RSBT4025FV21HP is a three-phase controlled soft starter designed for scroll compressors up to 25 Arms rated operational current. It features a patented auto-adaptive algorithm that automatically adapts to the compressor specifications for optimum inrush current reduction without requiring user settings. The unit operates at 340-440 VACrms (50/60 Hz) with integrated bypass relays, a maximum current limit level of 90 Arms, and a ramp-up time of less than 600 ms. It includes comprehensive protection features such as over-temperature, overcurrent, and locked rotor protection. This soft starter is ideal for multi-compressor systems in HVAC and refrigeration applications where reliable and efficient motor starting is required.