The OHMITE RJS8R0E is a wirewound rheostat, a type of variable resistor used for controlling electrical power. These devices are commonly found in applications requiring adjustable resistance, such as motor speed control, volume adjustment, and dimming circuits. The RJS8R0E offers a robust design and is suitable for industrial environments. Consult catalog #203 for complete specifications and application details. Due to their electro-mechanical nature, these rheostats have a finite lifespan.