RSBT4016FV21HP is a three-phase controlled soft starter designed for scroll compressors up to 32 Amp nominal current. It features a patented auto-adaptive algorithm that automatically adapts to the specific compressor, ensuring optimum inrush current reduction without requiring user settings. The unit operates at 340-440 VACrms (400 VAC nominal) with a rated operational current of 16 Arms at 40°C, and includes integrated bypass relays for reduced heat dissipation. Key protections include over-temperature, overcurrent, and locked rotor protection, with a short ramp-up time of less than 600 ms. The HP version is optimized for multi-compressor systems and high-pressure starts, making it ideal for HVAC and refrigeration applications requiring reliable compressor soft starting.