Introduction: Evolution of Industrial Drives
Industrial automation has evolved from simple motor starters to intelligent variable speed drives. The Siemens MICROMASTER 440 series represents a significant step in this evolution, offering precise control and energy efficiency. The 6SE6440-2UD41-1FB1 is a robust drive module designed for demanding applications.
As production lines became more complex, the need for flexible, reliable drives grew. The 6SE6440-2UD41-1FB1 answers this need with a proven design and high performance. It supports both low overload and high overload duty cycles, making it suitable for a wide range of industrial tasks.

Key Features & Technical Specifications
This drive module is built to handle heavy loads. Its input accepts three-phase AC power from 380 V to 480 V with a ±10% tolerance, accommodating typical industrial power systems. The line frequency range of 47 Hz to 63 Hz ensures compatibility with various regional grids.
- Rated input current: 245 A for low overload, 200 A for high overload.
- Rated output current: 250 A (LO) and 205 A (HO) at 480 VAC.
- Output frequency range: 0 to 267 Hz for V/f control.
- Pulse frequency: 4,000 Hz for smooth motor operation.
- Overload capability: 150% for 1 s (LO), 136% for 57 s (HO).
- Power factor: 0.95, efficiency: 0.97.
These specifications make the 6SE6440-2UD41-1FB1 a powerful solution. The high overload rating is particularly useful for applications with intermittent heavy loads, such as crushers or mixers.
Applications & Use Cases
The drive is suitable for pumps, fans, conveyors, and other industrial machinery. In pump applications, the variable speed control reduces energy consumption and mechanical stress. For conveyor systems, the drive provides smooth acceleration and deceleration, improving product handling.
With its 132 kW low overload rating, it can handle large centrifugal loads. Its robust design ensures reliable operation in harsh environments.

Installation & Setup
Proper installation is critical for optimal performance. Ensure the drive is mounted on a flat, vertical surface with adequate clearance for airflow. The cooling fan requires unobstructed ventilation to maintain safe operating temperatures.
Connect the input power to the designated terminals, observing the correct phase sequence. The output connections must be properly sized for the rated current. Always follow the manufacturer's manual for detailed wiring diagrams and parameter settings.
Maintenance & Reliability
Regular inspection of the cooling fan and air filters is recommended. Dust accumulation can reduce cooling efficiency and lead to overheating. Periodically check all electrical connections for tightness and signs of wear.
The drive's high efficiency (0.97) reduces energy losses and heat generation. This contributes to a longer service life and lower operating costs. Following a preventive maintenance schedule helps avoid unexpected downtime.
Compatibility & Integration
The MICROMASTER 440 series is designed to work with standard three-phase induction motors. The drive can be integrated into existing control systems using its built-in I/O and communication options. Refer to the official documentation for specific compatibility details.
Troubleshooting & Common Issues
Common issues include overcurrent trips, which may indicate a motor or wiring problem. Check the motor insulation and cable connections. Overheating can be caused by blocked airflow or excessive ambient temperature.
If the drive does not start, verify the control input signals and parameter settings. Use the built-in diagnostics to identify fault codes. For persistent issues, consult the troubleshooting guide in the manual.
Product Support & Availability
The 6SE6440-2UD41-1FB1 is available from AutoDCSTech. Contact our team for current pricing and lead times. We are ready to assist with your industrial automation needs.
Availability & Condition at AutoDCSTech
| Part Number | 6SE6440-2UD41-1FB1 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Germany |
