Siemens 3RW4026-1BB04 Soft Starter

Siemens 3RW4026-1BB04 is a SIRIUS soft starter in the S0 size, designed to provide controlled ramp-up for three‑phase motors up to 11 kW at 400 V, helping to limit inrush currents and reduce startup mechanical stress. The unit is rated for 25 A and supports a broad input voltage window of 200–480 V AC with a 24 V AC/DC control circuit, featuring screw-terminal connections for straightforward, reliable panel wiring. Rated for ambient temperatures up to 40°C, this compact starter is well suited for installation in standard electrical cabinets where space is at a premium, delivering dependable soft-start performance for motor-driven equipment in industrial environments. Its combination of a compact form factor, robust terminal wiring, and Siemens’ SIRIUS reliability makes the 3RW4026-1BB04 a practical choice for engineers seeking a proven solution to reduce electrical stress and prolong motor life in lower‑to‑mid power applications.