Product Description:

The FC-051PK37T4E20H3 is an AC variable frequency drive manufactured by Danfoss for the VLT FC 51 Micro Drives series. It provides programmable speed control for small induction motors used in conveyors, fans, pumps, and other automated machinery. The drive converts a fixed mains supply into a variable-frequency output, allowing the connected motor to operate at a speed suited to changing process demands. This electronic control can reduce energy usage in applications that would otherwise regulate flow or movement through mechanical throttling. It also supports controlled acceleration and deceleration, which can reduce abrupt mechanical loading on connected equipment.

Incoming line power spans 380–480 VAC, and the converter is designed for three-phase power commonly available in low-voltage industrial distribution systems. Its inverter section is rated for 0.37 kW, allowing the electronic stage to deliver continuous power to an appropriately sized motor. The unit has an IP20 chassis that guards against accidental contact with internal components while allowing heat to escape through cabinet airflow. Installation inside a suitable enclosure protects the open chassis from moisture, excessive dust, and other contaminants. A built-in RFI Class A1/B filter limits conducted electrical interference and can reduce the need for separate filtering components. Adequate spacing around the housing helps maintain airflow and prevents heat from accumulating near the power electronics.

The supported mechanical output is 0.50 HP, providing a familiar motor-power reference for applications that use imperial units. The 051 type code identifies the drive configuration within the product line and helps distinguish it from units with different power or enclosure options. Programmable parameters allow motor operation to be adjusted for the connected load instead of relying on fixed-speed control. Gradual speed changes can reduce stress on couplings, belts, and driven machinery during starts and stops. The compact format is suited to control cabinets where available mounting space is limited, while the accessible control interface supports routine parameter adjustments. Proper motor data, protection settings, and acceleration limits should be entered before regular operation so the drive can regulate output according to the application’s operating requirements.