In HVAC What is a device that reduces a compressor's load on startup?

In HVAC systems, a device that reduces a compressor's load on startup is a "soft starter." A soft starter gradually ramps up the voltage and current supplied to the compressor, minimizing the inrush current and mechanical stress during startup. This helps to prevent damage to the compressor and associated components, leading to improved efficiency and longevity of the system. Additionally, it can reduce the overall energy consumption during startup.