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

Siemens MICROMASTER 440 6SE6440-2UD21-5AA1 is a 3‑phase variable frequency drive designed for 380–480 VAC input and 1.5 kW (2.00 hp) output to AC motors. It supports 3‑phase line voltage of 380–480 V ±10%, 47–63 Hz line frequency, and provides a 480 V rated output with a current rating of 4.10 A, making it suitable for moderate‑power, constant‑torque applications in industrial automation. The drive offers a wide speed range with an output frequency of 0–650 Hz (production limit 550 Hz) and a power factor around 0.95 with an efficiency of about 96%. Enclosed in an IP20 housing, it is intended for indoor use at ambient temperatures from -10 to +50 °C. Its compact form measures 173 x 73 x 149 mm (H x W x D), and it supports a robust overload capability of 150% of the output current for 60 seconds, followed by 100% for 240 seconds within a 300‑second cycle. The MICROMASTER 440 family offers control modes including Vector, FCC, and Linear – V/F, enabling precise motor control and torque characteristics across varied loads.