Product Overview

The Siemens 6SE6440-2UD21-5AA1 is a high-performance vector-controlled frequency inverter from the renowned MICROMASTER 440 family. Engineered for three-phase 380-480V AC supply networks, this 1.5 kW (2.0 HP) drive provides superior motor control for both constant and variable torque applications. The unit is characterized by its sophisticated control logic, offering a seamless transition between standard V/f linear curves and high-dynamic closed-loop vector control. Designed with a Frame Size A (FSA) footprint, this inverter maximizes power density in compact control cabinets while providing the heavy-duty overload capabilities required for demanding industrial startup cycles.

Technical Profile and Drive Configuration

• Rated Power Output 1.5 kW (2.0 HP) at 380V-480V AC

• Input Phase/Frequency 3-Phase / 47 Hz to 63 Hz

• Control Modes Linear V/f, Squared V/f, FCC (Flux Current Control), and Vector Control

• Output Frequency Range 0 Hz to 650 Hz

• Overload Rating 150% for 60 seconds; 200% for 3 seconds

• Digital/Analog Interfaces 6 Digital Inputs, 2 Analog Inputs, 2 Analog Outputs, 3 Relay Outputs

• Braking Support Integrated chopper for external braking resistor (min. 500 Ohm)

• Protection Class IP20 (Open Type)

• Operating Temperature -10°C to +50°C

• Mass Weight 0.95 kg

• Unit Dimensions 2.5 cm x 5.1 cm x 83.8 cm

• Manufacturing Origin Germany

This drive supports side-by-side mounting to optimize rail space and is compatible with both DIN rail and bolt-on installation methods. Note that this base unit is supplied without an integrated EMC filter or operator panel (BOP/AOP).

Industrial Applications and Dynamic Performance

The 6SE6440-2UD21-5AA1 is a versatile solution for complex automation tasks where precision and reliability are non-negotiable. In the material handling sector, its 200% peak overload capacity is ideal for belt conveyors and elevators that must start under full load conditions. For the textile and packaging industries, the integrated vector control provides the high-speed accuracy needed for winding and tensioning applications. In water and climate control sectors, the drive utilizes squared torque curves to maximize energy efficiency in centrifugal pump and fan operations. Its extensive I/O count allows for direct integration with multiple field sensors and safety interlocks, reducing the need for external PLC modules. Furthermore, the dynamic braking capability makes it highly effective for high-inertia loads requiring rapid deceleration, such as industrial centrifuges or high-speed rotary cutters.