Description
The Siemens 6SE6440-2UD31-5DA1 is a MICROMASTER 440 variable frequency drive designed for precise control of three-phase AC motors in industrial automation systems. It provides up to 15 kW constant torque output and supports a wide input voltage range of 380–480 V, enabling efficient motor speed regulation and energy optimization in demanding applications.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Siemens |
| Category |
Motor Control |
| Part Number |
6SE6440-2UD31-5DA1 |
| Subcategory |
Variable Frequency Drives |
| Drive Series |
MICROMASTER 440 |
| Input Voltage |
3 AC 380–480 V ±10% |
| Input Frequency |
47–63 Hz |
| Constant Torque Power |
15 kW (20 HP) |
| Squared Torque Power |
18.5 kW (25 HP) |
| Rated Output Current (HO) |
32 A |
| Rated Output Current (LO) |
38 A |
| Power Factor |
0.95 |
| Efficiency |
0.96 |
| Output Frequency Range |
0–650 Hz (550 Hz production limit) |
| Pulse Frequency |
4,000 Hz |
| Digital Inputs |
6 |
| Relay Outputs |
3 |
| Analog Inputs / Outputs |
2 / 2 |
| PTC/KTY Interface |
1 |
| Protection Rating |
IP20 / UL Open Type |
| Cooling Method |
Fan Cooled |
| Operating Temperature |
-10 to +50 °C |
| Dimensions (H × W × D) |
520 × 275 × 245 mm |
| Frame Size |
FSD |
| Weight |
16.00 kg |
Information About 6SE6440-2UD31-5DA1
The 6SE6440-2UD31-5DA1 is part of the Siemens MICROMASTER 440 series, a family of high-performance frequency inverters engineered for flexible motor control in industrial environments. Built with a robust D-frame enclosure and IP20 protection rating, it is suitable for installation in control cabinets and panel systems. The drive supports advanced vector control and V/f control methods, allowing stable performance across varying load conditions such as conveyors, pumps, fans, and processing equipment. Integrated I/O interfaces, programmable parameters, and thermal protection features ensure reliable operation and seamless integration into automated production systems.
Key Features:
- 15 kW Constant Torque Output: Designed to deliver reliable power for demanding industrial motor control applications.
- Wide Voltage Range: Supports 3-phase 380–480 V AC input with ±10% tolerance for flexible installation.
- Advanced Motor Control: Provides V/f and vector control modes for accurate speed and torque regulation.
- High Overload Capability: Supports 150% overload for 60 seconds and 200% for 3 seconds during peak load conditions.
- Integrated I/O Interface: Includes digital inputs, relay outputs, and analog I/O for flexible automation integration.
- High Efficiency Operation: Achieves efficiency up to 96% to minimize energy losses and operating costs.
- Extended Frequency Range: Output frequency range up to 650 Hz (production limit 550 Hz) for specialized motor applications.
- Compact Industrial Design: D-frame enclosure with fan cooling and IP20 protection for cabinet installation.
The 6SE6440-2UD31-5DA1 delivers the reliability and precision required for advanced motor speed control in industrial automation systems.
