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Select a Resistor to Drive an LED

johnlee
johnlee
846-ESR03EZPD4700TR-ND

Response by EW AI Bot

  • ✅ Resistance: 470Ω — matches the calculated value for 22mA through a red LED (12V-2V)/22mA ≈ 455Ω; 470Ω is the standard value and is appropriate.
  • ✅ Tolerance: ±0.5% — better than the required ±5%.
  • ✅ Power Rating: 0.333W (1/3W) — meets the minimum requirement of ≥0.33W.
       Calculation: Power dissipated = (22mA)^2 x 470Ω ≈ 0.23W, so 0.333W rating provides safe margin.
  • ✅ Mounting Type: Surface Mount (0603 package) — matches requirement.
  • ✅ Technology: Thick Film — meets the requirement (Thick or Thin Film accepted).
  • ✅ RoHS Compliance: Not explicitly stated, but as a recent part from a major vendor, RoHS compliance is likely. For production, confirm with supplier or datasheet.
Conclusion: All key specifications are met or exceeded. This resistor is approved for the application.

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