RC0402FR-071ML

RC0402FR-071ML is a 1 MΩ ±1% thick-film chip resistor from Yageo in a 0402 (1005 metric) case, documented by Yageo's per-part specification sheet: rated power 0.063 W at 70 °C, temperature coefficient ±100 ppm/°C across −55 °C to +155 °C, maximum continuous working voltage 50 V, overload 100 V and dielectric withstanding voltage 100 V, supplied on 178 mm tape at 10,000 pieces per reel. Working-voltage boundary for this value: at 1 MΩ the power-derived limit (the square root of allowable power x resistance) works out to about 251 V at the 70 °C rating — above the 50 V platform ceiling — so the ceiling is the governing limit; as temperature rises the allowable power derates, and the power limit takes over only once the derated figure falls below the ceiling; the governing limit is always the lower of the two. The selection point is the megohm in miniature: high-impedance bias, pull-down and leakage-path positions on dense boards. Selection advice: read the voltage ceiling as the binding constraint — 50 V continuous on this code against 200 V on the 1206 version of the same value (also listed here); at megohm values, surface contamination rivals the TCR as an error source, so the value only performs as specified on a clean layout.