The RNS25RE is a Model N wirewound rheostat with a power rating of 300 watts and a resistance of 25 ohms. It features an open-core construction and can operate with a maximum voltage of 1225V RMS and a maximum current of 3.46 amps. The device provides a rotational angle of 320 degrees and has a shaft torque of 2.5 to 5 lb. in. With its high power capacity and robust design, this rheostat is ideal for industrial controls, motor speed regulation, and load testing applications.