The meander trimming cut of the resistive element helps the TNPW series to be specified to a resistive drift of less than 0.05% when considering 1000 hours of operation with 0.05 W rated power applied to the resistor. This is also known as the endurance at 70°C test as described on the product datasheet. The chart and table shown here illustrate the specified resistive drift over time of the TNPW0201 series in comparison with thin film components from competitors of Vishay.