The SI-B8R221B20WW is a Samsung replacement part that is also known as a Dual Inverter Compressor. It is a four-pole, direct current, inverter-driven, variable speed type compressor with an integrated heat pump. This part is designed for energy efficient air conditioners, heat pumps and other cooling applications. The SI-B8R221B20WW has a capacity of 2.2Kw and is rated at a maximum pressure of 377PSI and a maximum displacement of 88cc/revolution. This part was designed to maximize efficiency, reduce energy costs and provide reliable operation. The SI-B8R221B20WW is not compatible with all models, so please refer to the Samsung website for more information about compatibility.