Siemens 6SE6440-2AD31-1CA1 Soft Starter Module

Siemens MICROMASTER 440 6SE6440-2AD31-1CA1 is an 11 kW soft-start drive for 3‑phase motors, designed to operate from a three‑phase 380–480 V supply with a nominal frequency range of 47–63 Hz and a tolerance of +10%/−10%. It includes a built‑in Class A EMI filter to suppress conducted emissions and improve power quality. The drive provides overload capability of 150% for 60 seconds and 200% for 3 seconds, with a square‑law torque power rating of 15 kW, supporting robust startup under demanding loads. Its IP20 enclosure and ambient temperature rating of −10 °C to +50 °C suit indoor industrial environments. Physical dimensions are 245 × 185 × 195 mm (H × W × D). As part of the MICROMASTER 440 family, this module combines motor control with soft‑start functionality, enabling controlled ramping and reduced inrush during motor start, which enhances system reliability and electrical noise performance.