This RWS02J51R0A520NH electronic part is a Wirewound Resistor, manufactured by Futaba, and rated for 51 Ohms ±5% at 2W. It is an axial type resistor and is RoHS compliant. Wound wire resistors are designed for applications requiring power dissipation up to 500 watts. They are commonly used in a variety of industrial, medical, and consumer applications, such as automatic coffee makers, air conditioners, and laser systems. The RWS02J51R0A520NH resistor is also suitable for use in consumer electronics, computer equipment, motors, and power supplies.