RC1206FR-071ML

RC1206FR-071ML is a 1 MΩ ±1% thick-film chip resistor from Yageo in a 1206 (3216 metric) case, documented by Yageo's per-part specification sheet: rated power 0.25 W at 70 °C, temperature coefficient ±100 ppm/°C across −55 °C to +155 °C, maximum continuous working voltage 200 V, overload 400 V and dielectric withstanding voltage 500 V, supplied on 178 mm tape at 5,000 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 500 V at the 70 °C rating — above the 200 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 value on the big platform: quarter-watt power with 200 V continuous working voltage for bleeder, divider-top and high-impedance sensing positions. Selection advice: at 1 MΩ the voltage ratings, not the power, usually bind first — and the same value exists in this series at 0402 with a 50 V ceiling (RC0402FR-071ML, also listed here), so the case size in the code is carrying the voltage specification.