The OHMITE RJS50RE is a wirewound rheostat, a type of variable resistor used in a wide range of industrial applications requiring precise control of electrical circuits. These rheostats are known for their durability and ability to handle high power dissipation. They are suitable for applications such as motor speed control, lighting dimming, and volume adjustment in audio equipment. Models H, J, G, K, L and N are listed under UL File No. E-10946 and CSA File No. 21309. Consult catalog #203 for complete details.