As shown in the graph with the triangle symbols, the RNCP Series has similar thermal performance to high power thick film chip resistors of the same size. The data in this figure was collected from a test setup that included ten resistors, each mounted to a typical PCB and powered up to full rated power. This is a more practical test condition than the usual method, which uses a single device per board. The single resistor per board data is also shown on the graph by the green and purple symbols for comparison. The data was measured with a thermocouple connected to each device and represents an average temperature for each package size.