Siemens 6SE6420-2UD24-0BA1 Soft Starter Module

Siemens 6SE6420-2UD24-0BA1 MICROMASTER 420 is a compact 4 kW, 380–480 V three‑phase variable speed drive designed to start and regulate AC motors with smooth acceleration and deceleration. It accepts 3‑phase input in the 380–480 V range and delivers controlled output up to about 63 Hz, with a rated overload of 150% for 60 seconds for demanding loads. The unit’s enclosure measures 202 mm (H) × 149 mm (W) × 172 mm (D) and carries IP20 protection, making it suitable for indoor cabinet mounting in industrial environments. It operates across a temperature range from −10 to +50 °C and is specified without AOP/BOP options for this variant. Common applications include conveyors, pumps, and fans where reliable speed control and gentle start/stop behavior are critical, and this 6SE6420‑2UD24‑0BA1 variant is documented as a MICROMASTER 420 spare part for 4 kW, 380–480 VAC installations.