Siemens 6SE6420-2UC12-5AA1 Soft Starter Module

Siemens MICROMASTER 420 drive, model 6SE6420-2UC12-5AA1, is a compact 0.25 kW variable‑speed drive designed to start, accelerate, and regulate small motors from a 200–240 V AC supply. As part of the Micromaster 420 family, it provides soft‑start and speed control to reduce mechanical stress and electrical inrush, delivering up to 0.25 kW (0.33 hp) of output power and enabling simple torque ramps and speed profiles. The unit's IP20 enclosure is intended for panel mounting, with dimensions around 173 x 73 x 149 mm (H x W x D) for the 0.25 kW version. The 6SE6420‑2UC12‑5AA1 variant is identified by its 2UC12 code and 5AA1 suffix, reflecting the 200–240 V input configuration and MM420 platform. It is commonly used in compact automation tasks where controlled motor speed and gentle starting and stopping are desirable, and its documentation describes straightforward parameterization for standard speed ranges and ramp settings, alongside protection features appropriate for general industrial use.