries the insulated-gate drivers, current sensors, and gate-firing logic required to commutate the main IGBT modules. By grouping these functions on one board, the card supports power conversion in variable-speed drive cabinets used throughout industrial automation. These onboard circuits switch and monitor the power devices so the inverter can regulate motor output with the timing expected by the control electronics.

As a Power Card, the board integrates copper planes sized for the inverter output stage and provides direct mounting pads for snubber capacitors. Its use on the Inverter side places the circuitry between the DC link and the three-phase motor terminals, so gate timing and fault feedback remain synchronized with the drive control PCB. A thermal layout suited for 315 kW drive sections helps the card operate without exceeding component temperature limits, while the 500 V voltage class matches the insulation spacing and creepage distances on the board traces. All active and passive areas are coated with a conformal layer that helps protect solder joints from condensation, airborne oil, and conductive dust on production floors.

A gross mass of 2.5 kg gives the assembly substantial copper capacity while keeping installation manageable. The board occupies 13.774 dm³ in the cabinet, so it fits the intended inverter layout without extending beyond the expected mounting space. The net weight matches the gross figure, which means the handling mass is the same as the product mass during normal installation and storage. This helps the assembly fit into service stock and cabinet layouts without introducing extra handling material or added mounting allowance.