Siemens 6SE6440-2UD21-1AA1 Frequency Inverter

Siemens MICROMASTER 440 6SE6440-2UD21-1AA1 frequency inverter provides 1.1 kW continuous-torque drive for 3‑phase motors from a 380–480 V AC supply, with an output frequency range up to 0–650 Hz and overload capability of 150% for 60 seconds or 200% for 3 seconds. The compact unit measures 173 × 73 × 149 mm (H × W × D), carries IP20 protection, and is rated for ambient temperatures from −10 to +50 °C, available without built‑in filters or an AOP/BOP panel. The 2UD21‑1AA1 variant corresponds to about 2.3 kVA (1.1 kW), making it suitable for small-to-mid sized industrial automation tasks where precise speed control of single motors is required.