Siemens 6SE6440-2UD21-5AA1 Variable Frequency Drive

Siemens 6SE6440-2UD21-5AA1 MICROMASTER 440 is a compact 1.5 kW three‑phase variable frequency drive designed for 380–480 V AC input and capable of delivering a 0–480 V AC output to motors, with a ±10% tolerance on the input and a 47–63 Hz operating range. This model is specified as “without filter,” and it belongs to the MICROMASTER 440 family, offering vector, FCC, and linear (V/Hz) control to suit induction motors while maintaining constant torque at the rated power. It features IP20 protection, a compact footprint of 173 × 73 × 149 mm (H × W × D), and an ambient operating temperature range of −10 to +50 °C, making it suitable for demanding industrial environments. Overload capability is rated at 150% for 60 seconds and 200% for 3 seconds, with torque behavior described as square‑law torque for applications requiring higher transient performance. Typical configurations support a direct 380–480 V three‑phase supply and deliver up to 1.5 kW of mechanical output, aligning with systems that demand efficient motor control in limited space. This drive is used for a broad range of industrial automation tasks where compact size, reliable three‑phase motor control, and robust overload characteristics are essential, without the need for an integrated filter or additional AOP/BOP accessories.