Bulk Metal® Z-Foil current sensing resistors improve LED brightness and efficiency in portable applications. With respective power ratings of 1 and 8 W and resistance ranges of 0.3–10 Ω and 0.5–500 Ω, LED1625 and LED221 provide TCR of 0.05 ppm/°C nominal (0 to +60°C) and 0.2 ppm/°C nominal (-55 to +125°C, +25°C ref), load-life stability of ±0.005%, and tight tolerances to ±0.01%. Non-inductive (<0.08 µH), non-capacitive design has PCR (or ΔR due to self-heating) of 5 ppm at rated power.