RMCF0603FT6R80 is a 6.8 Ω ±1 % thick film chip resistor from Stackpole’s RMCF series in the 0603 size — the general-purpose, standard-power branch of the family (RMCP is the high-power one).^p.1 Values this low are written with ‘R’ as the decimal holder (6R80 → 6.8 Ω)^p.15, and the 0603 carries a 3-character marking, underlined on recent date codes to flag the 1 % tolerance.^p.12

The 0603 size is rated 0.1 W at 70 °C, derating to zero at +155 °C, and the part operates from −55 to +155 °C.^{p.1, p.4} Two numbers are easy to misread at this end of the ohmic range. The 75 V column figure is a ceiling, not a promise: rated continuous working voltage is the lesser of √(P×R) and 75 V, and at single-digit ohms the √(P×R) term is the one doing the limiting.^p.1 And TCR here is ±200 ppm/°C — the 1–9.76 Ω band is specified looser than the ±100 ppm/°C the 10 Ω–1 MΩ band gets.^p.1

Budget drift the same way: the load-life limit is ±(1 % + 0.05 Ω) after 1000 h at 70 °C^p.3 — at a value this low the fixed 0.05 Ω adder is on the same order as the percentage term itself, so the real-world tolerance stack is wider than ±1 % alone suggests. Ships as 5,000 pieces of paper tape on a 7-inch reel.^p.15