Siemens 6SE3223-5DH40 Midimaster Vector AC Drive

Siemens 6SE3223-5DH40 Midimaster Vector AC Drive (MDV1850/3) is a three-phase inverter designed for 380–500 V AC input with +/-10% tolerance, optimized for 50/60 Hz operation in industrial automation. It delivers continuous torque up to 18.5 kW (25 HP) with overload ratings of 150% for 60 seconds and 200% for 3 seconds, and a 22 kW VT rating for higher torque applications. The compact enclosure measures 550 × 275 × 210 mm (H × W × D) and carries IP21 / NEMA 1 protection for indoor panel mounting, with an ambient operating range of 0–40°C. Maximum input current is around 34 A at typical voltages, and the drive is built for vector control of AC motors in systems requiring precise speed and torque regulation within a 380–500 V network. This MIDIMASTER Vector device is part of Siemens' legacy line designed to replace older Micromaster and Simovert components while delivering reliable performance in demanding environments.