The Z-Foil Technology provides a significant reduction of the resistive component's sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). Model VPR221SZ is a 4 lead kelvin connected surface mount device which provides high rated power, excellent load life stability, low Temperature Coefficient (TCR) and low Power Coefficient (PCR) - all in one resistor. 0.05 ppm/C Absolute TCR removes error due to temperature gradients. By taking advantage of the overall stability and reliability of