The OHMITE RHS2R0 is a wirewound rheostat, a type of variable resistor used for controlling electrical current in circuits. These rheostats are electro-mechanical devices, meaning they are subject to mechanical wear and have a finite lifespan. They are commonly used in industrial applications where adjustable resistance is needed, such as motor speed control, lighting dimming, and volume adjustment. The datasheet provides specifications for various models, including those with locking or standard shafts, and enclosed or open core designs. Refer to catalog #203 for complete details.