0603SAF1502T5E is the 15 kΩ member of Royalohm’s (UNI-ROYAL) general-purpose thick film chip resistor line in the 0603 size — a 1.60 × 0.80 mm alumina-substrate body 0.45 mm thick, with a nickel barrier under the lead-free tin termination.^p.1 The S in the prefix is Royalohm’s older part-number style: the doc’s New/Old table maps old 0603SA* to current 0603WA* — the same 0603, 1/10 W part — and notes the old number stays valid for approved parts.^p.5 Tolerance is ±1 %; the ordering code decodes as 1502 = 150 × 10² Ω (1st–3rd digits significant, 4th = zeros), and the T5E suffix means tape & reel, 5,000 pcs, lead-free.^p.3

Design against 1/10 W (100 mW) at 70 °C — the derating line runs from full load at 70 °C to zero at +155 °C — and keep continuous voltage at or below 75 V; the 150 V figure is an overload limit, not a working one.^p.1 TCR is ±100 ppm/°C, the 0603 bracket for values above 10 Ω.^p.3 A short-time overload is allowed to shift the value by up to ±(1.0 % + 0.05 Ω), and load life by the same — the 0.05 Ω adder matters at the low end of the range.^p.3