RPS0500DH47R0JB Resistor, Screw, 47 ohm, RPS 500 Series, 500 W. The RPS 500 series from Vishay are power resistors for mounting onto a heat-sink. This range has been developed specifically for electrical traction applications and is capable of dissipating 500W at 70°C. The remarkable performance characteristics are evident when used in severe pulse conditions. The copper base allows easy mounting on the heat-sink and provides optimal dissipation conditions.