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5. Select a Resistor to Drive an LED

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ERJ-PA3J471V
Component
DigiKey Part NoP470BZTR-ND
Mfr Part NoERJ-PA3J471V
ManufacturerPanasonic Electronic Components

RES SMD 470 OHM 5% 1/3W 0603

470 Ohms ±5% 0.333W, 1/3W Chip Resistor 0603 (1608 Metric) Automotive AEC-Q200, Pulse Withstanding Thick Film

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EW

Response By EW AI

  • Resistance Value: 470Ω – exact match to calculated requirement (470Ω for 22mA at 12V with 2V LED drop)
  • Tolerance: ±5% – matches the requirement (±5% or better)
  • Power Rating: 0.333W (1/3W) – meets the minimum requirement (≥0.33W).
    Calculation: Power dissipated = (Current)2 × Resistance = (0.022A)2 × 470Ω ≈ 0.228W, which is safely below the 0.333W rating.
  • Mounting Type: Surface Mount (0603 package) – meets the requirement
  • Technology: Thick Film – acceptable per requirements
  • RoHS Compliance: Yes (ROHS3 Compliant)

Result: All key specifications are met or exceeded for reliable, safe LED operation in your design.

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