Siemens 6SE440-2UD24-0BA1 Variable Frequency Drive

Siemens MICROMASTER 440 drive, model 6SE6440-2UD24-0BA1, is a compact, non‑filtered 4 kW three‑phase inverter designed for 380–480 V systems. It provides precise V/Hz or vector control to control AC motors in industrial equipment, with an input range of 3AC 380–480 V (+10%/−10%) and a supply frequency of 47–63 Hz, delivering 4 kW of output power for reliable torque and speed control. The unit is specified as a “without filter” variant, commonly used in clean industrial environments where external line filtering isn’t required, and it supports overloads of 150% for up to 60 seconds and 200% for 3 seconds to handle short‑term surge conditions. Its compact enclosure measures 202 × 149 × 172 mm (H × W × D) and carries IP20 protection, with an ambient operating range of −10 to +50 °C, making it suitable for indoor machinery rooms and control panels. Typical applications include conveyors, pumps, fans, and machine tools where smooth acceleration, precise speed control, and reduced mechanical stress are priorities. This MICROMASTER 440 drive is part of Siemens’ legacy MM440 family, providing robust torque control and motor protection in a compact package without an integrated filter, enabling straightforward replacement of older drives in compatible PWM and soft‑start applications.