Siemens 6SE6440-2AD31-1CA1 Frequency Inverter

Siemens 6SE6440-2AD31-1CA1 MICROMASTER 440 frequency inverter drives three-phase AC motors in industrial automation, delivering precise speed and torque control for conveyors, pumps, fans, compressors, and general machine equipment. It accepts 3-phase 380–480 V AC (±10%), 47–63 Hz input, with 11 kW constant-torque capability and up to 15 kW for variable torque, outputting roughly 26–32 A, and it includes a built-in Class A EMC filter, fan cooling, IP20 protection, and a 96% efficiency rating. The unit supports digital inputs (6), relay outputs (3), and analog I/O, with overload capabilities of 150% for 60 seconds or 200% for 3 seconds; dimensions are approximately 245 × 185 × 195 mm and it operates from −10°C to +50°C. This model is discontinued and listed as a spare part, with common replacements including Siemens 6SE6440-2AD23-0BA1, 6SE6440-2UD31-1CA1, and 6AG1440-2AD31-1CA1.