As shown in the table and chart here, the RCS series parts are specified to withstand continuous power dissipation of two or more times that allowed for standard thick film chip resistors of the same size. For example, while a standard 0603 size thick film chip resistor may only dissipate 0.1 W, the RCS0603 can handle up to 0.25 W. While a standard 0805 size thick film chip resistor may only dissipate 0.125 W, the RCS0805 can handle up to 0.5 W. If even more power dissipation is needed, Vishay’s CRCW-HP resistor series is a potential solution.