Product Description:

Danfoss builds the FC-051P5K5T4E20H3B as part of the VLT FC 51 Micro Drives series. This compact variable-frequency drive receives fixed-frequency AC mains and delivers a modulated output that adjusts the speed of induction motors used in fans, pumps, and small conveyors. The inverter output lets the connected motor start, accelerate, and run at adjustable speed without relying on fixed mechanical throttling. It is intended for compact industrial panels where motor speed needs to track process demand rather than stay at full speed continuously. By matching motor speed to the load, the unit can reduce energy use and ease mechanical stress on connected equipment during routine operation.

The drive is rated for motors up to 7.5 HP when it operates at nominal conditions. Its continuous output rating is 5.5 kW, which places it in the common range for small-to-medium auxiliary machinery. Input terminals accept line voltages between 380 – 480 VAC, allowing direct connection to many low-voltage three-phase networks without a separate transformer. The drive uses a three-phase mains supply, which balances current draw across the supply conductors. The enclosure has an IP20 / chassis protection rating, so live parts are finger-safe but the unit should be installed inside an enclosure for dusty or wet locations.

A built-in brake chopper dissipates regenerated energy during rapid deceleration, helping keep the DC-link voltage within a safe operating range when the motor is slowing down. This feature is useful on applications with frequent stopping or speed changes that return energy to the drive. For electromagnetic compatibility, the integrated filter meets RFI Class A1/B, which helps reduce conducted noise on the supply lines when the drive operates near sensitive electrical equipment. The model code includes the numeric prefix 051, which identifies this version within the product range. It belongs to the VLT Micro Drive product group.